求助几道CR

bunnyfdu2015

1.

Psychologists have studied the impact a person’sattitude has on his ability to accomplish tasks. In one study, a group ofcollege students was outfitted with contraptions designed to administersoothing heat pulses to the students’ neck and shoulder muscles. The studentswere told that the pulses would enhance their performance of in-classassignments. Only half of these contraptions worked, but neither the studentsnor the psychologists were told which students would actually receive thesepulses.This component of the experiment is often frustrated, however, because______
Which one of the following selections, if it is true, completes the sentencemost appropriately?

          

A. frequently the faces of the students who actually  receive the pulses become a little flushed.

  
          

B. students who believe they are receiving the warm  pulses do better on their class assignments.

  
          

C. students who participate in the studies are  volunteers who must told that some of them will not receive the heat pulses.

  
          

D. many students will not complete the experiment if  the sessions last too long.

  
          

E. many of the participating students suffer from  tension headaches which readily respond to the heat pulses

  
选A

2.In a suburban community in the Southeast, neighborhood security guards have their residents’ permission to call local police if anyone is observed entering the home of a resident who is out of town. When residents leave town, they report their departure and return dates to the neighborhood security office. If guards observe someone entering the home of a resident who is out of town, they will immediately call the police. The residential burglary rate for that community has decreased since the implementation of this reporting procedure.
If it is true that the burglary rate has decreased in this community since the reporting procedure was implemented, then which of the following would be most important to know to make sure the conclusion is valid?

A. frequently the faces of the students who actually  receive the pulses become a little flushed.   [/td] [/tr] [tr]  [td]   B. students who believe they are receiving the warm  pulses do better on their class assignments.   [/td] [/tr] [tr]  [td]   C. students who participate in the studies are  volunteers who must told that some of them will not receive the heat pulses.   [/td] [/tr] [tr]  [td]   D. many students will not complete the experiment if  the sessions last too long.   [/td] [/tr] [tr]  [td]   E. many of the participating students suffer from  tension headaches which readily respond to the heat pulses 选A 3.County building inspectors report that almost fifty percent of the homes they inspect are equipped with gauges that monitor carbon monoxide levels. Fifteen years ago, only twenty-five percent of inspected homes were equipped with these gauges. However, even though more homes are now monitored for poisonous carbon monoxide fumes, the total number of homes with confirmed dangerous fume levels is no higher now than it was fifteen years ago because a large proportion of gauges produce false readings. Which one of the following assumptions must be made in order for the author to be correct in drawing the conclusion stated in the passage? A. Thirty percent of the residential carbon monoxide gauges have been installed within the last fifteen years.   B. The number of confirmed dangerous fume readings per year in homes with carbon monoxide gauges has increased in recent years.   C. Not all carbon monoxide gauges report false carbon monoxide fume levels.   D. The percentage of malfunctioning carbon monoxide gauges has increased in the last fifteen years.   E. Properly functioning gauges do not, in themselves, decrease the risk that dangerous carbon monoxide fumes will enter people’s homes.                                                                选D

山贼的头头

你实际只给了两题，第一题原文强调的是soothing heat pulses(只能大概看下,句子不是很清楚)而A削弱了sooth这个词.
最后一题我果断排除了ab，e说的是properly functioning gauges就是好的那部分减少了有害燃料,但不能推出inspector的malfunctioning gauge所以错。c强调的是some report 正确的,some report 不正确的， 但没有说这两个谁多谁少，推不出结论。D明确说report不正确的多，因此可以推出结论。