电气设备分为高压和低压两种，高压电气设备为电压等级在_________；低压电气设备为电压等级在_________。

所谓运用中的电气设备，系指全部带有电压、_________或______________的电气设备。

一台2kV·A,400/100V的单相变压器，低压侧加100V，高压侧开路测得I0=2A；P0=20W；当高压侧加400V，低压侧开路，测得I0=_______A，P0=_______W。

We can’t judge a person by his or her _______

－ What does the sign over there read － “No person ________ smoke or carry a lighted cigarette, cigar or pipe in this area”

______________ is a measure of incomeor profit divided by the investment required to obtain that income or profit

直流电压在________以下极少引起伤亡事故，而交流电在________以上即会造成触电危险。

凡是工作在额定电压交流1200v或直流_____及以下的电路中，起保护、控制、调节、转换和通断作用的电气设备统称为低压电器。

The desirable properties or a marine fuel oil should include_______.

Which do you think is _________________important, health or wealth?

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

It will be a relief over the death of a friend or a relative if the friend or relative dies from ______.