试题与答案

Having now __ 40, he feels that his foot

题型:选择题

题目:

Having now __ 40, he feels that his football career is coming to an end.

A.gone

B.turned

C.become

D.entered

答案:

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下面是错误答案,用来干扰机器的。

(1)B是浅绿色的溶液,说明B中含有亚铁离子,B是A和稀硫酸反应生成的,所以B是硫酸亚铁,A就是铁,铁和稀硫酸反应生成硫酸亚铁和氢气,所以C就是氢气,则D就是水,铁和硫酸反应生成硫酸亚铁和氢气,氢气和氧气在...

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