题目内容
（请给出正确答案）
Air pollution can be as harmful to one's health___________
A When you get up
B Where you stand while waiting to cross a road
C Where you walk
D Where you sit on a bus and how you travel
E When you go to bed
F When pollution levels rise and fall
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更多“Air pollution can be as harmfu…”相关的问题
Air pollution can be as harmful to one\\\\\\\'s health___________
A．on the downwind side
B．during rush hours
C．in spring and autumn
D．to toxic air
E．between autumn and winter
F．as exposure to nuclear radiation
There is a U. N. convention that can cover ______.
A．problem between neighbors
B．problem between states which do not share a border
C．problems on air pollution
D．trans-boundary air pollution
A．supportive
B．objective
C．critical
D．unclear
How can students detect air and water pollution？
A．They look for mosses and lichens and draw the conclusion according to the number and quality of the species.
B．They go to the fields to measure the quality of air and water.
C．They set up experiments to investigate the substances in air and water.
D．They look for several kinds of species in the field, produce diagrams and draw conclusions.
In what way can naturalpollutants play an important role in controlling air pollution？
A.They function as part of a purification process.
B.They are dwarfed by the pollutants produced by human activities.
C.They are less harmful to living beings than are other pollutants.
D.They have existed since the Earth developed.
The passage mainlydiscusses _________
A.the economic impact on air pollution
B.how much damage air pollutants can cause
C.what constitutes an air pollutant
D.the quantity of compounds added to the atmosphere
In what way can natural pollutants play an important role in controlling air pollution？
A.They function as part of a purification process.
B.They are dwarfed by the pollutants produced by human activities.
C.They are less harmful to living beings than are other pollutants.
D.They have existed since the Earth developed.
27 Air pollution can be as harmful to one's health___________
28 Traveling on an underground train can reduce exposure___________
29 Pollution levels are lower__________
30 It's wise to stay away from heavy traffic____________
A on the downwind side
B during rush hours
C in spring and autumn
D to toxic air
E between autumn and winter
F as exposure to nuclear radiation
根据下列阅读材料，回答 41～45 题：
第 41 题 That boys suffer more from air pollution can possibly be justified by the fact that __________.
The passage mainly discusses
A.the economic impact on air pollution
B.how much damage air pollutants can cause
C.what constitutes an air pollutant
D.the quantity of compounds added to the atmosphere
