Vitamins are similar because they are made of the same elements—usually carbon,hydrogen,oxygen,and sometimes nitrogen.They are different in that their elements are arranged differently,and each vitamin been（ ）one or more specific functions in the body.A.holdsB.playsC.performs
Vitamins are similar because they are made of the same elements—usually carbon,hydrogen,oxygen,and sometimes nitrogen.They are different in that their elements are arranged differently,and each vitamin been（ ）one or more specific functions in the body.
A.holds
B.plays
C.performs
B.plays
C.performs
参考解析
解析：根据句意，所选项要有“起作用”的含义。四个选项中，只有D.perform“执行，履行”与function相搭配，意为“起作用”。A.undertake“着手，承担”；B.hold“抓住，掌握”；C.play常和part或role搭配，也可表达“起作用”之意。
相关考题：
Body language can sometimes lead to () since people of different cultures often have different forms of behavior. for sending the same message or have different interpretations of the same signal.A、effectivenessB、misunderstandingC、agreementD、communication
According to this passage,A．brokers usually perform. the same kinds of services to their customers.B．brokers have little contact with each other.C．open competition tends to result in a common price for similar transactions at any given moment.D．changes in the pressure of available supplies of funds upon market tends to maintain a common price for similar transactions.
The requisites for planning activities include________________. A.how the activities fit the objectivesB.the differences between the what and the how of each activityC.you can plan the activity with any different forms as you likeD.which activities demand oral or written work, which have visual, and which have tactile elements
String[]elements={for”,tea”,too”};Stringfirst=(elements.length0)?elements[0]null;Whatistheresult?() A.Compilationfails.B.Anexceptionisthrownatruntime.C.Thevariablefirstissettonull.D.Thevariablefirstissettoelements[0].
Software entities are more complex for their size than perhaps any other human construct, because no two parts are alike (at least above the statement level). If they are, we make the two similar parts into one, a （ ）, open or closed.In this respect software systems differ profoundly from computers, buildings, or automobiles, where repeated elements abound. Digital computers are themselves more complex than most things people build; they have very large numbers of states.This makes conceiving, describing, and testing them hard.Software systems have orders of magnitude more（ ）than computers do. Likewise, a scaling-up of a software entity is not merely a repetition of the same elements in larger size; it is necessarily an increase in the number of different elements.In most cases, the elements interact with each other in some（ ）fashion, and the complexity of the whole increases much more than linearly. The complexity of software is a(an) （ ）property, not an accidental one.Hence descriptions of a software entity that abstract away its complexity often abstract away its essence.Mathematics and the physical sciences made great strides for three centuries by constructing simplified models of complex phenomena, deriving, properties from the models,and verifying those properties experimentally.This worked because the complexities（ ）in the models were not the essential properties of the phenomena.It does not work when the complexities are the essence. Many of the classical problems of developing software products derive from this essential complexity and its nonlinear increases with size.Not only technical problems but management problems as well come from the complexity.A.task B.job C.subroutine D.programA.states B.parts C.conditions D.expressionsA.linear B.nonlinear C.parallel D.additiveA.surface B.outside C.exterior D.essentialA.fixed B.included C.ignored D.stabilized
Click the Exhibit button. In the DCN connection shown in the exhibit, all non-GNE nodes are located on different subnets from the GNE. There are no static routes or external OSPF on any elements. CTC Workstation and GNE have Cisco Router as their default gateway.Can the CTC workstation see the entire SONET network?（）A. Yes, but only if OSPF is enabled around the ring.B. Yes, because the GNE will only serve as a proxy-ARP for elements on the same subnet.C. Yes, but only if the router‘s address is entered as a static route in the non-GNE elements.D. Yes, because the GNE will serve as a proxy-ARP for all elements, regardless of their subnets.
