椿皮的功效是（）
A.涩肠杀虫
B.敛肺生津
C.固精止带
D.益肾固精
E.敛汗止血
参考答案：A
以下各种尾气吸收装置中，适合于吸收易溶性气体，而且能防止倒吸的是（ ）
A．
B．
C．
D．
His eyes suddenly widened. I knew a good idea must have _____ to him.
A．happened
B．appeared
C．occurred
D．hit
