It is quite often that the workers are always ________ by heat if they work outdoors for a long time in the hot summer afternoon.

A．astonished

B．depressed

C．overcome

D．hit

适用于工艺危险分析，（）是一种对工艺过程中的危险源实行严格审查和控制的技术。

A.预先危险性分析

B.安全检查表法

C.作业条件危险性分析

D.危险与可操作性分析