左归丸含：（）
A．熟地黄、山药、山茱萸
B．枸杞、龟版、杜仲
C．菟丝子、肉桂、牛膝
D．附子、干姜
E．阿胶、鹿角胶、牡蛎
参考答案：A
函数f(x)＝(x－3)ex的单调递增区间是________．
—Can I go down this street?
—No. You'd better(最好) go along Bridge Street. The street is too _______ now. [ ]
A. small
B. busy
C. dirty
D. old