Social change is more likely to occur in societies where there is a mixture of different kinds of people than in societies where people are similar in many ways. The simple reason for this is that there are more different ways of looking at things present in the first kind of society. There are more ideas, more disagreements in interest, and more groups and organizations with different beliefs. In addition, there is usually a greater worldly interest and greater tolerance in mixed societies. All these factors tend to protnote social change by opening more areas of life to decision.In a society where people are quite similar in many ways, there are fewer occasions for people to see the need or the opportunity for change because everything seems to be the same. And although conditions may not be satisfactory, they are at least customary and undisputed.Within a society, social changes is also likely to occur more frequently and more readily in the material aspects of the culture than in the non-material, for example, in technology rather than in values; in what has been learned later in life rather than what was learned early; in the less basic and less emotional aspects of society than in their opposites; in the simple elements rather than in the complex ones; in form rather than in substance; and in elements that are acceptable to the culture rather than in strange elements.Furthermore, social change is easier if it is gradual. For example, it comes more readily in human relations on a continuous scale rather than one with sharp difference. This is one reason why change has not come more quickly to Black Americans as compared to other American minorities,because of the sharp difference in appearance between them and their white counterparts.One of the factors that tend to promote social change is__________.A.joint interestB.different points of viewC.less emotional peopleD.advanced technology
Social change is more likely to occur in societies where there is a mixture of different kinds of people than in societies where people are similar in many ways. The simple reason for this is that there are more different ways of looking at things present in the first kind of society. There are more ideas, more disagreements in interest, and more groups and organizations with different beliefs. In addition, there is usually a greater worldly interest and greater tolerance in mixed societies. All these factors tend to protnote social change by opening more areas of life to decision.In a society where people are quite similar in many ways, there are fewer occasions for people to see the need or the opportunity for change because everything seems to be the same. And although conditions may not be satisfactory, they are at least customary and undisputed.Within a society, social changes is also likely to occur more frequently and more readily in the material aspects of the culture than in the non-material, for example, in technology rather than in values; in what has been learned later in life rather than what was learned early; in the less basic and less emotional aspects of society than in their opposites; in the simple elements rather than in the complex ones; in form rather than in substance; and in elements that are acceptable to the culture rather than in strange elements.Furthermore, social change is easier if it is gradual. For example, it comes more readily in human relations on a continuous scale rather than one with sharp difference. This is one reason why change has not come more quickly to Black Americans as compared to other American minorities,because of the sharp difference in appearance between them and their white counterparts.?The expression "greater tolerance" (Para. 1) refers to__________.A.greater willingness to accept social changeB.quicker adaptation to changing circumstancesC.more respect for different beliefs and behaviorD.greater readiness to agree to different opinions and ideas
Social change is more likely to occur in societies where there is a mixture of different kinds of people than in societies where people are similar in many ways. The simple reason for this is that there are more different ways of looking at things present in the first kind of society. There are more ideas, more disagreements in interest, and more groups and organizations with different beliefs. In addition, there is usually a greater worldly interest and greater tolerance in mixed societies. All these factors tend to protnote social change by opening more areas of life to decision.In a society where people are quite similar in many ways, there are fewer occasions for people to see the need or the opportunity for change because everything seems to be the same. And although conditions may not be satisfactory, they are at least customary and undisputed.Within a society, social changes is also likely to occur more frequently and more readily in the material aspects of the culture than in the non-material, for example, in technology rather than in values; in what has been learned later in life rather than what was learned early; in the less basic and less emotional aspects of society than in their opposites; in the simple elements rather than in the complex ones; in form rather than in substance; and in elements that are acceptable to the culture rather than in strange elements.Furthermore, social change is easier if it is gradual. For example, it comes more readily in human relations on a continuous scale rather than one with sharp difference. This is one reason why change has not come more quickly to Black Americans as compared to other American minorities,because of the sharp difference in appearance between them and their white counterparts.?Social change is less likely to occur in a society where people are quite similar in many ways because__________.A.people there have got so accustomed to their conditions that they seldom think it necessary to changeB.people there have identical needs that can be satisfied without much difficultyC.people there are easy to pleaseD.people there are less disputed
Social change is more likely to occur in societies where there is a mixture of different kinds of people than in societies where people are similar in many ways. The simple reason for this is that there are more different ways of looking at things present in the first kind of society. There are more ideas, more disagreements in interest, and more groups and organizations with different beliefs. In addition, there is usually a greater worldly interest and greater tolerance in mixed societies. All these factors tend to protnote social change by opening more areas of life to decision.In a society where people are quite similar in many ways, there are fewer occasions for people to see the need or the opportunity for change because everything seems to be the same. And although conditions may not be satisfactory, they are at least customary and undisputed.Within a society, social changes is also likely to occur more frequently and more readily in the material aspects of the culture than in the non-material, for example, in technology rather than in values; in what has been learned later in life rather than what was learned early; in the less basic and less emotional aspects of society than in their opposites; in the simple elements rather than in the complex ones; in form rather than in substance; and in elements that are acceptable to the culture rather than in strange elements.Furthermore, social change is easier if it is gradual. For example, it comes more readily in human relations on a continuous scale rather than one with sharp difference. This is one reason why change has not come more quickly to Black Americans as compared to other American minorities,because of the sharp difference in appearance between them and their white counterparts.According to the passage, which of the following is NOT true?A.Social change tends to meet with more difficulty in basic and emotional aspects of society.B.Disagreement with and argument about conditions tend to slow down social change.C.Social change is more likely to occur in the material aspect of society.D.Social change is less likely to occur in what people learned when they were young.
