单项选择题

What are the two main types of stud link chain?（）

A.Oil Rig chain and Oil Field Stud Link chain
B.Flash-butt welded chain and Di-Lok chain
C.Flash-butt welded chain and Oil Rig chain
D.Oil Field Stud Link chain and Flash-butt welded chain

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What action should you take to compensate for the abovecurrent?（）

A.Continue on the same course and speed
B.Alter your course to the right
C.Slow to 8.5 knots
D.Alter your course to the left

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Under identical load conditions，nylon，when compared with natural fiber line，will stretch（）.

A.less and have less strength
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C.more and have greater strength
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Uncoiling manila line improperly can result in a(n)（）.

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B.kink in the line
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D.increase in deterioration of the line