单选题A foreign graduate student who applies for immigrant status must have ______.Aa U. S. employer’s sponsorship.Bfinancial capital to create ten jobs.Ca job in an American company.Dthe help of an immigration lawyer.
单选题
A foreign graduate student who applies for immigrant status must have ______.
A
a U. S. employer’s sponsorship.
B
financial capital to create ten jobs.
C
a job in an American company.
D
the help of an immigration lawyer.
参考解析
解析：
细节理解题。根据题干信息定位到第三段，可知现在获得博士学位后希望留在美国的大学毕业生必须得到他们雇主的担保，A选项符合文意；根据第二段中的“A foreigner who invests one million dollars in a commercial enterprise established…status”可知，那些能够带来一定数额的金融资本（这些金融资本能够创造就业机会）的外国公民可以获得移民身 份，外国大学毕业生申请移民资格的不一定要一定数额的金融资本，故B 选项错误；根据第四段第五句“But things may not go right…an immigration lawyer”可知，情况可能不会那么顺利：在每个阶段都可能出现问题。因此，雇主或者移民申请人必须雇佣一个负责处理移民事务的律师，即只有当移民申请过程中遇到问题时才需要律师的帮助，故D选项错误。所以本题答案为A项。
细节理解题。根据题干信息定位到第三段，可知现在获得博士学位后希望留在美国的大学毕业生必须得到他们雇主的担保，A选项符合文意；根据第二段中的“A foreigner who invests one million dollars in a commercial enterprise established…status”可知，那些能够带来一定数额的金融资本（这些金融资本能够创造就业机会）的外国公民可以获得移民身 份，外国大学毕业生申请移民资格的不一定要一定数额的金融资本，故B 选项错误；根据第四段第五句“But things may not go right…an immigration lawyer”可知，情况可能不会那么顺利：在每个阶段都可能出现问题。因此，雇主或者移民申请人必须雇佣一个负责处理移民事务的律师，即只有当移民申请过程中遇到问题时才需要律师的帮助，故D选项错误。所以本题答案为A项。
相关考题：
The increase in international business and in foreign investment has created a need for executives with knowledge of foreign languages and skills in cross-cultural communication. Americans, however, have not been well trained in either area and, consequently, have not enjoyed the same level of success in negotiation in an international arena as have their foreign counterparts.Negotiating is the process of communicating back and forth for the purpose of reaching an agreement. It involves persuasion and compromise, but in order to participate in either one, the negotiators must understand the ways in which people are persuaded and how compromise is reached within the culture of the negotiation.In many international business negotiations abroad, Americans are perceived as wealthy and impersonal. It often appears to the foreign negotiator that the American represents a large multi-million-dollar corporation that can afford to pay the price without bargaining further. The American negotiator's role becomes that of an impersonal supplier of information and cash.In studies of American negotiators abroad, several traits have been identified that may serve to confirm this stereotypical perception, while undermining the negotiator's position. Two traits in particular that cause cross-cultural misunderst anding are directness and impatience on the part of the American negotiator. Furthermore, American negotiators often insist on realizing short-term goals. Foreign negotiators, on the other hand, may value the relationship established between negotiators and may be willing to invest time in it for long-term benefits. In order to solidify the relationship, they may opt for indirect interactions without regard for the time involved in getting to know the other negotiator.Clearly, perceptions and differences in values affect the outcomes of negotiations and the success of negotiators. For Americans to play a more effective role in international business negotiations, they must put forth more effort to improve cross-cultural understanding.(1) What kind of manager is needed in present international business and foreign investment?A、The man who represents a large multi-million-dollar corporation.B、The man with knowledge of foreign languages and skills in cross-cultural communication.C、The man who is wealthy and impersonal.D、The man who can negotiate with his foreign counterparts.(2) According to the passage, international business negotiation involves.A、short-term goalsB、long-term benefitsC、information and cashD、persuasion and compromise(3) In the foreign negotiators’eyes their American counterparts are.A、impersonal suppliers of information and cashB、skillful in negotiationC、good at establishing relationship between negotiatorsD、indirect and impatient(4) Which of the following is NOT mentioned in the passage?A、Foreign negotiators are willing to invest time in relationship between negotiators.B、American negotiator's directness and impatience cause cross-cultural misunderstanding.C、Americans has played a more effective role in international business negotiations.D、Foreign negotiators think that American can afford to pay the price without bargaining(5) What is the topic of this passage?A、The differences between American negotiators and foreign negotiatorsB、Negotiation skillsC、International business and cross-cultural communicationD、Cross-cultural understanding
