正常人尿比密为（）。
A.1.010
B.1.015
C.1.020
D.1.015～1.025
E.1.025～1.035
参考答案：D
—The trip must have been terrible，wasn’t it?
—No.________，I enjoyed every minute.
A．On the other hand
B．At one time
C．At the same time
D．On the contrary
动电电位
