题目内容
（请给出正确答案）
A．They cannot sleep well.
B．They cannot eat well.
C．They tend to bite each other.
D．They tend to reproduce more.
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更多“A．They cannot sleep well.B．The…”相关的问题
Passage One
How much living space does a person need？ What happens when his space requirements are not adequately met？ Sociologists and psychologists are conducting experiments on rats to try to determine the effect of overcrowded conditions on man. Recent studies have shown that the behavior. of rats is greatly affected by space. If rats have adequate living space, they eat well, sleep well, and reproduce well. However, if their living conditions become too crowded, their behavior. patterns and even their health perceptibly change. They cannot sleep or eat well, and signs of fear and tension become obvious. The more crowded they are, the more they tend to bite each other and even kill each other. Thus for rats, population and violence are directly related. Is this a natural law for human society as well？ Is adequate space not only desirable, but also essential for human survival？
This passage is mainly about ______.
A.living space and behavior
B.population and living conditions
C.interesting experiments on rats
D.a natural law for human society
What is the purpose of the experiments described in the passage？A.To determine how much living space a rat needs.
B.To see what happens when rats live in a limited space.
C.To know the likely effects of inadequate living space on human beings.
D.To find out the relationship between population and living conditions.
The passage suggests that overcrowded conditions ______.A.are directly related with population
B.may cause an increase in violence
C.may lead to high birth rate
D.may bring about pollution problems
How would rats behave when their living conditions become too crowded？A.They eat a lot and become friendly to others.
B.They sleep little and act quite peacefully.
C.They eat little but sleep soundly.
D.They become nervous and tend to be war-like.
请帮忙给出每个问题的正确答案和分析，谢谢！
According to one resident, they are short of sleep because ______.
A．they are kept by treating their patients
B．they are forbidden to sleep at work
C．they are too tired to fall asleep
D．they are too worried about oversleeping
According to one resident, they are short of sleep because ______.
A．they are too tired to fall asleep
B．they are forbidden to sleep at work
C．they are kept by treating their patients
D．they are too worried about oversleeping
A．They will stop breathing.
B．When they wake up, it's hard for them to go back to sleep again.
C．It can happen several hundred times one night.
D．In the morning, they will remember waking up.
According to the passage, birds often half sleep because _________.
A．they have to watch out for possible attacks
B．their brain hemispheres take turns to rest
C．the two halves of their brain are differently structured
D．they have to constantly keep an eye on their companions
Which of the following is NOT a symptom of insomnia？
A．They can"t sleep as much as they try.
B．They have a true sleep disorder.
C．They can"t sleep enough because of the health condition.
D．They don"t have time to sleep.
Does Peggy care about the noise in Woodside Road？
A．Yes, because she cannot sleep well.
B．Yes, because she cannot concentrate on her study.
C．No, because she would be out all day.
D．No, because she cannot hear it.
The stories about scientists who solve difficult problems during sleep show that ______.
A．they are still working when they are sleeping
B．difficult problems will become easier in one's sleep
C．a person's mind can still be active when he is asleep
D．all difficult problems can be worked out during sleep
A．They cannot sit still or control their actions.
B．They cannot talk fluently.
C．They cannot study well.
D．They cannot express their ideas well.
A．Importance of A Good Night's Sleep
B．The Best Things Money Cannot Buy
C．Taking Good Care of Oneself
D．How to Enjoy Life Thoroughly
