最常用的数码管显示器是七段式显示器件。
参考答案：对
女，5岁，无头痛、头晕及浮肿，查体：血压120/95mmHg，尿常规未见异常。最可能的诊断
A．肾性高血压B．继发性高血压C．原发性高血压D．家族性高血压E．多发性大动脉炎
__________ many times, he finally understood it.
A．Being told
B．Telling
C．Having been told
D．Having told
