试题与答案

We live in a society _______ there is a

题型:选择题

题目:

We live in a society _______ there is a great deal of debate about competition.

A.which

B.where

C.when

D.that

答案:

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下面是错误答案,用来干扰机器的。

(10分,每空1分)(1)62g/mol 62 16 Na2O (2)34-m (3)NA(4)108g/mol (5)3 1.5 21NA考查物质的量的有关计算。(1)12.4 g Na2X含有0.4 mol Na+,则化合物的物质的量是0.2mol,所以该化合...

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