根据开关柜各元件的独立性，状态评价时将其分为（）个元件。

A.5

B.6

C.7

D.8

Which is the winter load waterline on the load waterline mark?（）.

A.The line over the summer load waterline

B.The line above the tropical load waterline

C.The line below the tropical load waterline

D.The line between the summer and the winter north Atlantic load waterline