采煤机滚筒升起后又自降的原因有()。A、液压锁损坏 B、换向阀损坏 C、调高油缸窜液 D、

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问题:

采煤机滚筒升起后又自降的原因有()。

A、液压锁损坏

B、换向阀损坏

C、调高油缸窜液

D、管路漏损

E、调高泵损坏

F、安全阀损坏

考点:煤炭矿山职业技能鉴定考试煤矿机械安装工(综合练习)煤矿机械安装工(综合练习)题库
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Reading is very important. World Book Day falls on April 23 every year. It encourages people, especially teenagers, to discover the pleasure of reading. It is also the day to honor (尊敬) great writers.

Many countries celebrate (庆祝) World Book Day. On that day, millions of school children can buy books at a much lower price than usual in any bookstore in England. It has been done every year since 1998. World Book Day is also celebrated in China. Wen Jiabao, Premier of China, is an avid reader. He does lots of reading every day though he is very busy. On World Book Day 2009, he called on (号召) people to do more reading. Wen suggested that young people should spend more time reading. “Books can not change the world, but people can change the world by changing themselves through reading,” he said.

Reading helps us become more knowledgeable and smarter. Reading helps us to follow the latest developments of science and technology (技术). Reading gives us information about other cultures and places in the world. Reading is also one of the most important ways to learn a foreign language like English. We all know that it is difficult to learn everything in the classroom, for example, the ways English people are living and working today can be learnt by reading.

Books, magazines, newspapers and other kinds of reading materials can help us to know more about the outside world. Therefore, it is necessary for us to spend time reading every day.

小题1:When is World Book Day?   

A.August 8 every year.

B.March 12 every year.

C.April 23 every year.

D.June 6 every year.小题2:An avid reader is a person who __________.

A.loves reading

B.never reads

C.does some reading

D.hates reading小题3:World Book Day was set up in order to encourage people to __________.

A.learn foreign languages

B.do more reading

C.buy more books

D.know more about science小题4:According to the passage, reading can help people in many ways EXCEPT _____.

A.learning English better

B.knowing more about cultures

C.improving your health

D.knowing more about the outside world小题5:What’s the best title for the article?

A.World Book Day in England.

B.Suggestions on Reading.

C.World Book Day in China.

D.World Book Day and the Advantages of Reading.

题型:多项选择题

中度CO中毒的临床表现为()。

A.瞳孔对光反应和角膜反射迟钝

B.血COHB浓度30%~40%

C.口唇呈樱桃红色

D.出现潮式呼吸、血压下降

E.常有脑水肿伴惊厥、呼吸抑制

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可作为SLE特异性标志的自身抗体是 ()

A.抗Sm抗体和抗dsDNA

B.抗dsDNA抗体和ANA

C.抗ssDNA抗体和ANA

D.抗DNP抗体和ANA

E.抗SS-A抗体和抗核组蛋白抗体

题型:多项选择题

下列细菌中对干燥抵抗力量强的细菌是

A.脑膜炎奈瑟菌

B.淋病奈瑟菌

C.霍乱弧菌

D.肺炎链球菌

E.结核分枝杆菌

题型:多项选择题

在货运险中,造成货损的第三者责任人是()

A.发货人

B.收货人

C.承运人

D.理货人

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