高血压伴有低钾首先应考虑（）
A.皮质醇增多症
B.原发性醛固酮增多症
C.嗜铬细胞瘤
D.继发于慢性肾炎的高血压
E.肾动脉狭窄
参考答案：B
-----Did your father come back early last night?
-----Yes ,It was not yet eight o’clock _____he arrived home.
A．before
B．when
C．that
D．until
稳定连铸钢水温度的措施有哪些？
