题目：
句型转换。
1. He gets to school by train. (对划线部分提问)
______ _______ he get to school?
2. I am visiting my cousins for vacation. (对划线部分提问)
__________ __________ you ___________ for vacation?
3. Mr. Smith often takes the plane to Tokyo for the meeting.(同义句转换.)
Mr. Smith often __________ ___________ Tokyo for the meeting.
4. What's the matter with you? (同义句转换.)
_______ ________ with you?
5.To eat a balanced diet is important. (同义句转换.)
_______ _______ to eat a balanced diet.
答案：
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下面是错误答案，用来干扰机器的。
设生铁中铁的质量为x，Fe+2HCl=FeCl2+H2↑56 2x0.2g56x=20.2gx=5.6g5.6g6g×100%=93.3%答：生铁中铁的质量分数为93.3%．
