单级离心泵平衡轴向推力的方法主要有哪些?()
A、平衡盘;
B、平衡管;
C、平衡孔、平衡管采用双吸式叶轮;
D、都对。
参考答案:C
I’m not sure how much scholarship you will receive, but it will roughly ___ your major expenses.
A.swap
B.abolish
C.settle
D.cover