Social change is more likely to occur in societies where there is a mixture of different kinds of people than in societies where people are similar in many ways. The simple reason for this is that there are more different ways of looking at things present in the first kind of society. There are more ideas, more disagreements in interest, and more groups and organizations with different beliefs. In addition, there is usually a greater worldly interest and greater tolerance in mixed societies. All these factors tend to protnote social change by opening more areas of life to decision.In a society where people are quite similar in many ways, there are fewer occasions for people to see the need or the opportunity for change because everything seems to be the same. And although conditions may not be satisfactory, they are at least customary and undisputed.Within a society, social changes is also likely to occur more frequently and more readily in the material aspects of the culture than in the non-material, for example, in technology rather than in values; in what has been learned later in life rather than what was learned early; in the less basic and less emotional aspects of society than in their opposites; in the simple elements rather than in the complex ones; in form rather than in substance; and in elements that are acceptable to the culture rather than in strange elements.Furthermore, social change is easier if it is gradual. For example, it comes more readily in human relations on a continuous scale rather than one with sharp difference. This is one reason why change has not come more quickly to Black Americans as compared to other American minorities,because of the sharp difference in appearance between them and their white counterparts.The passage is mainly discussing__________.A.certain factors that determine the ease with which social changes occurB.certain factors that promote social changeC.the necessity of social changeD.two different societies
共用题干The world has got rainforests which cover 7% of the earth's surface.They grow around the earth's equator in South America,Central America,Africa,Southeast Asia,and Australia. Rainforests are important.(46)______.These rainforests are wet and warm.They get more than two meters of rain each year,and temperatures are usually between 24℃and 27℃．(47)______. Each area has a different environment with different plants,trees and animals.(48)______.Every day a part of the rainforest,the same size as a football field,is destroyed because of human activities.(49)______,people cut down trees to make plantations to grow food,to get minerals or metals out of the ground or to build more and more houses.(50) ______.Cutting down trees must be prohibited and wild animals must be protected.If people break these rules,they must be arrested and severely punished._________（47）A:Therefore strict measures must be takenB:They give the earth oxygen,and are the home for half of the world's animals and plantsC:Because of a growing populationD:Unfortunately,these rainforests are in dangerE:Tropical rainforests are home to tribal peoples who rely on their surroundings for food,shelter,and medicinesF: They are divided into four different areas
Social change is more likely to occur in societies where there is a mixture of different kinds of people than in societies where people are similar in many ways． The simple reason for this is that there are more different ways of looking at things present in the first kind of society． There are more ideas,more disagreements in interest,and more groups and organizations with different beliefs． In addition, there is usually a greater worldly interest and greater tolerance in mixed societies． All these factors tend to promote social change by opening more areas of life to decision． In a society where people are quite similar in many ways, there are fewer occasions for people to see the need or the opportunity for change because everything seetns to be the same． And although conditions may not be satisfactory, they are at least customary and undisputed． Within a society, social change is also likely to occur more frequently and more readily in the material aspects of the culture than in the non-material, for example, in technology rather than in values; in what has been learned later in life rather than what was learned early; in the less basic mad less emotional aspects of society than in their opposites ; in the simple elements rather than in the complex ones; in form rather than in substance; and in elements that are acceptable to the culture rather than in strange elements． Furthermore, social change is easier if it is gradual． For example, it comes more readily in human relations on a continuous scale rather than one with sharp difference． This is one reason why change has not come more quickly to Black Americans as compared to other American minorities, because of the sharp difference in appearance between them and their white counterparts． According to the passage, which of the following is NOT true?A. Social change tends to meet with more difficulty in basic and emotional aspects of society．A. Social change tends to meet with more difficulty in basic and emotional aspects of society．B. Disagreement with and argument about conditions tend to slow down social change．C. Social change is more likely to occur in the material aspect of society．D. Social change is less likely to occur in what people learned when they were young．
