导致容量依赖型高血压的主要因素( )
A．肾血管痉挛B．肾血流量下降C．低蛋白血症D．水钠潴留E．醛固酮增多
参考答案：D
— Could I have an interview with Mr Green now, please?
— Sorry, he _________ a meeting. You’d better wait a minute.
A．has
B．had
C．is having
D．was having
什么是矿井“六位一体”综合防突措施？
