∵a是2的算术平方根，
∴a=
∴
解得x＜3，
∵x是正整数，
∴x=1或2．
—Alice, you look puzzled．Haven’t you understood it?
—Yes．I _of another problem just now．
A．had thought
B．have thought
C．thought
D．was thinking
枳实导滞丸治疗泄泻、下痢，属于（）
A.增水行舟
B.通因通用
C.逆流挽舟
D.以泻代清
E.提壶揭盖
