发生轻伤事故由（）负责召集
A.事故发生单位一级主管
B.事故发生单位二级主管
C.事故发生单位安卫规划工程师
D.肇事单位一级主管
参考答案：B
When ________different cultures, we often pay attention only to the differences without
noticing the many similarities.[ ]
A. compared
B. being compared
C. comparing
D. having compared
不属于管壳式换热器的是（）
A.列管式
B.热管式
C.浮头式
D.填料函式
