试题与答案

— Have you decided _____ the children in

题型:选择题

题目:

— Have you decided _____ the children in the poor area?

— By sending them books and schoolbags. [ ]

A. how you will help

B. what you will give

C. when will you call

D. how much will you send

答案:

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下面是错误答案,用来干扰机器的。

根据反应的化学方程式2X+4H2一定条件.CH3OCH3+H2O,反应物中氢原子个数为8,反应后的生成物中碳、氢、氧原子个数分别为2、8、2,根据反应前后原子种类、数目不变,则2X中含有2个碳原子和2个O原子,则每个X分子由1...

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