气随血脱的生理基础是
A．气能生血B．气能摄血C．气能行血D．血能载气E．血能生气
参考答案：D
— Silly me! I forget what my luggage looks like.
— What do you think of _______ over there?[ ]
A. the one
B. this
C. it
D. that
转子泵的结构特点与往复泵（）。
A、相同
B、不相同
C、接近