The writer mentioned the case of the United States to justify the policy of _______ .A providing financial support overseasB preventing foreign capital's controlC building industrial infrastructureD accepting foreign investment
假设有如下的记录类型： Type Student number As String name AS String age As Integer End Type 则正确引用该记录类型变量的代码是______。A．Student. name="" s. name="张红"B．Dim s As Student s. Dame="张红"C．Dim s As Type Student s. name="张红"D．Dim s As Type s. name="张红"
In the U. S., at Christmas, schoolchildren have ______ for holiday.A. a monthB. a weekC. two weeksD. three weeks
查询选修课程在5门以上(含5门)的学生的学号、姓名和平均成绩，并按平均成绩降序排序，正确的命令是（ ）。A.SELECT S．学号，姓名，平均成绩FROM student s，score sc WHERE S．学号=sc．学号 GROUP BY s．学号HAVING COUNT(*)=5 ORDER BY平均成绩DESCB.SELECT s．学号，姓名，AVG(成绩)FROM student s，score sc WHERE s．学号=SC．学号AND COUNT(*)=5 GRoUP BY学号0RDER BY 3 DESCC.SELECT S．学号，姓名，AVG(成绩)平均成绩FROM student s，score sc WHERE s．学号=SC．学号AND COUNT(*)=5 GROUP BY s．学号ORDER BY平均成绩DESCD.SELECT s．学号，姓名，AVG(成绩)平均成绩FROM student s，score sc WHERE s．学号=sc．学号 GROUP BY s．学号HAVING COUNT(*)=5 0RDER BY 3 DESC
The fact that "almost one-fourth of engineers in America who earned Ph.D． s are foreign born" implies that（ ）[A] the majority of American people are not interested in getting Ph.D．[B]foreign students are more eager to get Ph. D．[C] the American education has lagged behind in the New Economy[D]American students are not as clever as foreign students
When American-born actor Michael Pena was a year old, his parents were deported. They had illegally walked across the U.S. border from Mexico and when they were caught by immigration authorities, they sent Pena and his brother to stay with relatives in the U.S. “It was quite a bit of a gamble for my parents,” says Pena, “but they came back a year later.” Pena?s father, who had been a farmer in Mexico, got a job at a button factory in Chicago and, eventually, a green card. Pena stayed in Chicago until, at 19, he fled to Los Angeles to pursue his acting dreams. This family history makes Pena?s latest role especially personal. In Cesar Chavez, Pena plays the labor leader as he struggles to organize immigrant California farm workers in the 1960s. To pressure growers to improve working conditions and wages, Chavez led a national boycott of table grapes that lasted from 1965 to 1970 and is recorded in the film. Chavez, like Pena, was the American-born son of Mexican farmers who immigrated to the U.S. “He understands this duality, the feeling of being born in a place but having a very big idea of where your heritage comes from,” says the film director, Diego Luna. “This thing of having to go to school and learn in English and then go home to speak Spanish with your parents.” As immigration policy is hotly debated on Capitol Hill this year, Luna and others who were involved with Cesar Chavez are hoping the movie will spark new support for reform and inspire American Latinos to get involved. “The message Chavez left was that change couldn?t happen without the masses being a part of their own change,” says Ferrera, a first generation Honduran American who plays the union leader?s wife Helen. Rosario Dawson, who co-founded the advocacy group Voto Latino, plays Chavez ally and labor leader Dolores Huerta.Immigrant-rights issues in the U.S. have evolved substantially in the years since Chavez founded the United Farm Workers (UFW). Undocumented workers now make up a far larger share of the agricultural workforce in California than they did in the 1960s, according to Miriam Pawel, author of The Crusades of Cesar Chavez, published the next month. Chavez was vehemently against illegal immigration, believing it made strikes difficult to execute and weakened the union. He initiated a program in the mid-1970s to locate undocumented farm workers and report them to immigration officials, Pawel writes. And despite his early victories, Chavez?s UFW union represents just a small part of those working on California farms today. “Chavez?s legacy is not in the field, which is sad,” says Pawel. Still, she says, his organizing strategies, featured extensively in Cesar Chavez, have been adopted by other activists, including those leading the modern immigrant-rights movement. Chavez's most important contribution may have been humanizing the Latino population for the American public. Farm laborers, many of whom barely spoke English, traveled across the country during the grape boycott, standing outside grocery stores to persuade housewives not to buy grapes and to spread the word about their plight. “They gave the boycott this very human face,” says Pawel. “It was families talking to other families,” says Luna. “It?s about the power we have just by being who we are.”Which of the following is closest in meaning to the underlined word "vehemently" in PARAGRAPH FOUR? A. Emotionally. B. Deliberately. C. Strongly D. Actively.
