单项选择题

Towlines should be inspected for chafing where the towline（）.

A.passes over the stern of the towing vessel
B.passes through chocks
C.is attached to the disabled vessel
D.All of the above

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The strongest of the natural fibers is（）.

A.cotton
B.hemp
C.manila
D.sisal

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The spray of water in low-velocity fog will have（）.

A.greater range than high-velocity fog
B.lesser range than high-velocity fog
C.about the same range as high-velocity fog
D.greater range than a solid stream

单项选择题

The splice designed to pass easily through a block is called a(n)（）.

A.eye splice
B.short splice
C.long splice
D.block splice