重量分析中使用的滤纸分（）滤纸和（）滤纸两种，重量分析中常用（）滤纸进行过滤，又称为（）滤纸.
参考答案：定性；定量；定量；无灰
完成句子
1. Mistakes,__________ (如果有的话),should be corrected.
2. Henry looked about_________ (似乎在寻找什么)．
3. She studies very hard_______ (尽管体弱)．
4. -Would you like to come to the paty?
-_________ (是的,我愿意)．
5. He was late because he had overslept and________ (误了火车)．
6. _______ (如果他早接受我的建议的话),he would have succeeded.
7. It is suggested that we__________ (去看电影)．
8. He didn't come,but he _______ (应该来)．
9. It's a waste of time________ (和他争论)．
10. -He will retum at the weekend.
-________ (恐怕不能)．
额定速度2.0m/s的曳引式电梯，轿厢限速器的动作速度应在（）之间。
A.2m/s～2.5m/s
B.2.3m/s～2.625m/s
C.2.5m/s～2.7m/s
