既能补火助阳，又能引火归原的药物是（）
A.丁香
B.附子
C.肉桂
D.吴茱萸
E.高良姜
参考答案：C
The young pioneers kept on working in the fields ________ they felt tired and thirsty.[ ]
A. but
B. or
C. even though
D. since
多与其他治法配合使用以治疗各种鼻窍不通的鼻病的治法是
A．疏风解表B．清热解毒C．行气活血D．芳香通窍E．清热利湿
