机电工程施工总承包单位在施工现场的内部协调管理活动是通过（）实施的。
A．项目经理
B．监理工程师
C．项目经理部
D．监理单位
参考答案：C
用所给词的适当形式填空。
1. I enjoy _ (swim) in the river.
2. The best way of learning English is by (use) it.
3. A good language (learn) should have lots of practice.
4. When I hear the _ (exciting) news, we all got _ (excite).
5. His father was very _ (frustrating) because he was always for school.
BH002公称直径小于（）的液体管道，宜釆用水冲洗。
A.500mm
B.700mm
C.600mm
D.400mm
