（）should be greased every month or two and it should be kept on a reel when not in use.A、Wire ropeB、Hemp ropeC、Nylon ropeD、Wooden rope
题目
（）should be greased every month or two and it should be kept on a reel when not in use.
- A、Wire rope
- B、Hemp rope
- C、Nylon rope
- D、Wooden rope