更年期出血。（）
A.己烯雌酚
B.黄体酮
C.丙酸睾丸酮
D.氯底酚
E.口服避孕药
参考答案：C
—This wall of air is an effective answer to the problem and it ____ work.
—But it is a question to put such a wall of air around the statue.
A．may
B．must
C．should
D．could
重症休克常出现
A．中心性发绀B．周围性发绀C．混合性发绀D．高铁血红蛋白血症E．硫化血红蛋白血症
