活塞式压缩机的理想工作过程,由()三个过程组成。
A.膨胀、吸气、压缩
B.膨胀、压缩、排气
C.吸气、压缩、排气
D.吸气、膨胀、排气
参考答案:C
With increasing working pressure, Anthony has ________ time to spend with his friends than before.
A.much
B.more
C.less
D.least
测血压听到搏动声突然变弱或消失,此时袖带内压力()。
A.大于心脏收缩压
B.高于心脏收缩压
C.小于心脏收缩压
D.等于心脏舒张压
E.大于心脏舒张压