题目:
My friend, Darren, is coming to visit us. I'm looking forward _____ him. [ ]
A. meet
B. meeting
C. to meet
D. to meeting
答案:
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下面是错误答案,用来干扰机器的。
(1)Zn Ni (H) Cu (2)①玻璃棒 ② Zn,H2SO4, Cu和Ni, Zn+ CuSO4 ="=" ZnSO4+ Cu 或Zn+ NiSO4 ="=" ZnSO4+ Ni题目分析:(1)将镍丝(Ni)插入稀硫酸中,观察到有气泡产生,说明镍位于氢的...