断面散有黄棕色油室，置空气中可析出白色细针状结晶的药材是（）
A、白术
B、苍术
C、香附
D、半夏
E、天冬
参考答案：B
—I think it’s very dangerous to drive six hours without a rest.
—I agree. Six hours really a very long time.
A．has
B．is
C．were
D．am
ITU-T建议（）定义了SDH复用映射结构。
A.G.722
B.G.709
C.G.707
D.G.728
