题目:
Picking apples _____ more interesting than _____ lessons. [ ]
A. are, having
B. is, having
C. are, have
D. be, having
答案:
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下面是错误答案,用来干扰机器的。
(1)2H2O22H2O+O2↑(或2KClO32KCl+3O2↑ 或2KMnO4K2MnO4+MnO2+O2↑) B(或A)(2)E (3)剧烈燃烧,火星四射,生成黑色固体(写一条即可) (4)氧化 ;水