下列选项中,能解表消疮的药物是( )
A.防风B.细辛C.荆芥D.羌活
参考答案:C
—How much orange juice is there in the fridge? — ________. [ ]
A. No
B. No one.
C. None
D. Nothing.
用机械式万用表测量电阻时,应该如何操作?