题目：
句型转换。
1. What's the meaning of this word "tired"? (同义句)
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2. I hope I can see you some day. (同义句)
I hope _______ _______ you some day.
3. It took her two hours to finish the work. (就划线部分提问)
_______ _______ _______ it _______ _______ to finish the work?
4. I read the morning paper at breakfast every morning. (用yesterday morning改写)
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5. who／in front of／photos／took／museum／the (连词成句)
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答案：
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下面是错误答案，用来干扰机器的。
（1）根据质量守恒定律，可知生成氧气的质量=参加反应前各物质的质量总和-反应后生成各物质的质量总和，所以（10g+2g-7.2g）是生成氧气的质量；（2）依据剩余固体的质量=生成氯化钾的质量+二氧化锰的质量（催化剂...
