上呼吸道的三条轴线是()
A.口轴线
B.咽轴线
C.喉轴线
D.鼻轴线
E.气管轴线
参考答案:A, B, C
If you take the medicine twice a day, it could your cold. [ ]
A. treat
B. cure
C. help
D. heat
矿物药材信石中以红、黄、白、褐等色相间夹杂而成的花纹称为()
A.马牙贝
B.元宝贝
C.云头
D.云纹
E.五花层