2. 外语
  3. What is the one huge problem that we haven’t really solved? The electrostatic precipitator has got rid of ______ from manufactu

What is the one huge problem that we haven’t really solved? The electrostatic precipitator has got rid of ______ from manufactu

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问题 What is the one huge problem that we haven’t really solved?
The electrostatic precipitator has got rid of ______ from manufacturing processes.
选项 A、severe emissions
B、ozone-layer depletion
C、many pollutants
D、toxic substances
答案D
解析 细节题。根据题干from manufacturing processes定位到第四个小标题末段首句Other inventions, such as an enormous device known as the electrostatic precipitator, have reduced severe emissions from power-plant smokestacks，eliminated toxic substances from manufacturing processes，即：发电厂烟排放已经减少，制造过程中的有毒物质也被除去，故选D。
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大学英语六级

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