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    Far from the land of Antarctica(南极洲), a huge shelf of ice meets the ocean. At the underside of the shelf there lives a small fish, the Antarctic cod.
    For forty years scientists have been curious about that fish. How does it live where most fish would freeze to death? It must have some secret. The Antarctic is not a comfortable place to work and research has been slow. Now it seems we have an answer.
    Research was begun by cutting holes in the ice and catching the fish. Scientists studied the fish’s blood and measured its freezing point.
    The fish were taken from seawater that had a temperature of -1.88℃ and many tiny pieces of ice floating in it. The blood of the fish did not begin to freeze until its temperature was lowered to -2.05℃. That small difference is enough for the fish to live at the freezing temperature of the ice-salt mixture.
    The scientists’ next research job was clear: Find out what in the fish’s blood kept it from freezing. Their search led to some really strange thing made up of a protein(蛋白质) never before seen in the blood of a fish. When it was removed, the blood froze at seawater temperature. When it was put back, the blood again had its antifreeze quality and a lowered freezing point.
    Study showed that it is an unusual kind of protein. It has many small sugar molecules(分子) held in special positions within each big protein molecule. Because of its sugar content. It is called a glycoprotein. So it has come to be called the antifreeze fish glycoprotein. Or AFGP.
    小题1:What is the text mainly about?
    A．The terrible conditions in the Antarctic.
    B．A special fish living in freezing waters.
    C．The ice shelf around Antarctica.
    D．Protection of the Antarctic cod.
    小题2:Why can the Antarctic cod live at the freezing temperature?
    A．The seawater has a temperature of -1.88℃.
    B．It loves to live in the ice-salt mixture.
    C．A special protein keeps it from freezing.
    D．Its blood has a temperature lower than -2.05℃.
    小题3:What does the underlined word “it” in Paragraph 5 refer to?
    A．A type of ice-salt mixture.B．A newly found protein.
    C．Fish blood.D．Sugar molecule.
    小题4:What does “glycol-” in the underlined word “glycoprotein” in the last paragraph mean?
    A．sugarB．iceC．bloodD．molecule

    小题1:B
    小题2:C
    小题3:B
    小题4:A

    在南极洲冰块与海洋交汇之处，生活着一种叫Antarctic cod的一种鱼。是什么原因能让这种鱼生活在如此寒冷的地带呢？
    小题1:主旨大意题。本文主要讲述的就是在冰水中生活的一种鱼。
    小题2:细节理解题。倒数第二段，第一句，可知选 C。
    小题3:细节理解题。由倒数第二段，可知。此处是指上文由蛋白质组成的东西。
    小题4:猜测词意题。由最后一段because of its sugar content, … … 由于糖的含量可知
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    科目：高中英语 来源：不详 题型：阅读理解

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