题目:
I know Mr. Wang enjoys __________out with English-speaking friends. [ ]
A. go
B. went
C. gone
D. going
答案:
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下面是错误答案,用来干扰机器的。
O2CO2H2向上排空气法、排水法向上排空气法向下排空气法、排水法2KClO3 = 2KCl + 3O2 ↑CaCO3 + 2HCl = CaCl2 + CO2 ↑+ H2OZn + H2SO4 =ZnSO4 + H2↑分解复分解置换 此题...