No botanist lives long enough to study the complete life cycle of an individual California redwood tree. Nevertheless, by observing many trees at different stages, botanists can piece together the evolution of a single tree. Exactly the same principle applies in astronomy to the study of the life-story of globular clusters, huge spherical aggregations of about a million stars all swarming about each other. Which of the following is an assumption made in the passage above
A. The methods of scientists in one field generally carry over to other fields even if the subject matter is vastly different.
B. Observations of the life cycle of a single individual have little value in scientific studies.
C. Globular clusters at different stages of development are accessible to astronomers for observation and study.
D. There are globular clusters that have not so far been detected by astronomers.
E. Redwoods and globular clusters must both be studied intensively now, while they still exist in sufficient numbers.
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Some people assert that prosecutors should be allowed to introduce illegally obtained evidence in criminal trials if the judge and jury can be persuaded that the arresting officer was not aware of violating or did not intend to violate the law while seizing the evidence. This proposed "good-faith exception" would weaken everyone’s constitutional protection, lead to less careful police practices, and promote lying by law enforcement officers in court. The argument above for maintaining the prohibition against illegally obtained evidence assumes that
A. defendants in criminal cases should enjoy greater protection from the law than other citizens do.
B. law enforcement authorities need to be encouraged to pursue criminals assiduously.
C. the legal system will usually find ways to ensure that real crimes do not go unprosecuted.
D. the prohibition now deters some unlawful searches and seizures.
E. courts should consider the motives of law enforcement officers in deciding whether evidence brought forward by the officers is admissible in a trial.
灰线抹灰的式样较多，线条有简有繁，形状有大有小，各种灰线所使用的材料也根据设计要求和灰线所在部位的不同而有所区别。( )
A. 对
B. 错
In any negotiations between a party with limited aims and an opposing party with unlimited aims, the party with limited aims is bound to lose. This is so because the scope of a negotiating party’s aims determines the energy and the perseverance that will be brought to the negotiations by that party. Which of the following is an assumption implicit in the passage above
A. The intensity with which parties conduct negotiations affects the outcome of those negotiations.
B. Negotiations almost always pit against one another parties whose aims differ in scope.
C. The outcome of negotiations cannot be correctly predicted in advance.
D. A negotiator who has exceptionally high aims needs exceptional perseverance in order to avoid losing.
E. Negotiating parties are typically not aware of the scope of each other’s aims until the outcome is no longer in doubt.
The number of hospital emergency room visits by heroin users grew by more than 25 percent during the 1980s. Clearly, then, the use of heroin rose in that decade. The author’s conclusion is properly drawn if which one of the following is assumed
A. Those who seek medical care because of heroin use usually do so in the later stages of addiction.
B. Many heroin users visit hospital emergency rooms repeatedly.
C. The number of visits to hospital emergency rooms by heroin users is proportional to the incidence of heroin usage.
D. The methods of using heroin have changed since 1980, and the new methods are less hazardous.
E. Users of heroin identify themselves as such when they come to hospital emergency rooms.
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