关于屋外配电装置,正确的描述有()。 A.按照电气主接线的标准配置或用户的具体要求,

题型:多项选择题

问题:

关于屋外配电装置,正确的描述有()。

A.按照电气主接线的标准配置或用户的具体要求,将同一功能回路的开关电器、测量仪表、保护电器和辅助设备都组装在全封闭或半封闭的金属壳(柜)体内,形成标准模块,由制造厂按主接线成套供应,各模块在现场装配而成的配电装置

B.成套配电装置分为低压配电屏(或开关柜)、高压开关柜和SF6全封闭组合电器三类

C.气体全封闭组合电器英文全称:Gas Insulted Switchgear,由断路器、隔离开关、快速或慢速接地开关、电流互感器、电压互感器、避雷器、母线和出线套管等元件,按电气主接线的要求依次连接,组合成一个整体,并且全部封闭于接地的金属外壳中,壳体内充一定压力的SF6气体,作为绝缘和灭弧介质

考点:电厂全能值班员考试发电厂电气专业知识发电厂电气专业知识题库
题型:多项选择题
函数y=
1
2-4x
+(x+1)0
的自变量x的取值范围是(  )
A.x>
1
2
B.x<
1
2
C.x≠
1
2
D.x<
1
2
且x≠-1
题型:多项选择题

对于血流,( )。

A.红色代表朝向探头方向,蓝色代表背向探头方向

B.零位基线向上为朝向探头方向,从零位基线向下为背向探头方向

C.亮度代表彩色血流的速度,颜色越亮速度越快

D.以上都对

E.以上都不对

题型:多项选择题

In 2016, athletes from around the world will compete for gold medals in the Summer Olympics. Even though the games are three years away, Brazil’s residents already feel like winners.

The nation was named to host this important sporting event in October,2009. It will be the first Olympics held in South America.

The games will take place in Rio de Janeiro. The city beat out three other sites, Madrid, Tokyo and Chicago, to host the event. When the International Olympic Committee chose Rio de Janeiro, cheering people flooded the city’s streets. “This is huge for Rio and for the whole country,” says resident Sueli Ferreira.

The Olympics are expected to attract tens of thousands of people. Brazilian officials have already started to prepare for the crowds. “ We know what we need to do,” explains Brazil’s president, Luiz Inacio Lula da Silva. “ The words from now on are work, work and work.”

Officials want to fix up local sports centers before Rio de Janeiro steps into the spotlight. They also want to reduce the amount of crime.

They hope hosting the games will improve life in Brazil. About 30 percent of people there live in poverty, or poor conditions. Tourism during the Olympics is expected to create more than 2 million jobs.

“ It’s going to be good for the economy, good for the people,” Ferreira says. “ This gives us hope that things will be better here.”

小题1:According to the passage, the 2016 Olympics will be held in ______.

A.Europe

B.Asia

C.North America

D.South America小题2:The feeling of Brazilians can be described as _________.

A.proud

B.surprised

C.worried

D.nervous小题3:The underlined word “flooded” in Para.3 means_______

A.crossed

B.filled

C.visited

D.cleaned小题4:According to Brazil’s president, we can know________.

A.the government needs help from the Brazilian public

B.the government will begin to prepare for the Olympics soon

C.Brazilian officials will try hard to prepare for the Olympics

D.Brazilian official are now too busy to prepare for the Olympics小题5:We can learn from the last two paragraphs that___________.

A.Brazilians’ life will be better because of the Olympics

B.not all Brazilians are interested in the Olympics

C.most Brazilians are now living in poor conditions

D.Brazilians worry about losing jobs during the Olympics

题型:多项选择题

()是电子商务所具优势正常发挥的保证。

A.信息流

B.资金流

C.物流

D.商流

题型:多项选择题

血小板仪颗粒贮存的物质中,()可以中和肝素的抗凝活性;()表达在静息血小板的α颗粒膜,活化时表达在血小板膜表面。

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