题目内容
（请给出正确答案）
Air pollution is the most serious kind of pollution because ______.
A．it's bad for all living things in the world
B．it makes much noise
C．it makes our rivers and lakes dirty
D．it makes us angry more easily
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更多“Air pollution is the most seri…”相关的问题
The purpose of the passage is to ______.
A．describe the harmful air pollution
B．explain the way to prevent air pollution
C．recommend a method to avoid air pollution
D．show the worries about the air pollution
A、water pollution
B、air pollution
C、land pollution
D、light pollution
What is the passage mainly about？
A．How to fight air pollution in big cities.
B．How to avoid air pollution in big cities.
C．How to breathe fresh air in big cities.
D．How serious air pollution is in big cities.
The air pollution exceeds most ________ levels by 10 times or more.
A acceptable
B accessible
C available
D applicable
The ______ system is used to reduce the air pollution caused by the engine.
A lubricating
B emission control
C starting
D ignition
A.won’t it
B.will it
C.has it
D.does it
Air pollution is as damaging as light pollution．
A．Right
B．Wrong
C．Not mentioned
Every possible means(use)______ to prevent the air pollution, but the sky is still not clear.
Air pollution causes airplane accidents because ______.
A．pilots become ill
B．visibility is reduced
C．engines fail.
D．the air is too hot
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