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...