When adding oil to a refrigeration system, precautions must be taken to ensure thatA.the compressor suction pressure is not too highB.all air is purged from the pump and charging fittingsC.the high pressure cutout switch is held open to prevent accidental

题目

When adding oil to a refrigeration system, precautions must be taken to ensure that

A.the compressor suction pressure is not too high

B.all air is purged from the pump and charging fittings

C.the high pressure cutout switch is held open to prevent accidental starting

D.the condenser is completely shutdown first

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1.9． _______you _______ stay at home today?A． Do ; have toB． Must; have toC． Have; toD． Do ; must

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3.I am committed _______ part in the meeting.A、to takingB、to takeC、takingD、taken

4.[A\] ensure\[B\] assure\[C\] insure\[D\] reassure

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    It's useless to ( ) her that she doesn't need to lose any weight.

    A.believe

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    C.say

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    正确答案：B

  • 第2题：

    It should be ______ that any maritime liens attaching to the ship at the time of her arrest have priority over the claim for which she was arrested．

    A.noted

    B.seen

    C.watched

    D.taken


    正确答案：A

  • 第3题：

    Consequently，a sustainable business model can______companies to better adapt to complex environments and achieve sustainable competitive advantages。

    A.render
    B.enable
    C.cause
    D.ensure

    答案：B
    解析：
    本题考查近义词辨析。题目意为“因此，一个可持续的商业模式能够使企业更好地适应复杂的环境，实现可持续的竞争优势。”A选项“致使，补偿”，B选项“使能够，使可能”，C选项“引起，造成”，D选项“保证，确保”。空格后面有to，所以空格填一个能接to的动词。固定搭配enable sb/sth to do sth，使可能，B选项正确。
    　　

  • 第4题：

    3．—__________ 1 go out for a while?

    —No，you __________ You must finish your homework first．

    A． Must，needn't

    B． Can，may

    C． May，mustn't

    D． May，must


    正确答案：C

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    Information on shipping movements can be______by radio from Dover Port Control．

    A.got

    B.made

    C.obtained

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    船舶运输的信息能够通过Dover港口管制被获得。

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    Care providers also need to help patients to manage their feelings of uncertainty and______them of the benefits of modern medicine and technology which can substantially aid in health improvement。

    A.assure
    B.insure
    C.sure
    D.ensure

    答案：A
    解析：
    本题考查同根词义辨析。题目意为“护理提供者还需要帮助患者应对他们的不确定感，并向他们保证当前现代医学技术可以极大地促进健康改善，而他们可以从中获益。”A选项“使确信，向……保证”，B选项“为……投保”，C选项“确信的，有把握的”， D选项“保证，确保”。固定搭配assure sb. of ，意为“使某人确信，向某人保证”。
    　　

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