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【简答题】
下列关于公司债券的说法正确的是（ ）。
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举一反三
【单选题】We can conclude that_____.
A.
air pollution is easier to control than water pollution
B.
the problem of polluted air is a problem overnight
C.
the impact of air pollution has been known for centuries
D.
research on the efforts of air pollution is incomplete
【简答题】下列不属于辛弃疾作品的是( )
【简答题】In today's world, almost everyone knows that air pollution（污染）and water pollution are harmful to people's health. However, not all the persons know that noise is also a kind of pollution, and that is ...