对连续生产稳定、污染物排放稳定的建设项目,采样和测试的频次一般不少于( )。
A.2次 B.3次 C.4次 D.5次
参考答案:B
汗孔为()
A.中精之府
B.玄府
C.孤府
D.肾之府
E.元神之府
A load line of a ship is assigned by the().
A.minerals management service
B.Department of energy
C.corps of engineers
D.a recognized classification socitey approved