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  3. Mud from a lake on an uninhabited wooded island in northern Lake Superior contains toxic chemicals, including toxaphene, a banne

Mud from a lake on an uninhabited wooded island in northern Lake Superior contains toxic chemicals, including toxaphene, a banne

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问题 Mud from a lake on an uninhabited wooded island in northern Lake Superior contains toxic chemicals, including toxaphene, a banned pesticide for cotton that previously was manufactured and used, not in nearby region of Canada or the northern United States, but in the southern United States. No dumping has occurred on the island. The island lake is sufficiently elevated that water from Lake Superior does not reach it. The statements above, if true, most strongly support which of the following hypotheses?
选项 A、The waters of the island lake are more severely polluted than those of Lake Superior.
B、The toxaphene was carried to the island in the atmosphere by winds.
C、Banning chemicals such as toxaphene does not aid the natural environment.
D、Toxaphene has adverse effects on human beings but not on other organisms.
E、Concentrations of toxaphene in the soil of cotton-growing regions are not sufficient to be measurable.
答案B
解析 本题为“上面段落支持下面哪一个假设”，这种题型大多与归纳题思维一样，但毕竟不完全等于归纳，它比归纳范围要大，这类题有时可以转化为解释现象来考查，即下面哪一个可以解释上面现象的考题。本题指出某岛屿湖泊的泥土里含有Toxaphene，但其制造不在附近区域，也不是从dumping中来，也不是来自于superior湖的水，那么怎么在这个岛屿湖泊泥土里会有Toxaphene?如果Toxaphene是被风带到了这个岛上，正如(B)所说，可以很好地解释上述现象，所以(B)正确。
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