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A year after the start an experiment to decrease crime in two high-crime subway stations by the installation of closed-circuit televisions, the experiment is being discontinued, city officials say the program has led to an increase in crime, citing the fact that following the installation, both stations showed increases in the number of crimes reported.

Which of the following, if true, most seriously weakens the claim of the city officials that the program has led to an increase in crime?

(A) The two subway stations had been chosen on the basis subway stations was higher than that of other high-crime subway stations not equipped with closed-circuit-television.

(B) The rate of increase in crimes reported for two subway stations was higher than that of other high-crime subway stations not equipped with closed-circuit television.

(C) The percentage of all crimes committed at the two subway stations that were reported rose as a result of increased instances of observations of crime on the closed-circuit televisions.

(D) The year in which the experiment was conducted was a year in which the total number of crimes reported in the city fell.
C

(E) Closed-circuit televisions installed in shops and stores throughout the city have proved to be useful in the prevention of shoplifting and burglaries.

C属于给出他因的削弱吗?  我选E,我觉得这个是直接否定证据。
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A year after the start an experiment to decrease crime in two high-crime subway stations by the installation of closed-circuit televisions, the experiment is being discontinued, city officials say the program has led to an increase in crime, citing the fact that following the installation, both stations showed increases in the number of crimes reported.
Which of the following, if true, most seriously weakens the claim of the city officials that the program has led to an increase in crime?
(A) The two subway stations had been chosen on the basis subway stations was higher than that of other high-crime subway stations not equipped with closed-circuit-television.
(B) The rate of increase in crimes reported for two subway stations was higher than that of other high-crime subway stations not equipped with closed-circuit television.
(C) The percentage of all crimes committed at the two subway stations that were reported rose as a result of increased instances of observations of crime on the closed-circuit televisions.
C选项最好 因为它把这两个地方reported的犯罪的上升与安装闭路电视联系这个原因起来,实际上犯罪的数量并没有增加,只是被闭路电视拍下来的多了
(D) The year in which the experiment was conducted was a year in which the total number of crimes reported in the city fell.(C)
(E) Closed-circuit televisions installed in shops and stores throughout the city have proved to be useful in the prevention of shoplifting and burglaries.
1.E说的是shop和store,这些地方犯罪的减少并不能反应在Subway一定减少
2.犯罪的表现形式不仅仅只有shoplifting和burglaries
这个选项虽然是否定证据,但否定的不全面
C直接说出来了犯罪没有增长,是安了闭路电视的原因导致被拍下来的犯罪增长了。可能原来犯罪的更多,只不过没有被拍下来而已。

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恩 谢谢 原来是阅读错误。。。

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