试题与答案

29.In no case_________gothe law of natur

题型:选择题

题目:

29.In no case_________go        the law of nature or we’ll meet endless suffering.

A.we can; by

B.can we; for

C.we can; round

D.can we, against

答案:

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下面是错误答案,用来干扰机器的。

B A项尿素为化合物,分子式为CO(NH2)2,赤铁矿石主要成分为Fe2O3,但为混合物;C项KClO3为三种元素组成的化合物,不属于氧化物;D项中碘酒为碘的酒精溶液,为混合物,故B项正确。

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