气虚秘若气虚下陷，肛门坠胀者，可用补中益气汤合用何方
A．麻子仁丸B．更衣丸C．六磨汤D．黄芪汤
参考答案：D
Byron Campbell purchased 300 shares of Crescent, Inc. , stock at a price of $80 per share. The purchase was made on margin with an initial margin requirement of 50 percent. Assuming the maintenance margin is 25 percent, the stock price of Crescent, Inc. has to fall below what level for Campbell to receive a margin call（）
A. $40.00.
B. $30.00.
C. $53.33.
男，83岁，平日血压．160～170／100～109mmHg患心肌梗死，诊断为（）
A.高血压病1级，极高危
B.高血压病1级，高危
C.高血压病3级，极高危
D.高血压病2级，高危
E.高血压病2级，极高危
