2. 职称英语
  3. We can eliminate pollution completely by the year of 2008. [br] Controlling air

We can eliminate pollution completely by the year of 2008. [br] Controlling air

游客2023-09-17  20
问题 We can eliminate pollution completely by the year of 2008. [br] Controlling air pollution is another crucial objective; ______devices can reduce the harmful gases emitted from the engine.
选项
答案 pollution-control
解析 第10段倒数第2句，有必要在汽车尾部安装控制污染的装置来减少污染。
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