外皮红色,有细皱纹和灰白色小点的药材为()
A.五味子
B.山楂
C.栀子
D.豆蔻
E.砂仁
参考答案:B
- Thank God you’re safe!
- I stepped back, just ______ to avoid the racing car.[ ]
A. in time
B. in case
C. in need
D. in vain
X线管的靶面材料通常是
A.铁 B.钨 C.金D.铜 E.钼