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

According to World Health Organization, how many people are 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 are 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 细节题。根据题干信息词The pesticide DDT定位到第二个小标题下的第二段The pesticide DDT does great damage to wildlife and can affect the human nervous system，but can also be effective against malaria(疟疾)，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，故选A。
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