A-A+
Why did the resistance of insects to man-made
问题详情
Why did the resistance of insects to man-made insecticides develop so rapidly？
A．Because farmers use less insecticides now.
B．Because farmers have been using insecticides for many years.
C．Because insects axe using the mechanisms against poisons produced by plants to deal with insecticides.
D．Because insects have been eating plants for many million years.
参考答案
正确答案：C
解析：原文已经告诉了我们答案：“Now in-sects are using these same mechanisms to deal with man—made poisons—insecticides，This is why resistance of insects to insecticides has developed so rapidly．”