When American-born actor Michael Pena was a year old, his parents were deported. They had illegally walked across the U.S. border from Mexico and when they were caught by immigration authorities, they sent Pena and his brother to stay with relatives in the U.S. “It was quite a bit of a gamble for my parents,” says Pena, “but they came back a year later.” Pena?s father, who had been a farmer in Mexico, got a job at a button factory in Chicago and, eventually, a green card. Pena stayed in Chicago until, at 19, he fled to Los Angeles to pursue his acting dreams. This family history makes Pena?s latest role especially personal. In Cesar Chavez, Pena plays the labor leader as he struggles to organize immigrant California farm workers in the 1960s. To pressure growers to improve working conditions and wages, Chavez led a national boycott of table grapes that lasted from 1965 to 1970 and is recorded in the film. Chavez, like Pena, was the American-born son of Mexican farmers who immigrated to the U.S. “He understands this duality, the feeling of being born in a place but having a very big idea of where your heritage comes from,” says the film director, Diego Luna. “This thing of having to go to school and learn in English and then go home to speak Spanish with your parents.” As immigration policy is hotly debated on Capitol Hill this year, Luna and others who were involved with Cesar Chavez are hoping the movie will spark new support for reform and inspire American Latinos to get involved. “The message Chavez left was that change couldn?t happen without the masses being a part of their own change,” says Ferrera, a first generation Honduran American who plays the union leader?s wife Helen. Rosario Dawson, who co-founded the advocacy group Voto Latino, plays Chavez ally and labor leader Dolores Huerta.Immigrant-rights issues in the U.S. have evolved substantially in the years since Chavez founded the United Farm Workers (UFW). Undocumented workers now make up a far larger share of the agricultural workforce in California than they did in the 1960s, according to Miriam Pawel, author of The Crusades of Cesar Chavez, published the next month. Chavez was vehemently against illegal immigration, believing it made strikes difficult to execute and weakened the union. He initiated a program in the mid-1970s to locate undocumented farm workers and report them to immigration officials, Pawel writes. And despite his early victories, Chavez?s UFW union represents just a small part of those working on California farms today. “Chavez?s legacy is not in the field, which is sad,” says Pawel. Still, she says, his organizing strategies, featured extensively in Cesar Chavez, have been adopted by other activists, including those leading the modern immigrant-rights movement. Chavez's most important contribution may have been humanizing the Latino population for the American public. Farm laborers, many of whom barely spoke English, traveled across the country during the grape boycott, standing outside grocery stores to persuade housewives not to buy grapes and to spread the word about their plight. “They gave the boycott this very human face,” says Pawel. “It was families talking to other families,” says Luna. “It?s about the power we have just by being who we are.”What did the film-makers want to achieve through the movie Cesar Chavez? A. To report on immigration policy debates. B. To stir immigration debates with a biopic. C. To make known the achievements of Michael Pena. D. To highlight the seeds of change within the masses involved.
