在采用需用系数法计算负荷时,求得自然功率因数为0.7,总的有功计算负荷为750kW,

题型:单项选择题

问题:

在采用需用系数法计算负荷时,求得自然功率因数为0.7,总的有功计算负荷为750kW,要求安装无功功率补偿电容器将功率因数补偿到0.9,无功补偿量约为( )kvar。

A.300

B.400

C.500

D.600

考点:注册电气工程师供配电专业注册电气工程师(供配电专业)
题型:单项选择题

阅读理解。

     In a 2005 survey of 2005 schoolchildren in six cities, including Beijing and Shanghai, it was found that

about 77% of them were short of sleep. Should school hours be cut? In new survey taken by the China Daily

website, almost 70% of the 1, 133 people online agreed with cutting school hours, while 20% disagreed and

10% gave no answer.

     Liu Xing (12-year-old, 6-grade student): I get up at 5:50 every school day, have breakfast at 6:15, leave

home at 6:30 and, after a 30-minute bus ride, arrive at school at 7:00, a full hour before lessons start. Besides,

I spend my weekends taking classes in math and English, as well as learning to play the piano.

     Wang Qun (Liu Xing's mother): My son is still no t doing enough to win a place at a top high school, as it

is so competitive. They want students with good English and math and also special skills.

     "Craig" (netizen): The best way for children to learn is through play. Through play, they can develop their

characters, learn to be independent and improve all kinds of skills.

     "Skylark" (netizen): Young parents have little time to play with their children, so letting them go home early

is not a good idea. I think schools should have more activities for children after class.

     Qi Zhen (high school teacher): People might take some time to accept shorter school hours. It will also

take time to change people's traditional mind that going to college is the only way to a good job.

1. The China Daily website took a new survey to _______.

A. see how many school children are short of sleep

B. see what people think of cutting school hours

C. give schoolchildren more time to play

D. Liu Xing with his math and English study

2. _______ probably disagree with shorter school hours.

A. Wang Qun and "Skylark"

B. Liu Xing and "Craig"

C. Liu Xing and "Skylark"

D. "Craig" and Qi Zhen

3. Which is not true about Wang Qun?

A. She wants her son to have many kinds of skills.

B. She has little time to play with her son every day.

C. She believes a happy childhood means a failed adulthood (成年).

4. What can we learn from QI Zhen's words?

A. Schools should have more activities for children after class.

B. All the schools will take shorter school hours soon.

C. There'll be a long to way to change people's traditional mind.

D. Through play children can develop well in different ways.

题型:单项选择题

契税的税率为()的幅度税率,由各省、自治区、直辖市政府在这个税率幅度范围内自行决定。

A.3%~5%

B.3%~4%

C.4%~5%

D.5%~6%

题型:单项选择题

2010年10月11日,郭明义同志先进事迹报告会在北京人民大会堂举行。胡 * * * * 指出,郭明义同志是助人为乐的道德模范,是新时期学习实践雷锋精神的优秀代表。向郭明义学习,我们青少年应该[     ]

①增强社会责任感,做一个负责任的人

②树立正确的世界观、人生观和价值观

③关爱他人、服务社会

④积极参加社会公益活动

A.①②③

B.②③④

C.①③④

D.①②③④

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链条装配后,过松容易产生振动或()。

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创新与()密切相关。

A、经济繁荣

B、人类文明

C、产品供给

D、技术进步

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