问题 问答题 简答题

如何进行调速系统静态试验?

答案

参考答案:

进行调速系统的静态试验时,由于机组是静止不动的,主油泵和调速器不能提供其油压和信号,故启动高压油泵提供油系统用油,并人为采取措施产生信号。通过试验,应测取以下数据:

(1)调速器信号与油动机行程、控制油压等的关系。

(2)油动机行程与各调汽门开度的关系。

(3)调速器环及油动机的工作行程。

(4)传动放大机构的迟缓率。

(5)传动放大机构的迟缓率。

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A high school in Hiroshima City has been the first to do something with DNA in the world. Its students have won praise not only for doing this research but also for presenting their findings to groups of expert scientists. The school is one of the Super Science High Schools allowed by the Ministry of Education, Culture, Sports, Science, and Technology, where students are given an opportunity to study science at an advanced level. Here, students use the same type of hitech experimental laboratories as those found at universities. In these labs, they conduct experiments and research in new fields of study not found in textbooks. As part of this science course, the students, with the help of Hiroshima University, used a machine called sequencer (音序器), and over the course of a year and a half they succeeded in decoding (解译) the DNA. They then presented their results to academic groups. Achieving a world first might sound very wonderful, but the process of decoding the DNA involved very hard work. The students were also responsible for maintaining the equipment, and they had to read difficult research papers and put in extra study beyond their regular schoolwork.

"Researchers need to work hard. The work was tiring, but the students worked toward their ambitious goal of achieving a world first. They have a great sense of achievement, and the number of students who hope to become biologists has increased," said Taruma Akinori, who is in charge of the science course.

In addition to the results being added to the scientific community, the students’ research paper will be translated into English and made available overseas. Moreover, the students have decided to take on a new challenge in DNA decoding.

小题1:Which of the following is the most suitable title for the passage?

A.Decoding the blueprint of life

B.Super Science High School

C.More students hoping to become biologists

D.Hi-tech experimental laboratory小题2:Up to a point, their success is due to ______.

A.hi-tech experimental facilities

B.the great pressure their school put on them

C.the increasing number of biologists

D.little interest in their regular school work小题3: The research paper will be put into English in order to ______.

A.become an English textbook

B.help the students make English friends

C.make the results known by the whole world

D.challenge foreign scientists小题4:The author’s attitude towards those students who have accomplished a world first in DNA decoding is ______.

A.indifferent

B.admiring

C.slighting

D.disappointed