既补肾助阳,又祛风除湿的药物是()
A.巴戟天
B.肉苁蓉
C.郁李仁
D.桑寄生
E.当归
参考答案:A
Rather than _____on a crowed bus, I prefer ____to work every day.
A.to ride ,to walk
B.riding ,walking
C.ride ,to walk
D.to ride, walking
什么叫浮选法?