绞车提升钢丝绳要求每天至少检查（）次，检查的项目主要是断丝、磨损、锈蚀和（）。
参考答案：一；变形
The deadweight of a bulk carrier consists of（）.
A.the weight of the ship's structure and its machinery
B.bunker and other consumable loads
C.ballast loads
D.all those weights，such as the weight of the bunkers，ballast，provisions and cargo
水箱的配管上不装阀门的有（）。
A.进水管
B.出水管
C.溢流管
D.信号管
