“三同时”是生产经营单位安全生产的()措施,是一种()保障措施。
A.重要保障事前
B.安全管理安全生产
C.重要保障安全生产
D.安全管理事前
参考答案:A
用所给单词的适当形式填空。
1. Vera has _____ (third) uncles.
2. When is _____(he) father's birthday?
3. My mother's birthday is May _____(five).
4. This is _____ (Mary) room.
5. Her brother is sixteen _____ (year) old.
振动感觉阈值>20V者发生足部溃疡的危险性增加7倍。