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    　　In many developing countries, it is difficult to keep food cool. Most areas do not have electricity to operate the devices called refrigerators to keep food coot. Within days, food often spoils or becomes unsafe to eat. This can cause disease and loss of money for farmers. However, in Nigeria, one man is working to change this.

    　　Mohammed Bah Abba, a teacher, invented a cooling device using two round containers made of clay. Mr. Abba's invention is called a Pot-in-Pot Preservation Cooling System. A small pot is placed inside a larger one. The apace between the two pots is filled with wet sand. The inner pot can be filled with fruit, vegetables or drinks. A wet cloth covers the whole cooling system. The device keeps some foods fresh for several weeks.

    　　Food stored in the small pot is kept from spoiling through a simple evaporation process (过程) . Water in the sand between the two pots evaporates through the surface of the larger pot where drier outside air is moving. The evaporation process causes a drop in temperature of several degrees. This cools the inner container and helps destroy harmful bacteria found in food.

    　　Mr. Abby started producing his cooling device in 1997. Since then, he has given mom than 20,000 devices to people in villages in Nigeria. He expects that within five years, people all over the country will be using his invention. Mr. Abba also hopes to export his Pot-in-Pot cooling system to other hot, dry nations facing similar problems.

    　　The Rolex Watch Company of Switzerland has also recognized the value of this cooling system. Two years ago, Mr. Abba received the Rolex Award(奖赏) for Enterprise. This award is given every two years. It awards people trying to develop projects aimed at improving human knowledge and well-being. Winners receive financial assistance to help develop their projects.

    1．We can conclude from the passage that Mr. Abba ________.

    [　　]

    A．altogether invented 20,000 devices

    B．didn't spend much money on his invention

    C．has exported his invention to many hot, dry countries

    D．has helped many Nigerian villagers in many different ways

    2．According to the passage, the device invented by Mr. Abba ________.

    [　　]

    A．is being used by many African villagers to keep food from going bad

    B．is popular with those who cannot afford to buy cool food

    C．is a device called a refrigerator to keep food cool

    D．is a cooling system which received an award immediately after it was invented

    3．The word “ evaporate” in the third paragraph can be replaced by ________.

    [　　]

    A．disappear
    B．boil
    C．flow
    D．pour

    4．Which of the following is inferred from the passage?

    [　　]

    A．The cooling system invented by Mr. Abba is selling well in the world market.

    B．Sooner or later Mr. Abba will be able to export his invention to some other countries.

    C．Now that Mr. Abba has received the award, the whole country of Nigeria will be using the cooling system soon.

    D．Every two years, Mr. Abba will receive money from the Rolex Watch Company of Switzerland.

    答案：B;A;A;B
    解析：

    　　1．B　导解：从文中可知，他用这种方法为村民做了2万套，想打进国际市场，至于B，他的原料是粘土，而且还得到financial assistance即经济资助，因此B项正确．

    　　2．A　导解：从第一段可知，人们在没有电、用不上refrigerator的地方用他的发明物，因此C项描述不对，而A项正确，他为村民做了两万套，还在争取让全国人用上它．

    　　3．A　导解：文中说沙中的水分evaporate，穿过表面，赶走干燥的外层空气，可见该词指水蒸发的过程．

    　　4．B　导解：A是Abba将来的打算，C项国民用上它与得奖没有联系，根据文章可推断B项正确，B是他将来的打算．


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