一个排水当量对应于（）L/s的排水流量.
A.0.22
B.0.5
C.0.33
D.1.0
参考答案：C
At no time does the salesgirl get up late in the morning, for she is always too busy _____ a good rest.
A．to take
B．taking
C．took
D．taken
中极穴位于脐下（）
A.2寸
B.3寸
C.4寸
D.5寸
E.6寸