When American-born actor Michael Pena was a year old, his parents were deported. They had illegally walked across the U.S. border from Mexico and when they were caught by immigration authorities, they sent Pena and his brother to stay with relatives in the U.S. “It was quite a bit of a gamble for my parents,” says Pena, “but they came back a year later.” Pena?s father, who had been a farmer in Mexico, got a job at a button factory in Chicago and, eventually, a green card. Pena stayed in Chicago until, at 19, he fled to Los Angeles to pursue his acting dreams. This family history makes Pena?s latest role especially personal. In Cesar Chavez, Pena plays the labor leader as he struggles to organize immigrant California farm workers in the 1960s. To pressure growers to improve working conditions and wages, Chavez led a national boycott of table grapes that lasted from 1965 to 1970 and is recorded in the film. Chavez, like Pena, was the American-born son of Mexican farmers who immigrated to the U.S. “He understands this duality, the feeling of being born in a place but having a very big idea of where your heritage comes from,” says the film director, Diego Luna. “This thing of having to go to school and learn in English and then go home to speak Spanish with your parents.” As immigration policy is hotly debated on Capitol Hill this year, Luna and others who were involved with Cesar Chavez are hoping the movie will spark new support for reform and inspire American Latinos to get involved. “The message Chavez left was that change couldn?t happen without the masses being a part of their own change,” says Ferrera, a first generation Honduran American who plays the union leader?s wife Helen. Rosario Dawson, who co-founded the advocacy group Voto Latino, plays Chavez ally and labor leader Dolores Huerta.Immigrant-rights issues in the U.S. have evolved substantially in the years since Chavez founded the United Farm Workers (UFW). Undocumented workers now make up a far larger share of the agricultural workforce in California than they did in the 1960s, according to Miriam Pawel, author of The Crusades of Cesar Chavez, published the next month. Chavez was vehemently against illegal immigration, believing it made strikes difficult to execute and weakened the union. He initiated a program in the mid-1970s to locate undocumented farm workers and report them to immigration officials, Pawel writes. And despite his early victories, Chavez?s UFW union represents just a small part of those working on California farms today. “Chavez?s legacy is not in the field, which is sad,” says Pawel. Still, she says, his organizing strategies, featured extensively in Cesar Chavez, have been adopted by other activists, including those leading the modern immigrant-rights movement. Chavez's most important contribution may have been humanizing the Latino population for the American public. Farm laborers, many of whom barely spoke English, traveled across the country during the grape boycott, standing outside grocery stores to persuade housewives not to buy grapes and to spread the word about their plight. “They gave the boycott this very human face,” says Pawel. “It was families talking to other families,” says Luna. “It?s about the power we have just by being who we are.” What has made Pena?s role as Chavez in the movie Cesar Chavez so distinctive? A. His Mexican immigrant background. B. His Awareness of his Mexican heritage. C. His bilingual life at home and at school. D. His status before legal registration in the US.
When American-born actor Michael Pena was a year old, his parents were deported. They had illegally walked across the U.S. border from Mexico and when they were caught by immigration authorities, they sent Pena and his brother to stay with relatives in the U.S. “It was quite a bit of a gamble for my parents,” says Pena, “but they came back a year later.” Pena?s father, who had been a farmer in Mexico, got a job at a button factory in Chicago and, eventually, a green card. Pena stayed in Chicago until, at 19, he fled to Los Angeles to pursue his acting dreams. This family history makes Pena?s latest role especially personal. In Cesar Chavez, Pena plays the labor leader as he struggles to organize immigrant California farm workers in the 1960s. To pressure growers to improve working conditions and wages, Chavez led a national boycott of table grapes that lasted from 1965 to 1970 and is recorded in the film. Chavez, like Pena, was the American-born son of Mexican farmers who immigrated to the U.S. “He understands this duality, the feeling of being born in a place but having a very big idea of where your heritage comes from,” says the film director, Diego Luna. “This thing of having to go to school and learn in English and then go home to speak Spanish with your parents.” As immigration policy is hotly debated on Capitol Hill this year, Luna and others who were involved with Cesar Chavez are hoping the movie will spark new support for reform and inspire American Latinos to get involved. “The message Chavez left was that change couldn?t happen without the masses being a part of their own change,” says Ferrera, a first generation Honduran American who plays the union leader?s wife Helen. Rosario Dawson, who co-founded the advocacy group Voto Latino, plays Chavez ally and labor leader Dolores Huerta.Immigrant-rights issues in the U.S. have evolved substantially in the years since Chavez founded the United Farm Workers (UFW). Undocumented workers now make up a far larger share of the agricultural workforce in California than they did in the 1960s, according to Miriam Pawel, author of The Crusades of Cesar Chavez, published the next month. Chavez was vehemently against illegal immigration, believing it made strikes difficult to execute and weakened the union. He initiated a program in the mid-1970s to locate undocumented farm workers and report them to immigration officials, Pawel writes. And despite his early victories, Chavez?s UFW union represents just a small part of those working on California farms today. “Chavez?s legacy is not in the field, which is sad,” says Pawel. Still, she says, his organizing strategies, featured extensively in Cesar Chavez, have been adopted by other activists, including those leading the modern immigrant-rights movement. Chavez's most important contribution may have been humanizing the Latino population for the American public. Farm laborers, many of whom barely spoke English, traveled across the country during the grape boycott, standing outside grocery stores to persuade housewives not to buy grapes and to spread the word about their plight. “They gave the boycott this very human face,” says Pawel. “It was families talking to other families,” says Luna. “It?s about the power we have just by being who we are.”Which of the following may best summaries Chavez?s contribution in leading the Latino immigrant-rights movement? A. The American public came to realize the power of change in the Latino community. B. The modern immigrant-rights movement leaders knew how to organize their activities strategically. C. The U.S. government knew how to locate undocumented farm workers and offer them official registration. D. The Mexican farm workers could travel across the country during the grape boycott to share their sufferings.
