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三相异步电动机自耦降压启动控制 实训目的 ①能绘制其原理图。 ②能掌握其工作原理。 ③能完成其原理图的标注。 ④能根据标注的原理图绘制出安装接线图。 ⑤能根据安装接线图独立进行接线。 ⑥能根据原理图分析设备出现的故障。 ⑦能根据安装接线图确定故障的位置，并进行维修。 实训设备和器件 动力电源，带漏电保护低压断路器一个，接触器三个，动断按钮一个，动合按钮一个，热继电器一个，通电延时的时间继电器一个(机械式的、电子式的或接触器外挂延时模块都可以)，自耦变压器一台，电动机一台，黄、绿、红指示灯各一个，导线若干。
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【单选题】The word ( ) means 'exclusive control of a particular market that is marked by the power to control prices and exclude competition and that esp. is developed willfully rather than as the result of sup...
A.
duress
B.
monopoly
C.
void
D.
patent
【简答题】If the actual quantity less than the quantity marked in the B/L，（ ）should take the responsibility．
【单选题】________ successful launch of TiangongⅠ on September 29th marked ________ significant step in our country's plan to build a space station. [ ]
A.
The; a
B.
/; a
C.
A; the
D.
/; the
【简答题】As is known, 2009 marked the 60 th anniversary of the founding of the People’s Republic of China. And many leaders __小题1:__ other countries sent their best wishes to the people of China on this import...
【单选题】The word ( ) means "a law enacted by the legislative branch of a government".
A.
prosecute
B.
precedent
C.
statute
D.
code
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