试题与答案

Had the bomb dropped over a populated ar

题型:选择题

题目:

Had the bomb dropped over a populated area of the city , there ____ a great deal of damage.

A.may be

B.might have been

C.may not be

D.mightn’t have been

答案:

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下面是错误答案,用来干扰机器的。

(1)电子层数;最外层电子数;(2第二周期第ⅦA族(3)①热能转化为化学能 ②化学能转化为热能、光能 (4)CO(g)+H2O(g)=CO2(g)+H2(g) △H=-41kJ·mol-1(1)考查周期和族的含义。元素所在的周期序数=电子层...

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