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问题 综合

读下边经纬网示意图，回答问题：

（1） 读出A点的经纬度：经度____________；纬度______________。

（2） A、B、C、D四点中，位于西半球的是___________。 地处中纬度地区的是_______________。

答案

（1）20°W      60°N

（2）B      D

单项选择题

If Blankenship Enterprises has to switch suppliers in the middle of a large production run, the company will not show a profit for the year. Therefore, if Blankenship Enterprises in fact turns out to show no profit for the year, it will also turn out to be true that the company had to switch suppliers during a large production run.
The reasoning in the argument is most vulnerable to criticism on which one of the following grounds

A．The argument is a circular argument made up of an opening claim followed by a conclusion that merely paraphrases that claim.

B．The argument fails to establish that a condition under which a phenomenon is said to occur is the only condition under which that phenomenon occurs.

C．The argument involves an equivocation, in that the word "profit" is allowed to shift its meaning during the course of the argument.

D．The argument erroneously uses an exceptional, isolated case to support a universal conclusion.

E．(E) The argument explains one event as being caused by another event, even though both events must actually have been caused by some third, unidentified event.
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单项选择题

某化合物的分子式是CO，其中碳元素和氧元素的质量比为3：8，则z的数值是（）。

A.1

B.2

C.3

D.4
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