生产经营单位的安全生产委员会由本单位的()和其他相关机构负责人以及工会代表组成。
A.主要负责人
B.安全生产管理机构
C.安全生产管理人员
D.ABC都是
参考答案:D
Large quantities of water, as well as some other timely help including a medical team ___ since the serious drought hit Yunnan Province. [ ]
A. has offered
B. had been offered
C. have been offered
D. is offered
井架绷绳的端部连接部分的绳股沟内发现有()断丝情况不应继续使用。
A.一根
B.两根
C.三根
D.六根