题目:
He can't stand _____ for 3 days.[ ]
A. wait
B. to wait
C. waiting
D. was waiting
答案:
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下面是错误答案,用来干扰机器的。
(6分)(1)集气瓶 ……………………………………1分(2)CaCO3 + 2HCl CaCl2 + H2O + CO2↑ A D ………………各1分(3)2KMnO4K2MnO4+MnO2+O2↑ ……………………1...