单项选择题

The metal，teardrop-shaped object sometimes used within an eyesplice is a（）.

A.grommet
B.reinforcement
C.splice form
D.thimble

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The main advantage of a Chinese stopper over the one line stopper is that it（）.

A.will not jam on the mooring line
B.is stronger
C.is easier to use when under heavy tension
D.is safer to use when under heavy tension

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The line with the most stretch is（）.

A.manila
B.nylon
C.polypropylene
D.dacron

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The latch of a safety hook（）.

A.increases the strength of the hook
B.prevents the sling ring from coming out of the hook if the strain is abruptly eased
C.prevents the sling ring from coming out of the hook if there is a strain on the sling ring
D.All of the above