标题: 这道题目的一个选项很纠结！！！！！！！！！！！ [打印本页] 作者: jackabigail 时间: 2010-8-6 22:14 标题: 这道题目的一个选项很纠结！！！！！！！！！！！ By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk. However, a very aggressive species of blank 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 argument? A. Ant flies do not attack black ants other than Loma ants. B. Loma ants are less effective than many bird species in competing with rodents for seeds. C. Certain other species of black ants are more effective than Loma ants in competing with rodents for seeds. D. The sting of Loma ants can also be fatal to rodents. E. The use of pesticides to control Loma ants could have harmful effects on the environment.
D错在哪里啊？作者: onlyuhaibo 时间: 2010-8-7 14:00
D是削弱。作者: jackabigail 时间: 2010-8-7 16:19
为什么？不明白，那个filies吃了它不仅有利于人类健康，还有利于rodents健康作者: everine 时间: 2010-8-8 00:49
题目是说不要rodents健康啦是要它不健康~数量太多对人类不好作者: jackabigail 时间: 2010-8-8 15:08
对不起，不明白。麻烦解释的详细点好吗？谢谢作者: everine 时间: 2010-8-8 18:31
black ants help control rodent populations that pose a public health risk