电气化铁路接触网触电伤害事故的主要隐患不包括______。 A．接触网网下作业带电违

修建一所希望小学，实际造价20万元，比原计划节省2万元，节省了百分之几？

Speaker A: I'd like to talk to Professor Smith, can you arrange it for meSpeaker B: ______

A．Yes, of course. Would tomorrow morning be convenient for you

B．Why don't contact him yourself directly

C．I am afraid he can't see you unless you have an appointment with him.

D．I don't think I have the right to arrange it for you.

POX染色呈阴性反应的细胞是（）

A.M3的早幼粒细胞

B.中性分叶粒细胞

C.嗜酸性粒细胞

D.单核细胞

E.淋巴细胞

干式电压互感器巡视时，一、二次引线连接正常，各连接接头无（）迹象，本体温度无异常。

A.发热

B.过热

C.烧坏

D.接触不良

原发性高血压的最重要的致病原因是

A．摄盐量过多

B．吸烟

C．交感神经兴奋性增强

D．肾上腺嗜铬细胞瘤

E．遗传素质