偏心受拉构件的抗弯承载力( )。

A．(A) 随轴向力的增加而增加

B．(B) 随轴向力的增加而减小

C．(C) 小偏心受拉时随轴向力的增加而增加

D．(D) 大偏心受拉时随轴向力的增加而增加

In comparison to electric power，hydraulic power for jacking systems has the advantage of（）.

A.better control capabilities

B.less maintenance and repair

C.fewer personnel needed during jacking

D.less preload needed