It is good practice to use long towlines for ocean tows because the（）.

A.wear on the towline is equalized

B.weight of the towline increases the towing force

C.dip in the towline absorbs shock loads

D.danger of overriding is reduced

( )是保证工程项目建设正常进行的必要资金，是建设项目投资中最主要的部分。

A．建设项目总投资
B．建设工程造价
C．建筑安装工程造价
D．建设装饰装修工程造价