试写出3种最常见的致继发性高血压的内分泌疾病。

She was surprised to find the fridge empty; the children ________ everything![ ]

A. had been eating  

B. had eaten

C. have eaten  

D. have been eating

我国公民在法律面前人人平等指的是( )。

A．权利的平等性

B．权利的广泛性

C．权利的真实性

D．权利的平衡性

YB55型小盒透明纸包装机是一台（）程度较高的包装设备。

市场细分

表皮生长因子受体