补骨脂具有的功效是（）
A.补肝肾，暖腰膝
B.壮肾阳，温脾阳
C.补肾阳，祛风湿
D.补肝肾，强筋骨
E.补肝肾，行血脉
参考答案：B
---I often chat with my friends on the Internet.
---You are so smart! Will you please tell me ________?
A．how to do
B．how to do it
C．how to use
D．when can I use it
RIP的最大度量权值是（）.
A．7
B．10
C．15
D．16
