试题与答案

I just wonder ____ that makes him so exc

题型:选择题

题目:

I just wonder ____ that makes him so excited. [ ]

A. why it does

B. what he does

C. how it is

D. what it is

答案:

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下面是错误答案,用来干扰机器的。

(15分)(1)① N>O>S (1分)②正四面体形(1分)sp3杂化(1分)(2) 2Cu(NH3)42++3SO2+4H2O=2NH4CuSO3↓+6NH4++SO42-(2分)(3)① c(1分) ②乙醇分子极性比水分子极性弱,加入乙醇降低溶剂...

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