下述哪一条是顺序存储结构的优点( )

A．存储密度大

B．插入运算方便

C．删除运算方便

D．可方便地用于各种逻辑结构的存储表示

A device used to tighten up remaining slack in wire rope when you are making up to a tow in inland waters is a（）.

A.tripping line

B.tripping bracket

C.norman pin

D.steamboat ratchet