单项选择题
Natural fiber rope is made （）the fibers of different plants.
A.up B.from C.of D.with
单项选择题 Wire rope needs （）care than hemp and manila.
单项选择题 （）is the strongest and the most elastic of all the synthetic fiber ropes.
单项选择题 Nylon rope is the strongest and most elastic of all the （）ropes.
