古代文化典籍分为哪六类？

压力容器的安全附件有（）温度计等。

A、安全阀

B、切断阀

C、压力表

D、液位计

Some social workers _____ after the people in need while others ____ out food to the local people.

A．looked, gave

B．were looking, gave

C．were looking, were giving

D．looked, were giving

道德品质是消极适应某种世俗风情而自然形成的一般生活习惯和习性。

假设进程号是11562，用来结束读进程的命令是（）。

安全生产的岗位要求是什么（）

A.遵章守纪

B.风险预控

C.消除隐患

D.建立机制