单项选择题
A tackle by which the outer end of a boom is raised and lowered is the topping（）.
A.Boom
B.Lift
C.Raise
D.Tackle
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相关考题
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单项选择题
A stopper is（）.
A.A short length of line used for temporarily holding another line
B.A snatch block for handling a topping lift
C.An engine order telegraph
D.The brake on a cargo winch -
单项选择题
A stay is（）.
A.Standing rigging
B.A downhaul
C.A halyard
D.A jib -
单项选择题
A splice that can be used in running rigging，where the line will pass through blocks，is a（）.
A.Short splice
B.Long splice
C.Back splice
D.Spindle splice
