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單項(xiàng)選擇題

It is more economical to use （）, because of their greater strength and longer useful lives.正確答案A

A. nylon ropes
B. manila ropes
C. sisal ropes
D. wooden ropes

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單項(xiàng)選擇題

Natural fiber rope is made （）the fibers of different plants.

A.up
B.from
C.of
D.with

單項(xiàng)選擇題

Wire rope needs （）care than hemp and manila.

A.good
B.well
C.better
D.best

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