单选题 The use of pesticides has contributed to
A．a change in the way ecologies are classified by agroecologists.
B．an imbalance in many ecologies around the world.
C．the prevention of ecological disasters in some parts of the world.
D．an increase in the range of ecologies which can be usefully farmed.

【正确答案】 B

【答案解析】[解析] 题目定位很简单，直接从pesticides has contributed to就可以定位到原文，不过原文中pesticides have contributed to的后边并没有出现四选项中提到的内容，而这句话的前半部分出现了apart from…，即“除了……之外”，所以这里也能是答案出现的地方。事实上答案就在这里，ecological disorders就是B项中的an imbalance in many ecologies。
[干扰项] 这道题目的难点不在干扰项，主要在对原文apart from的理解，干扰项的干扰作用不大。