问题 问答题 论述题

什么是电气二次设备和二次回路?

答案

参考答案:

二次设备是指对一次设备的工作进行监测、控制、调节、保护以及为运行、维护人员提供运行工况或生产指挥信号所需的低压电气设备。

如熔断器、控制开关、继电器、控制电缆等。由二次设备相互连接,构成对一次设备进行监测、控制、调节和保护的电气回路称为二次回路或二次接线系统。

阅读理解

阅读理解。

     Want to know more about how World Food Programme helps women all over the world? Here is a

quick look at the valuable things it has done.

     Investing(投资) In Bulls, Woman Begins To Escape From Poverty

In Shahinoor's household there were days when she struggled to put even one meal on the family table.

She and her husband are among Bangladesh's poorest: those with no land, no wealth and little hope of

breaking out of hunger and poverty. But a new programme to unlock the entrepreneurial(创业的) spirit

of Bangladeshi women has transformed her life.

     Food Aid Brings Fresh Water To Nepalese Village

     Kanukura, 33, says that carrying water up the mountain slopes to her village used to be the hardest

part of her day. It's a job that mainly fell to women in this part of Nepal, who faced a difficult and tiring

climb when they needed water. But that's changed now, thanks to a new village tap, from which women

like Kanukura can get clean drinking water whenever they need it.

     In Colombia, Food Assistance Is Part Of Response To Violence Against Women

     In Colombia, WFP assists many victims of sexual and gender-based violence, providing them with

food assistance as they recover. As part of her work for WFP, Mariangela Bizzarri recently visited a

town on Colombia's Pacific coast to meet some of these women and to assess the effect of the violence

they have experienced. She sent us this personal account of one day of meetings.

     Afghanistan Diary - Day Six

     On the final day of Silke's trip to central Afghanistan, she meets three women, each of whom

impresses her with their determination to improve their own lives, and those of their families and their

community. One of them is thrilled at simply having a job in a government office. As a child the idea of

working outside her home had seemed impossible.

1. Who lives in a place where water used to be difficult to get according to the passage?     

A. Silke      

B. Kanukura    

C. Shahinoor    

D. Mariangela

2. We learn from the passage that women in Colombia ________. 

A. may give birth to 5 children 

B. can't go to school all their life

C. have to work in a government office

D. are more likely to get harmed than men      

3. Women in Bangladesh now become not so poor as they used to be by ________.   

A. raising bulls with the help of WFP

B. working more hours in the fields

C. doing part-time jobs in the evening

D. receiving money from the government

4. Which of the following is TRUE according to the passage?   

A. There are many victims of sexual violence in Nepal.

B. Getting clean drinking water is easier in Bangladesh.

C. The social position of women in Afghanistan has greatly changed.

D. Children in Colombia sometimes have only one meal a day.

判断题