当泵运行时，机械密封的泄漏量不应大于（）。
A、1mL/h
B、2mL/h
C、3mL/h
D、5mL/h
参考答案：D
Such small shoes don't ___ me. Besides, they won't ___ for climbing mountains.[ ]
A. go with, help
B. suit, work
C. match, fit
D. fit, do
If you are in a country ______they don’t speak your language，you can show the address to the taxi driver.
A．which
B．where
C．what
D．when
