单选题Mary is a clerk（）a job in a top bookstore.AinBwithCtoDfor
单选题
Mary is a clerk（）a job in a top bookstore.
A
in
B
with
C
to
D
for
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Where does this conversation probably take place？A.In a library. B.At a bookstore. C.In an office.
Mary: What are you working on? Susan: I'm doing some embroidery. Mary: ______ Susan: I don't do very much, just for very special occasions.A．I didn't know you did needlework.B．I think you have done a good job.C．Where did you learn to do needlework?D．Why do you do needlework?
阅读下列程序说明和C++代码，将应填入(n)处。【说明】“背包问题”的基本描述是：有一个背包，能盛放的物品总重量为S，设有N件物品，其重量分别为w1；w2，……，wn，希望从N件物品中选择若干件物品，所选物品的重量之和恰能放入该背包，即所选物品的重量之和等于S。如下程序均能求得“背包问题”的一组解，其中程序4.1是“背包问题”的递归解法，而程序4.2是“背包问题”的非递归解法。【程序4.1】include＜stdio.h＞define N 7define S 15int w[N+1]={0，1，4，3，4，5，2，7}；int knap(int s，int n){ if(s==0)return 1；if(s＜0||(s＞0 n＜1))return 0；if((1)))|printf("%4d"，w[n])；return 1；} return (2)；}main(){if(knap(S，N))printf("OK!\n")；else printf("NO!\n")；}【程序4.2】include＜stdio.h＞define N 7define S 15typedef struct{int s；int n：int job；} KNAPTP；int w[N+1]={0，1，4，3，4，5，2，7}；int knap(int s，int n)；main(){if(knap(S，N))printf("OK!\n")；else printf("NO!\n")；}int knap(int s，int n){ KNAPTP stack[100]，x；int top，k，rep；x.s=s；x.n=n；x.job=0；top=|；Stack[top]=x；k=0；while((3)){x=Stack[top]；rep=1；while(!k rep){if(x.s==0)k=1；/*已求得一组解*/else if(x.s＜0||x.n ＜=0)rep＝0；else{x.s＝(4)；x.job＝1；(5)=x；}}if(!k){rep=1；while(top＞＝1rep){x=stack[top--]；if(x.job==1){x.s+=W[x.n+1]；x.job=2；Stack[++top]=x；(6)；}}}}if(k){/*输出一组解*/while(top＞=1){x＝staCk[top--]；if(x.job＝＝1)printf("%d\t"，w[x.n+1])；}}return k；}
Examine the data in the EMPLOYEES and EMP_HIST tables:EMPLOYEESNAME DEPT_ID MGR_ID JOB_ID SALARYEMPLOYEE_ID101 Smith 20 120 SA_REP 4000102 Martin 10 105 CLERK 2500103 Chris 20 120 IT_ADMIN 4200104 John 30 108 HR_CLERK 2500105 Diana 30 108 IT_ADMIN 5000106 Smith 40 110 AD_ASST 3000108 Jennifer 30 110 HR_DIR 6500110 Bob 40 EX_DIR 8000120 Ravi 20 110 SA_DIR 6500EMP HISTEMPLOYEE_ID NAME JOB_ID SALARY101 Smith SA_CLERK 2000103 Chris IT_CLERK 2200104 John HR_CLERK 2000106 Smith AD_ASST 3000108 Jennifer HR_MGR 4500The EMP_HIST table is updated at the end of every year. The employee ID, name, job ID, and salary of each existing employee are modified with the latest data. New employee details are added to the table.Which statement accomplishes this task?（）A. UPDATE emp_hist SET employee_id, name, job_id, salary = (SELECT employee_id, name, job_id, salary FROM employees) WHERE employee_id IN (SELECT employee_id FROM employees);B. MERGE INTO emp_hist eh USING employees e ON (eh.employee_id = e.employee_id) WHEN MATCHED THEN UPDATE SET eh.name = e.name, eh.job_id = e.job_id, eh.salary = e.salary WHEN NOT MATCHED THEN INSERT VALUES (e.employee id, e.name, job id, e.salary);C. MERGE INTO emp_hist eh USING employees e ON (eh.employee_id = e.employee_id) WHEN MATCHED THEN UPDATE emp hist SET eh.name = e.name, eh.job_id = e.job_id, eh.salary = e.salary WHEN NOT MATCHED THEN INSERT INTO emp_hist VALUES (e.employees_id, e.name, e.job_id, e.salary);D. MERGE INTO emp_hist eh USING employees e WHEN MATCHED THEN UPDATE emp_hist SET eh.name = e.name, eh.job_id = e.job_id, eh.salary = e.salary WHEN NOT MATCHED THEN INSERT INTO emp_hist VALUES (e.employees_id, e.name, e.job_id, e.salary);
Which command will create a group called ‘delivery’and set the administrators to john’ and ‘mary’?() A.mkgroup -A=john,mary deliveryB.groupadd -A=john,mary deliveryC.mkgroup adms=john,mary deliveryD.groupadd adms=john,mary delivery
Cirque du Soleil officials said their top concern was______.A. regulations against job discriminationB. the safety of other performers and the audiencesC. doing the right thingD. making a lot of money
Which command will create a group called ’delivery’ and set the administrators to ’john’ and ’mary’？（） A、mkgroup -A=john，mary deliveryB、groupadd -A=john，mary deliveryC、mkgroup adms=john，mary deliveryD、groupadd adms=john，mary delivery
单选题Consider the following table called EMPLOYEES: ID FIRSTNAME LASTNAME JOB LEVEL CLERK 3 If the following SQL statement is executed, how many rows will be deleted? DELETE FROM employees WHERE 1 = 1（）A 0B 1C 3D 6
单选题Looking for a top job? Contact job services.com for a better presented CV.AJob services.com will find you a better job，depending on your CV.BImprove the look of your CV with the help of Job services .com.CIf your CV is well prepared，job services.com will employ you.
