电压互感器二次绕组应装设熔断器,该熔断器起()作用。 A.短路保护 B.过载保护 C

题型:单项选择题

问题:

电压互感器二次绕组应装设熔断器,该熔断器起()作用。

A.短路保护

B.过载保护

C.短路和过载保护

考点:电力系统电力系统题库
题型:单项选择题

在残差分析中,残差图的纵坐标为______.

题型:单项选择题

B

At the middle school level, there are many academic clubs in which students can participate. Students can choose clubs that focus on an area of interest.

Mathcounts Club

Mathcounts tries to increase excitement towards mathematic achievement. It hopes to provide students with the foundation for success in science, technology, engineering and mathematics careers. Schools select individuals and teams to participate in competitions. Local competitions are held in February with winners progressing to state competitions and then on to the national level. Mathcounts works to challenge student math skills, develop self-confidence and give rewards for their achievements.

Envirothon

The Envirothon program focuses on natural resources knowledge and exposes students to diverse environmental issues, ecosystems, and topography. The ecology field competition for five-member middle school teams offers competitions in wildlife, soils, forestry, current environmental issues and aquatics. Students work and learn in middle school clubs and can compete at the local and state level.

Future Problem Solvers

Future Problem Solvers is an academic club that uses a six-step process to solve problems that may happen in the future. Students who are in the talented and gifted program, who like to “think out of the box,” or who enjoy thinking about futuristic problems may like this club. Teams comprised of four students read future scenes and write up solutions in a booklet using the six-step process. Teams that score high enough can go to the state competition and then to the international competition.

Builders Club

Builders Club is open to any middle school student who wishes to perform community service. Each Builders Club is co-sponsored by a Kiwanis club and the middle school. The members learn by doing, and they learn organization, teamwork, and leadership. Builders Clubs can sponsor a "Teacher of the Year" program, provide a recycling collection point, organize canned food and clothing drives to support local shelters, adopt a resident at a local senior citizens home, adopt a highway, tutor, etc.

Middle school academic clubs offer students a place to explore interests or talents. The clubs they join in middle school can help guide choices in high school and beyond.

59.The students who are not interested in competitions woudld like to choose        .

A.Mathecounts Club    B.Builders Club

C.Future Problem Solvers   D.Envirothon

60.Why do some of the students choose Mathcounts Club?

A.To be successful in science careers.

B.To enjoy solving future problems.

C.To perform community service.

D.To study wildlife and soils.

61.What is the common feature of the four clubs?

A.Competitions.            B.Sponsorship.   

C.Scientific researches.       D.Teamwork.

62.The passage mainly talks about         .

A.the state academic competitions     B.middle school clubs

C.extra – curricular activities        D.the gifted students

题型:单项选择题

加压塔底残液中甲醇浓度设计指标为()。

A、<150PPm

B、60.17%

C、50%

D、<100PPm

题型:单项选择题

调度交接班的主要内容是什么?

题型:单项选择题

水泥稳定碎石强度试验时,试件在北方地区养生期间温度应保持为()。

A.20℃

B.25℃

C.20℃±2℃

D.25℃±2℃

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