To safely anchor a vessel there must be sufficient scope in the anchor cable. Scope is the ratio of（）.

A.weight of cable to weight of vessel

B.weight of cable to weight of anchor

C.length of anchor to depth of water

D.length of cable to depth of water

制造业的典型资源包括（）。

A.材料费

B.动力费

C.职工薪酬

D.折旧费