What's an Apprentice?As everyone knows, opportunities in the skilled trades are set to explode in the next five to ten years.Many skilled trades train workers through apprenticeships - new workers spend up to 80% of their dayslearning on the job, and only 20% in the classroom. This is accomplished through being paired with an expert in the trade who will guide the apprentice through their learning process.Many countries have developed special ””pre-apprenticeship”” secondary school programs. If you are in high school, by participating in these programs you can learn job skills and earn credits towards your apprenticeship before you even graduate. Apprenticeships range from auto mechanics to cabinetmaking, construction, and pastry makingWhat is an apprentice according to this article?A. Anyone who spends 20% of his or her time inside a classroomB. An expert in a skilled trade who spends 80% of his or her time on the jobC. Any high school student who is learning job skillsD. A new worker matched with an expert to learn a skilled trade
Being financially secure in retirement just doesn’t happen magically It takes lots of planning time and savingsSome scary facts about retirement?More than 50% of persons do not have enough finances for retirement?25%do not participate in their company’s retirement plan?The average person spends 20 years in retirementHere are some tips to help you plan correctly1. Talk to a financial professional. Every few years it’s a good idea to schedule a meeting with a financial planner to get a “check-up”. It’s just like a doctor’s visit and you should really talk about your present situation and future goals2. Save and keep on saving. Make it a habit to save as much as you can3. Learn your retirement needs. Retirement can be expensive. Learn from today how much you need to save for your retirement. Talk to a financial planner or find an online retirement calculator4. Take part in your employer’s retirement plans. If your company offers one it is usually the best tool you can use. Talk to a financial professional for all your options5. Learn about pension. If you have an employer or government pension plan learn all the details6. Keep your retirement savings off-limits. Don’t make a withdrawal until you retire. You might incur penalties and it will be a setback for realizing your goalsWho can be a financial professional?A. The professional who will do physical “check-up” for youB. The professional who will visit you like a doctorC. The professional who will schedule a meeting with youD. The professional who will help you make your financial plans
资料：Being financially secure in retirement just doesn't happen magically. It takes lots of planning, time and savings.Some scary facts about retirement:More than 50% of persons do not have enough finances for retirement.25% do not participate in their company's retirement plan.The average person spends 20 years in retirement.Here are some tips to help you plan correctly:1. Talk to a financial professional. Every few years, it's a good idea to schedule a meeting with a financial planner to get a “check-up”. It's just like a doctor's visit, and you should really talk about your present situation and future goals.2. Save, save, and keep on saving. Make it a habit to save as much as you can.3. Learn your retirement needs. Retirement can be expensive. Learn from today how much you need to save for your retirement. Talk to a financial planner, or find an online retirement calculator.4. Take part in your employer's retirement plans. If your company offers one, it is usually the best tool you can use. Talk to a financial professional for all your options.5. Learn about pension plans. If you have an employer or government pension plan, learn all the details.6. Keep your retirement savings off-limits. Don't make a withdrawal until you retire. You might incur penalties and it will be a setback for realizing your goals.7. Get your employer to start one, and it can help you tremendously.8. Learn about your government's retirement plans. Every country has different plans, some with special tax incentives, so learn what your country offers and plan accordingly.9. Do your own research. Use the Internet, read the newspapers and magazines, talk to your friends, to find out as much as you can about retirement.Who can be a financial professional?A.The professional who will do a physical “check-up” for you.B.The professional who will visit you like a doctor.C.The professional who will schedule a meeting with you.D.The professional who will help you make your financial plans.
While designing your database， you have created the EMPLOYEES table as an index/x7forganized table （IOT）. You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index？（）A、A primary key must have been created.B、A mapping table must have been created.C、An overflow tablespace must have been specified.D、The PCTTHRESHOLD option must have been specified.
