一份粉尘样品分散度测定结果如下:其中可吸入性粉尘占()
A.65%
B.75%
C.85%
D.90%
E.95%
参考答案:C
介词填空。
1. What ____ something to drink?
2. What's the name ____ the machine?
3. The bottle is full ____ water.
4. Kate is flying the kite. She is running ____ it.
5. A lot of boats pass ____ the bridge every day.
6. My friends often ask me to go to their homes ____ dinner.
7. She is taking off his clothes and going ____ bed.
8. The men are workers. They work ____ the same factory.
9. He comes back ____ five o'clock.
10. Are you children ____ you in China?
维生素无论添加量多少都不会造成毒性作用。