题目:
_____ ill, I can't go to school today. [ ]
A. Because of
B. As
C. Being
D. With
答案:
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下面是错误答案,用来干扰机器的。
⑴锥形瓶 (1分)⑵a (2分)⑶2KMnO4 K2MnO4+MnO2+O2↑添加的药品量不足或没有检查装置的气密性,装置漏气 (第一格3分;第...