单选题What kinds of people are in high demand on the job market?AStudents with a bachelor’s degree in humanities.BPeople with an MBA degree from top universities.CPeople with format schooling plus work experience.DPeople with special training in engineering.
单选题What is true about European chief executives?AThey are dynamic and harsh in management.BThey will be hard on others once they get to the top.CThey have less job security than their American counterparts.DThey work longer than their American counterparts. .
单选题Mary: Hi, Erica. How did you do in the IELTS test? You took it two weeks ago, didn’t you? Erica: Yes, Mary. It was certainly a new experience for me. ______ It was quite a long day and I was very nervous. Mary: ______ Erica: No, nothing special. I just studied the vocabulary by myself in the local library.AI did a good job. ; Anything special?BTherefore, there’s nothing to feel sorry about. ; Will you be nervous next time?CI was lucky enough. ; Is there anything special during the exam?DI didn’t do too well. ; Did you do any specific practice for the test?
多选题User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK，or any data definition language （DDL） command： SQL SELECT job FROM emp 2 WHERE job=’CLERK’ FOR UPDATE OF empno; SCOTT has opened another session to work with the database. Which three operations would wait when issued in SCOTT’s second session？（）ALOCK TABLE emp IN SHARE MODE;BLOCK TABLE emp IN EXCLUSIVE MODE;CDELETE FROM emp WHERE job=’MANAGER’;DINSERT INTO emp（empno，ename） VALUES （1289，’Dick’）;ESELECT job FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno;
多选题User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， or any data definition language （DDL） command： SQL SELECT ename FROM emp 2 WHERE job=’CLERK’ FOR UPDATE OF empno； SCOTT has opened another session to work with the database instance. Which three operations wouldwait when issued in SCOTT’s second session（）ALOCK TABLE emp IN SHARE MODE；BLOCK TABLE emp IN EXCLUSIVE MODE；CUPDATE emp SET sal=sal*1.2 WHERE job=MANAGER；DINSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；ESELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno；
多选题User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， orany data definition language （DDL） command： SQL SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno； SCOTT has opened another session to work with the database instance. Which three operations would waitwhen issued in SCOTT’s second session（）ALOCK TABLE emp IN SHARE MODE；BLOCK TABLE emp IN EXCLUSIVE MODE；CUPDATE emp SET sal=sal*1.2 WHERE job=ANAGER？UPDATE emp SET sal=sal*1.2 WHERE job=？ANAGER？DINSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；ESELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno
单选题If you are a ‘lifer’, ______Ayou take less time to make it to the top.Byou have a long list of previous jobs.Cyou tend to move less far up in the company.Dyou keep changing your job all your life.
单选题Examine the data in the EMPLOYEES table. EMPLOYEES EMP_NAME DEPT_ID MGR_ID JOB_ID SALARY EMPLOYEE_ID 101 Smith 20 120 SA_REP 4000 102 Martin 10 105 CLERK 2500 103 Chris 20 120 IT_ADMIN 4200 104 John 30 108 HR_CLERK 2500 105 Diana 30 108 IT_ADMIN 5000 106 Smith 40 110 AD.ASST 3000 108 Jennifer 30 110 HR_DIR 6500 110 Bob 40 EK_DIR 8000 120 Revi 20 110 SA_DIR 6500 On the EMPLOYEES table, EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID. The JOB_ID column is a NOT NULL column. Evaluate this DELETE statement: DELETE employee_id, salary, job_id FROM employees WHERE dept_id = 90; Why does the DELETE statement fail when you execute it?（）AThere is no row with dept_id 90 in the EMPLOYEES table.BYou cannot delete the JOB_ID column because it is a NOT NULL column.CYou cannot specify column names in the DELETE clause of the DELETE statement.DYou cannot delete the EMPLOYEE_ID column because it is the primary key of the table.
单选题Compared to America, ______Athere is more competition for chief executives in Europe.Blifers in Europe have more chances to get to the top.Cit takes lifers in Europe less time to get to the top.Dexecutives in Europe hop less frequently from job to job.