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        The oldest and hardest cow beef may be made as tender (柔嫩) and tasty as young and choice meat. This declaration was made by the French physicist Denis Papin in his book published in 1681, which described his New Digester or pressure cooker. It was a cast iron pot with an airtight lid, which allowed liquids to boil at a higher temperature than usual, and so it cooked food in a quarter of the time. The food was cooled by pressurized steam being forced through it at about 121℃ . All pressure cookers were made of cast iron until 1905, when the first aluminum(铝) model was made in America．In 1938, Alfred Vischer, a man from Chicago, U. S. A., designed a simple interlocking pan and lid, and an improved pressure - tight seal (密封)—a replaceable rubber sealing ring. When Vischer’s patent(专利) expired in 1954, many companies entered the field, and the rapid pressure cooker became popular with people who had little time to cook or had to supply food for unexpected guests.

    1. Which of the following shows the correct order of what happened?

    a- Denis Papin called his invention "New Digester".

    b- It began to be widely used by common families.

    c- Instead of cast iron, it was first made of aluminum.

    d - The first pressure cooker was invented in France.

    e- Alfred Vischer greatly improved its design.

    f - Vischer’s patent came to an end.

    g- Many other companies began to produce it.

    A．d, a, e, c, g, f, b

    B．a, d, c, b, e, f, g

    C．d, a, c, e, f, g, b

    D．g, c, a, e, d, f, b

    2. In the writer’s opinion, the best advantage of a pressure cooker is that ________.

    A．the oldest and hardest cow beef can be made tender and tasty

    B．it allows liquids to boil at a higher temperature than usual

    C．it can help people to supply food for unexpected guests

    D．it helps people spend much less time in cooking

    3. The best title of this passage would be ________.

    A．New Digester

    B．Pressure Cooker

    C．Favorite Cooker

    D．The History of Cooker

     

    答案：C;D;B
    提示：

    		1.       主要看最后几个选项，b开始被普通家庭所使用，g很多公司开始生产，自然是b比g要靠后，f这项发明彻底结束，与g相比f靠前，这样就能判断出选择C

    2.       ABC选项都不是最重要的作用，选择D

    3.       整篇文章都介绍的是高压锅的发明及普及，选择B

     


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