低钾血症的患者，补钾后病情仍无改善时，应首先考虑缺乏（）
A.镁
B.磷
C.钠
D.氯
E.铜
参考答案：A
—The population of India is _______ than _______ China.
—Right. Developing countries should control the population. [ ]
A. bigger; in
B. fewer; of
C. fewer; that of
D. smaller; that of
宫颈癌根治术后可以拔除尿管的时间是术后
A．1～2天B．7～14天C．3～4天D．5～6天E．2周以后
