超声速气流流过膨胀波后，流速（）。
A.增大
B.减小
C.不变
参考答案：A
There are ________ people in the supermarket ________ we can’t buy things quickly.
A．too much; to
B．such many; that
C．too many; to
D．so many; that
肛门湿疹中医辨证为湿热下注型，方选（）
A.萆薢渗湿汤
B.龙肝泻肝汤
C.导赤散
D.滋水清肝饮
E.暖肝煎
