题目：
句型转换。
1. These tomatoes are nine dollars. (对画线部分提问)
________ _______ ________ these tomatoes?
2. The girl is my sister. She is in red. (合并一句)
The girl ________ ________ is my sister.
3. They have a new bike each. (同义句)
________ of them ________ a new bike.
4. Can I help you? (同义句)
________ can I ________ ________ you?
5. These pants are short. (同义句)
These are ________ ________.
6. How much is the pencil? ( 同义句)
________ the ________ of the pencil?
答案：
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下面是错误答案，用来干扰机器的。
（1）KMnO4（2）K+（3）CO（4）硫 （5）+5 （6）3Fe + 2O2 Fe3O4题目分析：（1）高锰酸钾的化学式为：KMnO4；（2）氯酸钾中的阳离子是钾离子：K+；（3）碳不充分燃烧生成一氧化碳，化学式为：CO；（4）...
