问题 问答题 简答题

简述104集成电空制动机制动后的阶段缓解作用。

答案

参考答案:

104集成电空制动机置制动后的阶段缓解:由于容积室压力空气排大气的通路受到保压电磁阀的控制,所以尽管分配阀是一次性缓解阀,在它处于缓解位时,可以通过保压电磁阀的间断得失电,控制着容积室的阶段性排气,而104型分配阀为间接作用式,制动缸的压力又受容积室压力的控制,故保压电磁阀的间断得失电,也就控制了制动缸的阶段排气,制动缸得以阶段缓群。

单项选择题
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Even before World War Ⅱ ended in 1945,many world leaders dreamed of a new organization that would keep international peace and safety,and encourage international cooperation(合作).An organization was formed.The United Nations was to work to this ideal of mankind.

When the UN was founded in 1945,it was made up of fifty members.Fifteen members sat on the Security Council(安理会).Five members—the United States,the Soviet Union,Great Britain,France and China—were given,not changing membership on the Council.The Council was given the power to settle fights among nations by persuasion,mediation(调解) or other means.A General Assembly(联合国大会),which included every UN member,was also set up.The Assembly could consider,discuss,and pass resolutions(决议案).

As the UN passed its fortieth birthday in 1985,it came under increasingly sharp attack by Americans.It declared that the UN is unfit as a peace keeper and cited(援引) 130 wars since 1945 as a proof(证据).

The UN’s supporters say that the organization is the world’s best hope for peace.The UN provides,supporters also point out,much needed economic and technical help to less developed nations.

小题1:The function(功能)of the Security Council is ________.

A.to keep international peace and security and promote(促进) international cooperation

B.to consider,discuss,and pass on blinding resolutions

C.to settle disputes(争端) among nations by persuasion,mediation or other means

D.to keep international peace and security by force小题2:Why has the UN come under increasingly sharp attack by Americans since 1985?

A.Because the UN has been unfit as a peace keeper.

B.Because 130 wars have broken out since 1945.

C.Because the US hasn’t been able to control the UN completely since 1985.

D.Because the US was not satisfied with the UN since 1985.小题3:What do you think of the UN’s supporters’ words?

A.They are fair.

B.They are unfair.

C.They are for the UN’s supporters.

D.They sharply attack Americans.小题4:The UN’s supporters ________.

A.probably belong to the third world

B.are developed countries

C.must be people from Africa and Europe

D.may not be members of the UN