水泵在额定的流量和扬程条件下，水泵（）所需的功率叫轴功率。
A.配用功率
B.有效功率
C.轴功率
参考答案：C
Linda felt someone ________ on her way home from work yesterday evening, and therefore she was frightened and looked back from time to time.
A．followed
B．would follow
C．had followed
D．was following
--Do you have a _____?
-- Yes, I _____ at a clothes shop.
A．job, work
B．work, job
C．job, job
D．work , work
