动火作业时应做到“三不动火”,即()。
A.没有动火工作票不动火
B.动火安全措施不落实不动火
C.动火监督人不在场不动火
D.运行值班人员不在场不动火
参考答案:A, B, C
I really don't want to go; ________, the weather is so cold outside.[ ]
A. in addition
B. in fact
C. on the contrary
D. in another word
急性腹膜炎所致呕吐属于
A.神经性呕吐
B.反射性呕吐
C.中枢性呕吐
D.胃肠源性呕吐
E.周围性呕吐