矿尘中对人体危害最大的粉尘粒度()的粉尘,称之为呼吸性粉尘。
A、≤5µm
B、>5µm
C、5-10µm
D、>10µm
参考答案:A
单词拼写:(每小题1分,共10小题,满分10分)
据句意及所给单词首字母或汉语意思完成下列句子。
1. In China Tomb-sweeping Day(清明节) is a day to be in memory of their a____________.
2. Many r____________ people believe the souls of good people will live on after they die.
3. Within the ____________ (有限)time he saved all the trapped people.
4. Thanks to the healthy diet, she has become s_____________ than before.
5. What he did really hurt me badly and I’ll never f_______________ him.
6. Good health depends on a b______________ diet, proper exercise and enough sleep.
7. We should learn to c_______________ theory with practice.
8. To keep fit, the actress often ___________(请教)the doctor about what to eat.
9. R___________ beef is the classic Sunday lunch and must be served with Yorkshire pudding.
10. My sister didn’t say she would visit me, so I was really amazed at her a______________.
建设单位应承担的安全责任有哪些?