______ play a very important part in hydraulic systems by preventing interaction between different parts of the hydraulic circuit.A.MotorsB.Check valvesC.Safety valvesD.Reducing valves

题目

______ play a very important part in hydraulic systems by preventing interaction between different parts of the hydraulic circuit.

A.Motors

B.Check valves

C.Safety valves

D.Reducing valves

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4.PART CDirections: You will hear three dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each question by choosing A, B, C or D. After listening, you will have 10 seconds to check your answer to each question. You will hear each piece ONLY ONCE.听力原文： The piano and violin are girls' instruments. Drums and trumpets are for boys. According to Psychologists Susan O' Neil and Michael Bottome, children have very clear ideas about which musical instruments they should play. They found that despite the best efforts of teachers, these ideas have changed very little over the past decade. They interviewed 153 children, aged between 9 and 11, from schools in northwest England. They asked them to identify four musical instruments and then say which they would like to play most and which they would least like to play. They also asked the children for their views on whether boys or girls should not play any of the four instruments. The piano and violin were both ranked more favorably by girls than by boys, while boys preferred the drums and trumpets. There was a broad agreement between boys and girls on which instruments each sex should play and the reasons varied. And while almost half of all boys said they avoided certain instruments because they were too difficult to play. Only 15 percent of girls gave that as a reason. Earlier studies indicated that very young school children aged between 5 and 7, showed no bias in choosing musical instruments. But their tastes become more clear between the ages of 8 and 10. One survey of 78 teachers suggested that after that age, both boys and girls begin to restrict themselves to the so-called male or female instruments.How many children did Susan and Michael interview?A．150.B．151.C．152.D．153.

更多“______ play a very important part in hydraulic systems by preventing interaction between d ”相关问题

  • 第1题：

    VIP是以下哪组词的翻译

    A. Very important place

    B. Very interesting person

    C. Very important person

    D. Very interesting place


    正确答案：C

  • 第2题：

    It is very important for us to find a () between work life and home life.

    A.way

    B.balance

    C.blank


    正确答案：B

  • 第3题：

    ______ is not usually used in liquid cargo systems．

    A.Hydraulic drive systems

    B.Electric drive systems

    C.Steam drive systems

    D.Man-powered drive systems


    正确答案：D

  • 第4题：

    When the students listen to recorded materials there is very little opportunity for immediate interaction.（）


    正确答案:正确

  • 第5题：

    VIP是以下哪组词的翻译。（）

    • A、Very important place
    • B、Very interesting person
    • C、Very important person
    • D、Very interesting place

    正确答案:C

  • 第6题：

    单选题
    Which of the following hydraulic systems is not one of the three sub-division of the Hydraulic drive system?（）
    A

    Constant pressure system

    B

    Variable pressure system

    C

    Variable displacement system

    D

    Constant volume system


    正确答案： D
    解析： 暂无解析

  • 第7题：

    单选题
    （） play a very important part in hydraulic systems by preventing interaction between different parts of the hydraulic circuit.
    A

    Motors

    B

    Check valves

    C

    Safety valves

    D

    Reducing valve


    正确答案： B
    解析： 暂无解析

  • 第8题：

    单选题
    In which of the listed hydraulic systems will the installation of an oil cooler be necessary?（）
    A

    Constant tension mooring winch system

    B

    Hatch cover system

    C

    Watertight door system

    D

    Internal combustion engine hydraulic starter system


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    He （） a very important part in the management of the company.
    A

    takes

    B

    plays

    C

    keeps


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    From the passage, we can draw a conclusion that _____.
    A

    family has deep influence on a person

    B

    compliments are very important to a person

    C

    one should treasure the relationship between others

    D

    when facing tough time, one should never say die


    正确答案： D
    解析：
    推理题。根据全文内容可知，本文主要讲述了作者在孩童时期的经历对他以后生活所造成的影响：他成年后不会称赞别人的性格特点都是由于他童年时期的经历造成的饿，童年时期作者是长子，承担起了协助养家糊口的重任，但同时他也只是个孩子，渴望得到母亲的关爱，但是他表露出对弟妹们的支持和鼓励只能让自己更失去母亲的关爱。由此可以推断出A选项的说法正确，其他三项都不是文章的中心和意图所在。因此，本题的正确答案为A。

  • 第11题：

    单选题
    What can we learn from the passage?
    A

    It may be difficult for the young to learn new skills.