根据下列内容，回答206-210题。Social change is more likely to occur in societies where there is a mixture of different kinds ofpeople than in societies where people are similar in many ways. The simple reason for this is thatthere are more different ways of looking at things present in the first kind of society. There aremore ideas, more disagreements in interest, and more groups and organizations with differentbeliefs. In addition, there is usually a greater worldly interest and greater tolerance in mixedsocieties. All these factors tend to promote social change by opening more areas of life to decision.In a society where people are quite similar in many ways, there are fewer occasions for people tosee the need or the opportunity for change because everything seems to be the same. And althoughconditions may not be satisfactory, they are at least customary and undisputed.Within a society, social changes is also likely to occur more frequently and more readily inthe material aspects of the culture than in the non-material, for example, in technology rather thanin values; in what has been learned later in life rather than what was learned early; in the lessbasic and less emotional aspects of society than in their opposites; in the simple elements ratherthan in the complex ones; in form rather than in substance; and in elements that are acceptable tothe culture rather than in strange elements.Furthermore, social change is easier if it is gradual. For example, it comes more readily inhuman relations on a continuous scale rather than one with sharp difference. This is one reason whychange has not come more quickly to Black Americans as compared to other American minorities,because of the sharp difference in appearance between them and their white counterparts.The passage is mainly discussing__________.A.certain factors that determine the ease with which social changes occurB.certain factors that promote social changeC.the necessity of social changeD.two different societies
Software entities are more complex for their size than perhaps any other human construct,because no two parts are alike（at least above the statement level）.If they are,we make the two similar parts into one,a（1）,open or closed.In this respect software systems differ profoundly from computers,buildings,or automobiles,where repeated elements abound.Digital computers are themselves more complex than most things people build;they have very large numbers of states.This makes conceiving,describing,and testing them hard.Software systems have orders of magnitude more（2）than computers do.Likewise,a scaling-up of a software entity is not merely a repetition of the same elements in larger size;it is necessarily an increase in the number of different elements.In most cases,the elements interact with each other in some（3）fashion,and the complexity of the whole increases much more than linearly.The complexity of software is a（an）（4）property,not an accidental one.Hence descriptions of a software entity that abstract away its complexity often abstract away its essence.Mathematics and the physical sciences made great strides for three centuries by constructing simplified models of complex phenomena,deriving,properties from the models,and verifying those properties experimentally.This worked because the complexities（5）in the models were not the essential properties of the phenomena.It does not work when the complexities are the essence.Many of the classical problems of developing software products derive from this essential complexity and its nonlinear increases with size.Not only technical problems but management problems as well come from the complexity.4、____A.surfaceB.outsideC.exteriorD.essential
In CiscoWorks LAN Management Solution， what are some of the examples of a managed device （sometimes called network elements）？ （Choose three.） （）A、 routersB、 LAN switchesC、 PBX switchesD、 TDM switchesE、 appliances
单选题Which of the following datatypes are used in situations where you want an ordered set of data elements, where every element is the same datatype, and where you predefine the number of elements that appear in the set?（）AREF BTABLE CCLOB DVARRAY
单选题If there has been a fire in a closed unventilated compartment it may be unsafe to enter because of （）.Aunburned carbon particlesBexcess nitrogenCa lack of oxygenDexcess hydrogen
单选题The three basic elements necessary for any fire are （）.Aheat, gas, and flamesBfuel, heat, and oxygenCheat, nitrogen, and fuelDfuel oil, nitrogen, and oxygen
单选题ATo examine the chemical elements in the Ice Age.BTo look into the pattern of solar wind activity.CTo analyze the composition of different trees.DTo find out the origin of carbon-14 on Earth.
单选题A work might be made of widely diverse and even discordant elements.AdissimilarBunappealingCunreliableDdistinctive
单选题However fast or slow the combustion rate, it is still a （） between carbon, hydrogen, sulphur and oxygen that releases heat.Aphysical deformationBstate exchangeCchemical reactionDcoalescence
单选题It is stated directly in the passage that older people should _____.Abe treated differently in different culturesBenjoy a similar lifestyleCbe ignored as society changesDbe valued by the younger generations
单选题Why can’t we divide film into various elements for analysis?ABecause these elements are interwoven with each other and cannot be separated without failing to appreciate a film as a whole.BBecause films cannot be written down and it is inconvenient to analyze themCBecause films elements are too complicated.DBecause films need not to be analyzed in detail.
单选题For a continuous operation diesel engine, a duplex filter unit would be the best arrangement because （）.Achanging filter elements would not interrupt engine operationBfiltering occurs twice in each pass of oil through the systemCclogging will not occurDdropping pressure is half of that through a single filter unit
多选题In CiscoWorks LAN Management Solution， what are some of the examples of a managed device （sometimes called network elements）？ （Choose three.） （）AroutersBLAN switchesCPBX switchesDTDM switchesEappliances
单选题People who are closely ______ to each other usually have similar appearances because much of their genetic makeup is shared.ArelatedBrelevantCrelationDreliant