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

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.

Microwave communication uses (1) -frequency radio waves that travel in straightline sthrough the air. Because the waves cannot (2) with the curvature of the earth, they can be (3) only over short distance. Thus, microwave is a good (4) for sending data between buildings in a city or on a large college campus. For longer distances, the waves must be relayed by means of" dishes" or (5) . These can be installed on towers, highbuildings, and mountain tops.

2（）

A．reflex

B．distort

C．bend

D．absorb