应急预案是针对重大危险源制定的。专项预案应该包括各种自然灾害及大面积传染病的预案。
参考答案:对
The success of her business made _______tough to carry out her role as wife and mother.
A.that
B.this
C.it
D.her
热轧过程中,钢的金相组织为()
A.马氏体
B.珠光体
C.奥氏体
D.铁素体