【单选题】The look on his face suggested that he that. [ ]
A.
puzzling ; hasn't expected
B.
puzzled ; hadn't expected
C.
puzzling ; doesn't expect
D.
puzzled ; didn't expect
【单选题】The _______ look on his face suggested he ______ that. [ ]
A.
astonished; hadn't expected
B.
astonishing; hadn't expected
C.
astonishing, hasn't expected
D.
astonished; wouldn't have expected
【判断题】If buyers expected the future price of a good to increase, it would tend to increase the current quantity exchanged.
【单选题】在不考虑液压泵的泄漏流量的情况下 , 在单位时间内所排出的液体体积 是( )
【简答题】A.He tries on some other things that the others think best. B.He usually doesn't buy anything. C.He spends hours having a look round. D.He buys it so long as its color is right.
【简答题】液压泵的排量V是指在不考虑泄漏的情况下,泵轴每转( )所排出油液的体积。排量大小取决于液压泵的( )的大小(与转速无关)。排量的符号为V,单位为mL/r