题目内容
（请给出正确答案）
A．When on normal duty.
B．Whenever they go out.
C．When chasing a drug smuggler.
D．When chasing an armed criminal
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更多“A．When on normal duty.B．Whenev…”相关的问题
If you are HIV positive, you may have a normal day______.
A．when you forget the infection
B．even when you suddenly remember the infection
C．when you are hit in the face
D．when you are not going crazy
1打开电源，启动PC，进入测试界面2确认DUT板、数据线连接正确3打开测试程序4设置参数：选择与待测芯片对应的测试卡，并调用相应的测试程序5打开测试主机电源，此时PC上会显示系统初始化
A.②①③④⑤
B.②①⑤③④
C.②①③⑤④
D.②⑤①③④
The females in the rat population were the most seriously affected by the high population density. For example, mothers sometimes abandoned their pups, and, without their mothers' care, the pups died. The experiments verified that in overpopulated communities, mother rats do not behave normally. Their behavior. may be considered diseased, pathological (病理学的).
The dominant males in the rat population were the least affected by overpopulation. Each of these strong males claimed an area of the enclosure as his own. Therefore, these individuals did not experience the overcrowding in the same way as the other rats did. However, dominant males did behave pathologically at times. Their antisocial behavior. consisted of attacks on weaker male, female, and immature rats. This deviant (不正常的) behavior. showed that even though the dominant males had enough living space, they too were affected by the general overcrowding.
Non-dominant males in the experimental rat communities also exhibited deviant social behavior. Some withdrew completely, avoiding contact with other rats. Other non-dominant males were hyperactive, chasing other rats and fighting each other.
The behavior. of the rat population has parallels in human behavior. People in densely populated areas exhibit deviant behavior. similar to that of rats in Calhoun's experiments. In large urban areas, such as New York City, London, and Cairo, there are abandoned children. There are cruel, powerful individuals, both men and women. There are also people who withdraw and people who become hyperactive. Is the principal cause of these disorders overpopulation？ Calhoun's experiments suggest that it might be. In any case, social scientists and city planners have been influenced by the results of this series of experiments.
Calhoun stabilized the rat population ______.
A．when it was double the number that could live in the enclosure without stress
B．by removing young rats
C．so that there was a constant number of adult rats in the enclosure
D．all of the above are correct
A．When they are born.
B．When they are ten months old.
C．When they are one year old.
D．When they are two years old.
A．when purchasing
B．when purchased
C．when purchase
D．which purchased
