药材升麻的原植物有（）
A.升麻
B.红升麻
C.兴安升麻
D.单穗升麻
E.大三叶升麻
参考答案：A, C, E
you prefer,I'll give it to you.But we don't have any other models for you to choose from. [ ]
A.Whatever
B.Whenever
C.Whichever
D.However
兆欧表的电源是由（）提供。
A、电池
B、交流发电机
C、直流发电机
D、以上均不是
