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Man-made air pollution mainly comes from mobile sources.（)
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更多“Man-made air pollution mainly …”相关的问题
Today in Hollywood ______.
A. more television films are produced
B. man-made fighting has completely taken the place of natural light
C. few films are taken for the cinema
D. oil production has become more important than the film industry
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A、ePacket
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A．from water
B．from the air in the sky
C．from the soil
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It was 38 degrees and the air conditioning [barely ]cooled the room.
A.simply
B.quickly
C.hardly
D.strongly
______no air or water, there would be no life in the world.
A. There was
B. There were
C. Is there
D. Were there
Air pollution, together with overpopulation, ______ many problems in big cities today.
A．are causing -
B．is causing
C．are caused
D．is caused
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A．we
B．it
C．which
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C.Purifies the air
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