While designing your database， you have created the EMPLOYEES table as an index-organized table （IOT）. You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index？（） A、A primary key must have been created.B、A mapping table must have been created.C、An overflow tablespace must have been specified.D、The PCTTHRESHOLD option must have been specified.
You need to design a student registration database that contains several tables storing academic information. The STUDENTS table stores information about a student. The STUDENT_GRADES table stores information about the student's grades. Both of the tables have a column named STUDENT_ID. The STUDENT_ID column in the STUDENTS table is a primary key. You need to create a foreign key on the STUDENT_ID column of the STUDENT_GRADES table that points to the STUDENT_ID column of the STUDENTS table. Which statement creates the foreign key?（）A、CREATE TABLE student_grades (student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk REFERENCES (student_id) FOREIGN KEY student (student_id));B、CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));C、CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT FOREIGN KEY (student_id) REFERENCES student (student_id));D、CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));
单选题You need to design a student registration database that contains several tables storing academic information. The STUDENTS table stores information about a student. The STUDENT_GRADES table stores information about the student's grades. Both of the tables have a column named STUDENT_ID. The STUDENT_ID column in the STUDENTS table is a primary key. You need to create a foreign key on the STUDENT_ID column of the STUDENT_GRADES table that points to the STUDENT_ID column of the STUDENTS table. Which statement creates the foreign key?（）ACREATE TABLE student_grades (student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk REFERENCES (student_id) FOREIGN KEY student (student_id));BCREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));CCREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT FOREIGN KEY (student_id) REFERENCES student (student_id));DCREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));
单选题查询所修课程成绩都大于等于85分的学生的学号和姓名，正确的命令是（ ）。ASELECT学号，姓名FROM student s WHERE NOT EXISTSSELECT*FROM score sc WHERE sc.学号=s.学号AND成绩85)BSELECT学号，姓名FROM student s WHERE NOT EXISTSSELECT*FROM score sc WHERE sc.学号=s.学号AND成绩=85)CSELECT学号，姓名FROM student s.score scWHERE s.学号=sc.学号AND成绩=85DSELECT学号，姓名FROM student s.score scWHERE s.学号=sc.学号AND ALL成绩=85
问答题Practice 1 The catchphrase of the hour is that America is living beyond its means. The expression is used so much by politicians, economists and editorial writers that it is depreciating faster than the dollar. But there's no way around it. It tells the story. The Data Resources numbers show Americans increase their spending this year almost three times as fast as their after-tax income. What else can we explain it? What is more, as a nation, the U.S. has been doing the same thing throughout the 1990s. For years the country has been consuming more than it produces, making up the difference by borrowing abroad. It can't go on. The stock market's tumble, which has caused a loss of $1 trillion in paper wealth, is but the first step in a process that must sober the nation. At the same time, in the next few years the U. S. will have to throw its amazing dream machine into reverse and start paying its debts. Inevitably, this will mean a lowering in the U.S. standard of living as Americans are forced to produce more than they consume to service a soaring foreign debt. Per capital income may keep rising but more slowly than in the past. The trade account will go slowly towards balance or even surplus in the mid-1990s. But in the meantime, Americans will receive less for their exports because the dollar will fall considerably before U. S. exports are competitive. And pressures to reduce the federal deficit will tighten the lid on defense spending.
单选题What is the author’s attitude toward the U. S. health care system?APrejudiced.BCritical.CSympathetic.DApproving.
单选题While designing your database， you have created the EMPLOYEES table as an index/x7forganized table （IOT）. You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index？（）AA primary key must have been created.BA mapping table must have been created.CAn overflow tablespace must have been specified.DThe PCTTHRESHOLD option must have been specified.
单选题Virtual reality can help future teachers learn how to _____.Aassess students’ skill levelsBrespond to individual student’s needsCdeal with students who misbehaveDrun an orderly classroom
单选题Prior to this text, the author has most probably made an analysis of ______.Abrain gain in the United States.Bthe cause of problems of the black people.Cthe U. S educational programs for blacks.Dthe procedure of foreign students’ immigration.