    B

    Dogs play an important part in language and culture.

    C

    We can be successful if we learn from our own mistakes.

    D

    Dogs like the hottest days in summer very much.


    正确答案： B
    解析：
    本题是推断题。全文主要介绍了许多和狗有关的习语，由此可以看出，狗在英语文化中有着特定的含义，因此B项正确。文章说道老年人学习新技能很慢，但并没有提到有关青少年学习新的技能的事情，因此A项错误。文章第二段第三句说“想要成功，就得工作的很努力才行”，所以C项“想要成功，我们就必须从错误中吸取教训”是错误的。D项“狗非常喜欢夏天最热的那几天”文章并未提及，因此可以排除。

  • 第12题：

    单选题
    If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
    A

    a low load on the unit

    B

    a clogged pump suction strainer

    C

    a blockage in the line between the pump and hydraulic motor

    D

    the hydraulic motor turning too fast


    正确答案： C
    解析： 暂无解析

  • 第13题：

    Parents play a very important __________ in their children's education.

    A、classmate

    B、offer

    C、ripe

    D、role


    正确答案：D

  • 第14题：

    His parents can play the drums very well．（对划线部分提问）

    _______ _______ his parents play very well?


    正确答案：
    44.What can 

  • 第15题：

    Even though its economy continues to recover,the US is increasingly becoming a nation of part‐timers and temporary workers.This“disposable”work force is the most important（ ）in American business today,and it is fundamentally changing the relationship between people and their jobs.

    A.approach
    B.flow
    C.fashion
    D.trend

    答案：D
    解析：
    trend“潮流，趋势”。常指发展的方向或是社会发展的潮流。句意：这种“可任意处置的”劳动力在当今美国商界是最重要的动向。A.approach“办法，靠近”；B.flow“流动”；C.fashion“时尚；风气；式样”，一般是指受到人们极大注意或崇尚的事件，如时装潮流等

  • 第16题：

    He （） a very important part in the management of the company.

    • A、takes
    • B、plays
    • C、keeps

    正确答案:B

  • 第17题：

    单选题
    What is the text about?
    A

    Advertisements are the most important part in newspapers.

    B

    It introduces newspapers past and today and its contents.

    C

    There is a lot of useful information on newspapers.

    D

    People like newspapers very much.


    正确答案： A
    解析：
    主旨大意题。本文首先介绍了过去和现在的报纸，紧接着说了报纸的内容，故答案选B。

  • 第18题：

    单选题
    A reservoir, as used in hydraulic systems aboard ship, is used to store hydraulic oilAnother function is to（）
    A

    act as a shock absorber

    B

    maintain the stored oil under pressure

    C

    act as a base or foundation for the power unit

    D

    eliminate pressure surges in the system


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    It is important with all hydraulic systems to ensure that interlocking arrangements provided for pump or motor control levers are （） before the pump driving motor can be started.
    A

    in the pert position

    B

    in the starboard position

    C

    in the neutral position

    D

    to be dismantled


    正确答案： B
    解析： 暂无解析

  • 第20题：

    填空题
    The body has several different systems to create ATP, because it is very important.____

    正确答案： E
    解析：
    根据题干信息“different systems”可以定位到E段“Because ATP is so important, the body has several different systems to create ATP”，故匹配段落为E段。

  • 第21题：

    单选题
    To play fair is as important as _____.
    A

    we play well

    B

    playing well

    C

    to play well

    D

    well to play


    正确答案： A
    解析：

  • 第22题：

    单选题
    The film of oil between the rings and the liner is not only essential for the lubrication but also （） achieving a gas seal.
    A

    play a great part on

    B

    run a role in

    C

    plays an important part in

    D

    acts as important part at


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    The author of The Portrait of a Lady is best at _____.
    A

    probing into the unsearched secret part of human life

    B

    a truthful delineation of the motives, the impulses, the principles that shape the lives of actual men and women

    C

    dramatizing the collisions between two very different cultural systems on an international scene

    D

    disclosing the social injustices and evils of a civilized society after the Civil War


    正确答案： C
    解析：
    《一个女士的画像》的作者亨利·詹姆斯以一系列关于美国人到欧洲及在欧洲的遭遇为体裁的小说而闻名。

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