借助药物在水中沉降的性质分取药材极细粉末的方法称为（）。
A.沉降
B.水飞
C.水分
D.水沉
参考答案：B
Why does Tina want a reporter? Because she likes people and stories. [ ]
A. to be, talking to, writes
B. to be, talking to, writing
C. be, talking, writing
D. be, talking, writes
PNH患者，实验室检查结果阳性的是( )
A．热溶血试验B．蔗糖溶血试验C．酸溶血试验D．尿含铁血黄素试验E．以上都是
