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  3. Our earth has been threatened by all kinds of pollutions.Acid rain is a kin

Our earth has been threatened by all kinds of pollutions.Acid rain is a kin

游客2023-09-11  71
问题     Our earth has been threatened by all kinds of pollutions.
Acid rain is a kind of air pollution which is hanging
over our heads and coming down from many different                  【S1】______
ways such as rain and snow. It damages forests, lake and            【S2】______
rivers, buildings and even human health. Several
chemicals, including of sulfur dioxide, nitrogen                    【S3】______
oxides and ozone, are involved in causing acid rain.
These chemicals either come directly from power
station chimneys and cars, and are formed from a                    【S4】______
combination of pollutant gases. Sulfur dioxide is the
one chemical what is often associated with acid rain.               【S5】______
It is mainly emitted by large coal burning power
stations. It affect places thousands of miles away as               【S6】______
well as areas around the power stations. To prevent
more or worse environmental effects from acid rain,                 【S7】______
we have short-term and long-term solutions. We should               【S8】______
just clean up our power station chimneys and car exhausts.
We should also change the way society thinks and reacts.
We need to conserve energy by decreasing efficiency.                【S9】______
We also need to change our way of transport, that is,
create a more efficient transport system which
depends less on private cars and more a good public                 【S10】______
transport network. Everybody should work together
to save the world. [br] 【S9】
选项
答案 decreasing→increasing
解析 根据逻辑关系，此处意思为“提高效率”。
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