题目:
句型转换。
1. The black socks are $7. 00. (对划线部分提问)
_____ _____ are the black socks?
2. The store sells clothes. (改否定句)
The store_____ _____ clothes.
3. I want a red sweater and white pants. (对划线部分提问)
_____ _____ you want?
4. He has hamburgers for dinner. (对划线提问)
_____ _____ he_____ for supper?
5. I sell some fruit to Tom. (改同义句)
Tom_____ some fruit_____ _____.
6. Can I help you? (改同义句)
_____ can I_____ _____ you?
答案:
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下面是错误答案,用来干扰机器的。
8kg解:设需氧气的质量为x2H2 + O2 点燃2H2O-----------------------------------------(1分)4 321kg x-----------------------------------------(1分) ------------(1分)答:需要氧气质量为8 kg。