采用机动绞磨起吊1.5T的电杆,应选用承重能力不小于()T的滑车组
A.5
B.7
C.8
D.9
参考答案:D
渗沟的开挖宜自下游向()行应随挖随即支撑并迅速回填。
A.中游
B.任意方向
C.上游
Each crewmember has an assigned firefighting station. This assignment is shown on the().
A.fire fighting plan
B.shipping articles
C.Certificate of Inspection
D.muster list