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      Microwaves may be great at warming up food, but what about warming people?
    Using microwaves to directly heat owners of a room would save much of the energy wasted by heating walls and furniture. And despite popular ideas about microwaves, this technique would be safe, according to Charles R. Buffler of the Microwave Research Center in Marlborough, New Hampshire. Low-power microwaves only penetrate (贯穿) the skin (low-power microwave penetration in a ham is about 0.2 inches, for example) and with no negative effects.
    To test this idea, Buffler subjected himself to microwaves in a special room using a standard 500-watt, 2459 MHz magnetron (磁控管). He found that a person will start to feel warmth at about 20 milliwatts per square centimeter (mw. /sq.cm.); a satisfactory feeling of warmth occurs between 35 and 50 mw./sq.cm. By comparison, a person standing in noonday summer sun feels the amount of 85 mw./sq.cm. And a frozen meat pie in your microwave oven receives about 1000 mw./sq. cm.
    In houses of the future, each room could be provided with its own magnetron, says Buffler. When you stepped into the living room, for example, a motion detector would turn on the magnetron, filling the room with low-power microwaves. In the same way that a microwaves oven heats up a hamburger, but not the plate it’s on, you would feel warmth from the microwaves without changing the temperature of your coffee table. (You could, however, make your favorite easy chair even more comfortable by treating it with a radiation-absorbing chemical.)
    While it might be some time before homeowners are comfortable enough with the idea to set up whole body microwave heaters in houses, Buffler says microwaves may attract livestock farmers. Lambs that are born outdoors in winter, for example, are frequently lost to cold. Microwaves could warm the lambs safely and quickly.
    小题1: Which of the following can tell the main idea of the passage?
    A．A new heating system. B．A new microwave oven.
    C．A popular technique.D．The magnetron.
    小题2: The test conducted by Buffler shows that when a person feels comfortable warmth, he receives about ____.
    A．20 mw. / sq. cm.B．40 mw. / sq. cm.
    C．60 mw. / sq. cm.D．85 mw. / sq. cm.
    小题3: According to paragraph 4, which of the following fills the room with low-power microwaves?
    A．The magnetron.B．The motion detector.
    C．The microwave oven.D．The radiation-absorbing chemical.
    小题4: Which of the following statements about microwave heaters would Buffler most probably agree with?
    A．Microwave heaters will soon be widely used by homeowners.
    B．Microwave heaters sometimes make people feel uncomfortable.
    C．Microwave heaters will be probably first used by livestock farmers to protect their lambs in winter.
    D．Microwave heaters cannot be accepted by the public because they are somewhat unsafe.
    小题1:A小题1:B小题1:A小题1:C
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    科目：高中英语 来源：不详 题型：阅读理解

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    科目：高中英语 来源：不详 题型：阅读理解

    阅读理解E
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    科目：高中英语 来源：不详 题型：阅读理解

    The two-week vacation at the end of summer school ended yesterday. Kevin had gone nowhere during his vacation. He had the money, but he hated to travel alone. He used to take vacations with Gary, his youngest brother, but they had a big argument at the end of their last vacation. Each of them had spent the last three years waiting for the other to apologize.
    Kevin did not feel good about being on non-speaking terms with his favorite brother. But he was not going to ask for forgiveness when, in his mind, this whole misunderstanding was his brother’s fault.
    So Kevin’s summer vacation was spent in his own “back yard.” As usual, he had planned to clean up his apartment. As usual, two weeks later his apartment looked just as it had two weeks before.
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    Kevin visited the coffee shop four times during his vacation. He always sat at a table outside by himself and read the free daily paper. Each day he was there, he read most of the newspaper articles while he enjoyed two cups of coffee.
    Between articles, he took breaks by watching the nearby traffic and pedestrians. The coffee shop was next to a huge parking lot. The lot was for customers of a grocery store, movie rental store, pharmacy, bank, and restaurant. Kevin considered his outdoor seat the perfect place for one of his favorite activities—people watching.
    The coffee shop, with its excellent location and coffee, had helped make his vacation a pleasant one. But he knew in his heart, had his brother been there to join him just one day, his vacation would have been a perfect one.
    小题1: Why didn’t Kevin go anywhere during his vacation？
    A．Because he was short of money.B．Because he didn’t like traveling.
    C．Because he had no company.D．Because he had to clean up his apartment.
    小题2: What did Kevin do in his vacation?
    A．He cleaned up his apartment.B．He had a big argument with Gary.
    C．He worked in a parking lot.D．He stayed at home most of the time.
    小题3: Which of the following is NOT mentioned about the coffee house?
    A．It served delicious coffee of different flavors.
    B．It had an effective air-conditioning system.
    C．It was often crowded with local customers.
    D．It provided free newspapers for customers.

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