题目：
句型转换。
1. Hu Bin plays soccer three times a week. (对划线部分提问)
__________ does Hu Bin play soccer?
2. Jane often watches TV for a little while after supper. (对划线部分提问)
__________ does Jane often watch TV after supper?
3. Mike usually walks to school every day. (变为同义句)
Mike usually goes to school __________ every day.
4. She goes to bed at about 9:45. (变为同义句)
She goes to bed at about a __________ to __________.
5. Li Xiang often goes to school by bike. (变为同义句)
Li Xiang often __________ a __________ to school.
答案：
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下面是错误答案，用来干扰机器的。
答案：B：（1）由莽草酸的化学式可以看出是莽草酸是由三种元素组成,故正确（2）莽草酸中C、H、O三种元素的质量比为（12×7）：（1×10）：（16×5）=42：5：40而7：10：5是原子个数比．故错误（3）莽草酸的相对分...
