问题 问答题 简答题

简述折带式过滤机工作原理。

答案

参考答案:

折带式过滤机的工作原理:过滤室随筒体旋转进入矿浆槽中,过滤室经过滤液管、喉管与分配头的过滤区相通,室内被真空泵吸成负压,水透过滤布进入过滤室内,被真空泵抽出机外,固体颗粒附着在滤布上形成滤饼,随着筒体的转动滤布离开矿浆面,滤饼中的水分不断被吸出。当滤饼随滤布脱离筒体,由托辊送到卸料处,滤布由直线运动变为曲线运动,由率半径突然减小,致使滤饼龟裂而脱落,实现了矿浆的过滤脱水。

阅读理解

Recently a Beijing father sent in a question at an Internet forum (论坛) asking what "PK" meant.

"My family has been watching the 'Super Girl' singing competition TV programme. My little daughter asked me what 'PK' meant, but I had no idea," explained the puzzled father.

To a lot of Chinese young people who have been playing games online, it is impossible not to know this term. In such Internet games, "PK" is short for "Player Kill", in which two players fight until one ends the life of the other.

In the case of the "Super Girl" singing competition, "PK" was used to refer to the stage where two singers have to compete with each other for only one chance to go up in competition ranking.

Like this father, Chinese teachers at high schools have also been finding their students' compositions using Internet jargons which are difficult to understand. A high school teacher from Tianjin asked her students to write compositions with simple language, but they came up with a lot of Internet jargons that she didn't understand.

"My 'GG' came back this summer from college. He told me I've grown up to be a 'PLMM'. I loved to 'FB' with him together; he always took me to the 'KPM'," went one composition.

"GG" means Ge Ge (Chinese pinyin for brother). "PLMM" refers to Piao Liang Mei Mei (beautiful girl). "FB" means Fu Bai (corruption). "KPM" is short for KFC, Pizza Hut and McDonald's.

Some specialists welcome Internet jargons as a new development in language.

If you do not even know what a Kong Long (dinosaur, referring to an ugly looking female) or a Qing Wa (frog, referring to an ugly looking male) is, you will possibly be regarded as a Cai Niao!

小题1:By writing the article, the writer tries to  ________ .

A.explain some Internet language

B.suggest common Internet language

C.laugh at the Beijing father

D.draw our attention to Internet language小题2:What does the writer think about the term "PK"?

A.Fathers can't possibly know it.

B.The daughter should understand it.

C.Online game players may know it.

D."Super Girl" shouldn't have used it.小题3:The examples of the Beijing father and the Tianjin teacher are used to show that Internet jargons ________ .

A.are used not only online

B.can be understood very well

C.are welcomed by all the people

D.cause trouble to our mother tongue小题4:The underlined word "jargons" means " ________ " in Chinese.

A.行话

B.粗口

C.歌词

D.趋势

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