防爆电气设备外壳的隔爆程度是由外壳装配结合面的宽度、间隙和()来保证的。

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问题:

防爆电气设备外壳的隔爆程度是由外壳装配结合面的宽度、间隙和()来保证的。

考点:综采维修电工综采维修电工(中级)综采维修电工(中级)题库
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分解因式:3a+3b=___________

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短周期元素形成的常见非金属固体单质A与常见金属单质B,在加热条件下反应生成化合物C,C与水反应生成白色沉淀D和气体E,D既能溶于强酸,也能溶于强碱。E在足量空气中燃烧产生刺激性气体G,G在大气中能导致酸雨的形成。E被足量氢氧化钠溶液吸收得到无色溶液F。溶液F在空气中长期放置发生反应,生成物之一为H。H与过氧化钠的结构和化学性质相似,其溶液显黄色。

请回答下列问题:

G与氯酸钠在酸性条件下反应可生成消毒杀菌剂二氧化氯。该反应的氧化产物为(),当生成2mol二氧化氯时,转移电子()mol。

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阅读理解。

     HANGZHOU, China - Millions of Chinese basketball fans who were upset about the retirement of

Yao Ming, are excited to see another even more shining star, Jeremy Lin, rising from the N.B.A and

becoming a household name all across China.

     "We are amazed by Lin Shuhao's magic performance and should cheer him on," one Internet user

wrote.

"His sport shirts have sold out, even including the counterfeit(仿制品) ones," said Zheng Xiaojun, a

24-year-old clerk.

     Lin's amazing success over the last month has caught the imagination of the Chinese. He has been

particularly popular here in northern Zhejiang province, from which his grandmother went to Taiwan in

the late 1940s.

     Cai Qi, a well-known micro blogger, posted a message on micro blog over the weekend stating that

Lin's hometown is Jiaxing, a city near Hangzhou where Lin's grandmother grew up.

     Cai Qi's nephew Yu Guohua, a 56-year-old factory worker, is Lin's closest relative still living in

northern Zhejiang. He said in a telephone interview that Lin had come to play basketball with the Jiaxing

High School team last May and had been surrounded by admirers.

     Yu said he did not have a chance to meet Lin in the crowd, but managed to speak with his family.

"His father was very supportive of Lin's playing basketball, but his grandmother was not, for fear he

would be injured," Yu said.

     Lin may owe his height, 6 feet 3 inches, to his grandmother's family, Yu said. Chen Weiji, the father

of Lin's grandmother, was well over 6 feet and all of Chen's children were tall as well, he said.

     The N.B.A. believes that 300 million people in China play basketball. The retirement last year of

Yao Ming took its main Asian draw away from the N.B.A. But Lin's appearance has helped the league

remain a hot topic of Chinese online chatter.

1. Why does Lin Shuhao appeal especially to people in northern Zhejiang ?

A. He was born in Zhejiang.

B. His sports shirts are made in Zhejiang.

C. He once visited Zhejiang.

D. His grandmother grew up in Zhejiang.

2. We can learn from the text that ________.

A. Lin once played on Jiaxing High School team

B. All Lin's relatives moved to Taiwan 60 years ago

C. Lin's grandmother didn't expect him to be a player

D. Lin's father loved playing basketball

3. Lin's success in N.B.A has ______.

A. attracted more Chinese children to play basketball as a career

B. drawn Chinese people's attention back to the league

C. helped his hometown develop sports shirts business

D. helped his hometown attract more foreign visitors

4. Which is the best title of the report?

A. The Secret of Lin's Success

B. Lin, A New Focus in China

C. Lin and His Family

D. Chinese Players in N.B.A

题型:填空题

引起变换炉床层超温的因素有()。

A.蒸汽加入量过大

B.导气速度过快

C.汽/气比过低

D.汽/气比过高

题型:填空题

在人多地少、市场经济比较发育的地区农村移民一般采用的安置方式是()。

A.以土地安置为主

B.以土地与非土地安置相结合

C.以非土地安置为主

D.一次性补偿为主

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