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  • 云南自考網(wǎng)> 試題題庫列表頁> Holonyak's colleagues thought he would fail in his research on LEDs at the time when he started it.

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    卷面總分:100分     試卷年份:2023.04    是否有答案:    作答時間: 120分鐘   

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    試題序號

    Holonyak's colleagues thought he would fail in his research on LEDs at the time when he started it.


    • A、True


    • B、False


    • C、Not Given


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    更多題目 請在 下方輸入框 內(nèi)輸入要搜索的題目:

    21.Singapore is a small state in the southeast of Asia           

    22.According to the constitution of Singapore, the president of the state is selected           

    23.Compared with people in other Asian countries, the Singapore           

    24.Several technical colleges, and a teachers college are part of           

    25.Though small, Singapore has an industry of its own and can           

    A.live a better life

    B.made up of more than 50 islands

    C.Higher education institute

    D.not by the Parliament, but by the people

    E.produce goods of various kinds

    F.have a big population


    假設(shè)你的美國朋友Mike要去你的家鄉(xiāng)旅游,請給他寫一封電子郵件,告訴他:

    1. 近期的天氣情況;

    2. 需要注意的事項;

    3. 你期待與他見面。

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    Cell Phones:Hang Up or Keep Talking?

    Millions of people are using cell phones today. In many places it is actually considered  41  (usual)not to use one. They find that the phones are more than a means of____42____(communicate)—having a mobile phone shows that they are cool and____43___(connect).

    The____44____ (explode)around the world in mobile phone use make some health professional

    worried.Some doctors are____45____(concern)that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative ____46____ (public)of such ideas.They say that there is no____47____(prove)that mobile phones are bad for your health.

    On the other hand, signs of change in the issues of the brain and head can be____48___(detect) with modern scanning equipment. What is it that makes mobile phones____49____(potential)harmful?  The answer is radiation.

    As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies.In the future, mobile phones may have a____50____ (warn)label that says they are bad for your health.So for now, it's wise not to use your mobile phone too often.

     


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