若水流的流线之间夹角很大或者流线曲率半径很小，这种水流称为（）。
A.均匀流
B.渐变流
C.恒定流
D.急变流
参考答案：D
He had once been with drug dealings, but evidence found later
proved his innocence.
A．accused
B．sentenced
C．charged
D．tried
患者，烦渴多饮半月余，口干舌燥，尿频量多，舌边尖红，苔黄，脉洪数有力。治法宜用
A．清热润肺，生津止渴B．养阴润肺，生津止渴C．清胃泻火，养阴保津D．滋阴固肾E．清泻肺胃
