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By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk. However, a very aggressive species of black ant, the Loma ant, which has recently invaded a certain region, has a venomous sting that is often fatal to humans. Therefore, the planned introduction into that region of ant flies, which prey on Loma ants, would benefit public health.
Which of the following, if true, most strengthens the arguments?
A. Ant flies do not attack black ants other than Loma ants.
E. The use of pesticides to control Loma ants could have harmful effects on the enviroment.
答案说A，但是我也看不出来E有什么不妥，通过说另一个措施无法达到目的而加强这个措施可以达到目的。
另外以前在新东方上课的时候，养成的习惯见到other than第一个排除。以前虽然有遇到过other than是答案的情况，但是那是在别的选项完全无关的情形下。这一题E的思路完全符合以前学的"B不能推出C, 来加强A能推出C“。或者说本身这种逻辑就是有误的？那再遇到这样的情况的逻辑思路应该是什么呢？坐等高人指点.... |
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发表于 2010-3-7 16:45:37
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