风动排料系统的风压超过()MPa时,安全阀应当能自动放风。

题型:填空题

问题:

风动排料系统的风压超过()MPa时,安全阀应当能自动放风。

考点:选煤工程师选煤综合练习选煤综合练习题库
题型:填空题

下列各句中,没有语病的一句是[ ]

A.青藏铁路纵贯青海、西藏两省区,跨越青藏高原,是连接西藏与内地的一条具有重要战略意义的铁路干线。

B.这家老字号食品厂规模不大,但从选料到加工制作都非常讲究,生产的食品一直都是新老顾客备受信赖的。

C. * * 广场等七个红色旅游景点是否收门票的问题,国家旅游局新闻发言人已在记者招待会上予以否认。

D.中央财政将逐年扩大向义务教育阶段家庭经济困难的学生免费提供教科书,地方财政也将设立助学专项资金。

题型:填空题

呼吸音以外的附加音均见于病理状况,但不包括()

A.哮鸣音

B.捻发音

C.干啰音

D.大水泡音

E.中湿啰音

题型:填空题

请根据下图作答:

已知:一个碳原子上连有两个羟基时,易发生下列转化:

(1)反应①所属的有机反应类型是______反应.

(2)反应③的化学方程式______.

(3)已知B的相对分子质量为162,其完全燃烧的产物中n(CO2):n (H2O)=2:1,则B的分子式为______.

(4)F是高分子光阻剂生产中的主要原料.F具有如下特点:①能跟FeCl3溶液发生显色反应;②能发生加聚反应;③苯环上的一氯代物只有两种.F在一定条件下发生加聚反应的化学方程式为______.

(5)化合物G是F的同分异构体,属于芳香族化合物,能发生银镜反应.G的结构有______种.

(6)化合物H是B的同分异构体,H分子中含有的部分结构为

,它的水解产物经聚合反应后可得到高聚物(CaHbO2nH有多种结构,写出其中一种的结构简式______.

题型:填空题

阅读理解。

    In 1937, Disney's cartoon, Snow White and Seven Dwarfs, was produced. It was the first full-length

movie cartoon ever made. The film remains popular today. Snow White was followed by a number of other

cartoon films, including Pinocchio, Fantasia and Bambi. 

    In 1950, Disney's company began to make non-cartoon films of the best novels in the world for young

people. The company became not only one of the main producers of films but also a publisher (出版商) of

books for children. 

    In 1955, Disney opened a large amusement park called Disneyland in Los Angeles. Very quickly the park

became an attractive place for both men and women, young and old. 

    Disney died in 1966. He didn't live to see the opening of another Disney amusement park. The new park,

opened in Florida in 1971, is called Walt Disney World. It is even larger than Disneyland and has become one

of the world's most popular holiday places.

    In both of the parks, visitors can ride, walk, or boat as they like. There is fairyland (仙境), where you can

meet the characters from fairy tales and Disney's cartoons and films. If you want something more exciting,

you may experience your own adventures (冒险).

    Since its opening, Disney World has been made larger and larger. It is made up of several wonderful and

magic parts. Besides, Disney amusement parks have been built in other parts of the world. Tokyo Disneyland,

for example, was opened to public in 1983.

1. Disneyland was successful, because ______. [ ]

A. it became an attractive place for both men and women, young and old

B. Snow White and Seven Dwarfs was popular

C. people could not only see films but also read books there

D. there were few amusement centers at that time

2. Which of the following words can be used to describe Disney? [ ]

A. Nervous.

B. Common.

C. Successful.

D. Unknown.

3. Which of the following is true? [ ]

A. Disney died before the 1960s.

B. Disney died before Walt Disney World was set up in Florida.

C. Snow White and Seven Dwarfs were not produced by Disney.

D. Walt Disney world is smaller than it used to be.

4. "Both of the parks" in Paragraph 5 refers to parks ______. [ ]

A. in New York and in Los Angeles

B. in Los Angeles and in Florida

C. in Florida and in Tokyo

D. in Tokyo and in Los Angeles

题型:填空题

随钻上击器采用液压工作原理上击,上击力大小由()来决定。

A、调节环

B、上提拉力

C、上提速度

D、钻挺产生的重力

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