A harmonious society is like a symphony orchestra-each person contributes a small sound, but

when ________ with other sounds, it becomes beautiful music.[      ]

A. combining  

B. being combined

C. combined  

D. to be combined

女性，24岁。血压29.3/16kPa(220/120mmHg)，下列哪项表现对于诊断该患者为肾血管性高血压最有特征性（）。

A．有高血压家族史

B．眼底可见动脉交叉受压

C．上腹部可闻连续高调杂音

D．血浆肾素水平升高

E．尿蛋白(＋＋)，红细胞5／HP