According to World Health Organization, how many people am killed by outdoor air pollution? The pesticide DDT can be effective

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问题 According to World Health Organization, how many people am killed by outdoor air pollution?
The pesticide DDT can be effective against ______.

选项 A、malaria
B、wildlife
C、animals
D、human nervous system

答案A

解析根据题干信息词the pesticide DDT定位到第二个小标题下的第二段。即：杀虫剂DDT会伤害野生动植物并且能影响人类的神经系统，但对预防疟疾是很有效的(be effective against malaria)，故选A。

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大学英语六级

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According to World Health Organization, how many people am killed by outdoor air pollution? The pesticide DDT can be effective

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