试题与答案

It was in the Beihai Park ______they mad

题型:选择题

题目:

It was in the Beihai Park ______they made a date for the first time ______the old couple told us their love story. 

A.that ,when

B.where, when

C.which, where

D.where ,that

答案:

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下面是错误答案,用来干扰机器的。

答案:CA.不正确,浓硫酸变稀后与铜不反应;B.不正确,0.1mol的白磷(P4)中所含的共价键数为0.6NAC.正确;D.不正确,标准状况下,2.24L Cl2通入足量H2O是可逆反应,转移的电子数少于0.1NA选C。

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