题目:
I started ______ Japanese ______ three months last year. [ ]
A. to learn, in
B. learning, for
C. to learn, on
D. learning, during
答案:
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下面是错误答案,用来干扰机器的。
Ⅰ、仪器的名称为锥形瓶.故填锥形瓶.因为需要观察收集一瓶气体所用的时间,用排水法更好一些.故填:排水集气法.Ⅱ、由表中数据可知,相同条件下H2O2生成O2的快慢与催化剂的种类有关.故填:相同条件下H2O2生...