单选题查询选修课程在5门以上（含5门）的学生的学号、姓名和平均成绩，并按平均成绩降序排序，正确的命令是（ ）。ASELECT s.学号，姓名，平均成绩FROM student s.score scWHERE s.学号=sc.学号GROUP BY s.学号HAVING COUNT(*)=5 ORDER BY平均成绩DESCBSELECT学号，姓名，AVG(成绩)FROM student s，score scWHERE s.学号=sc.学号AND COUNT(*)=5GROUP BY学号ORDER BY 3 DESCCSELECT s.学号，姓名，AVG(成绩)平均成绩FROM student s，score soWHERE s.学号=sc.学号AND COUNT(*)=5GROUP BY s．学号ORDER BY平均成绩DESCDSELECT s.学号，姓名，AVG(成绩)平均成绩FROM student s，score scWHERE s.学号=sc.学号GROUP BY s.学号HAVING COUNT(*)=5 ORDER BY 3 DESC
单选题While designing your database， you have created the EMPLOYEES table as an index-organized table （IOT）. You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index？（）AA primary key must have been created.BA mapping table must have been created.CAn overflow tablespace must have been specified.DThe PCTTHRESHOLD option must have been specified.
问答题[A] Difficulty of changing one's immigration status. [B] Extent of error in card completion. [C] Classification of border-crossers. [D] Uncertainty in categorization. [E] Computer-assisted measurement of illegal immigration. [F] Preventing illegal immigration. [G] Determining net flow of population. Whenever a person enters or leaves the island nation of Freedonia, he or she must fill out an arrival or departure card. The data collected from the cards are entered into a computer database, known as the Inflow/Outflow Record (IOR). The Immigration Bureau uses the IOR to monitor changes in the population of Freedonia, which was estimated in 1994 to be 14.4 million people. 1. ___________________________ The cards do more than just help count the number of people coming and going. The people who cross Freedonia's borders are put into one of several categories depending on how they fill out their card. The first category, labelled "Category M" by the Immigration Bureau, is made up of people, usually tourists and business travellers from abroad, whose stay in Freedonia is less than 6 months. In "Category N" are citizens and residents of Freedonia who go abroad for a similar period of time. "Category P" includes foreigners who stay in Freedonia for a period longer than 6 months, while Freedonians who leave the country for more than 6 months are put in "Category Q". Then there are the people who migrate permanently to Freedonia, known as "Category R", and those who permanently emigrate from the island state, who are placed in "Category S". Emigrants, it should be noted, are sometimes former immigrants to Freedonia. 2. ___________________________ One problem with maintaining the IOR is that the departure and arrival cards ask for people's intentions, and intentions do not always become reality. Freedonia's population includes many people who originally entered the country on a temporary visa but who later applied for and were given permanent status; in this way, someone who was Category M becomes Category R. This is not too great a problem as changes in migration status inside the country can easily be tracked and entered into the IOR. It becomes difficult to make accurate categorizations, though, when Freedonians move overseas with plans to return--whether in less than 6 months or after a longer period—but do not, in fact, come back. Similarly, Freedonians who claim to be emigrating to other countries may change their minds and return to Freedonia. 3. ___________________________ People may also make mistakes when filling out the cards. In 1994, a study was made of 21,730 arrival and departure cards filled out by people leaving from Freedonia's major airports and seaports. The study showed that one in five cards had errors. A total of 4,008 passengers who were citizens of Freedonia mistakenly said that they were temporary entrants to Freedonia. Of these,18 percent were, in fact, emigrating or Category Q leavers. The study's most important finding was the lack of certainty expressed by departing Freedonians about when they planned to return to Freedonia. The arrival and departure cards were redesigned by the Immigration Bureau after the 1994 study, but while the new cards have been in use for over a decade, no new research has been done. 4. ___________________________ The unrecorded movements of people from one category to another make it hard to measure the flow of population, but it should be said that Freedonia is the only nation with high overall immigration that keeps reliable records of departures. In this way, the Immigration Bureau is able to keep track of departing native Freedonians as well as former settlers. By monitoring both immigration and emigration, the Bureau is able to maintain a record of net migration, the total gain or loss of people over a period of time. In other countries with high level of immigration, the issue of net migration has often been neglected. 5. ___________________________ One final benefit of the IOR is the help it gives in determining the level of illegal immigration to Freedonia. People who enter Freedonia saying they will stay in the country for under six months will appear automatically in the database as "Category T" if they have not left the country after the end of that period. Unlike countries such as the United States that have little idea of the true extent of illegal immigration entering their borders, Freedonia's Immigration Bureau has shown it is able to keep a fairly accurate count.