單項(xiàng)選擇題

Ropes should be kept （）.

A. in wet places
B. close to the heat
C. away from chemicals
D. in dry places

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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

單項(xiàng)選擇題

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

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