射流泵的工作流体的压力越大,射流泵的抗汽蚀能力()
A.越差;
B.越好;
C.不一定;
D.没关系
参考答案:A
各种试剂按纯度从高到低的代号顺序是()
A.G.R.>A.R.>C.P
B.G.R.>C.P.>A.R
C.A.R.>C.P.>G.R
D.C.P.>A.R.>G.R
E.A.R.>G.R.>C.P
I think they are() Which of the following is not correct?
A.Briton
B.British
C.English
D.Englishmen