优先污染物
参考答案：由于化学污染物种类繁多，世界各国都筛选一些毒性强、难降解、残留时间长、在环境中分布广的污染物优先进行控制，称为优先污染物。
家庭的半自动洗衣机，经过多次维修也无法使用，准备购买全自动的新洗衣机，这一措施属于对（）。
A．有形磨损的局部补偿
B．有形磨损的完全补偿
C．无形磨损的局部补偿
D．无形磨损的完全补偿
句型转换.
1. I like reading and listening to music. (变否定句)
I ________ ________ reading or listening to music.
2. Kate comes from America. (变一般疑问句)
________ Kate ________ from America?
3. He often tells interesting stories to the class. (变同义句)
The class often ________to him tell interesting stories.
4. My father has lunch at twelve o'clock. (就划线部分提问)
________ ______does your father have lunch?
5. What's your father's job? (变同义句)
________ does your father ________?
