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. Burlier 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 50mw. / 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 (运动感应器)would turn on the magnetron, filling the room with low-power microwaves. In the same way that a microwave 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(家畜) 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?

单词拼写（共10小题；每小题1分，满分10分）
【小题1】Don’t be late for your i__________, or you won’t get the job.
【小题2】She a__________ that she had stolen the bicycle.
【小题3】Man should protect w__________ for his own existence.
【小题4】Tom works so hard, so he will s_________ sooner or later.
【小题5】In English learning, you should a______ the importance to memory.
【小题6】We will buy some new flowers to r_________the old ones in the room.
【小题7】Dave didn’t r_______to any of her emails,which made her angry.
【小题8】 If you want to sell your old furniture, why not put an a ______in the local newspaper.
【小题9】It is a rule that our baggage should be i____________by customs officers.
【小题10】C______ among middle school students to enter the best colleges is intense (激烈的).

根据下列句子及所给单词的首字母，写出各单词正确的完全形式(每空限写一词)。

1.In Ireland there are two o______________ languages: English and Irish.

2.He i______________ all the “No Smoking” signs and lit up a cigarette.

3.Internet makes it possible for us to c______________ with our friends from all over the world.

4.As a result of the severe earthquake in Wenchuan, people s______________ great losses.

5.This atlas (地图集) contains fifty maps, i______________ six of North America.

6.He looks honest, but a______________ he is a rogue (a man who is dishonest and immoral).

7.After so many years, I still r______________ him as soon as he came in the room.

8.Two hours later, I f______________ came up with a good idea to solve the problems.

9.If you want to pass your exams, you’d better change your a______________ towards study.

10.You won’t get well unless you follow your doctor’s a______________.

阅读下面短文，从短文所给各题的四个选项（A、B、C、D）中选出能填入相应空白处的最佳选项。

   Newcomers（新来的人） to the United States are often    36    by the schools. American schools    37    seem so different from the schools they know in    38    parts of the world. American education is based on the    39    that children    40    to learn to think    41    themselves. The school should be the    42    where they learn to do this.    43   , children learn the “three R’s” [(Reading, Writing and Arithmetic(算术)], history and government (often called Social Studies) and many other    44   . They also learn    45   be independent(独立的)，how to make their own judgement(判断), and how to develop their own   46    and interests. The American teacher does not    47   the children in her class to sit    48   hands folded quietly and to say    49  . She wants them to listen attentively(专心地) to ask questions. She knows that    50    children learn from books is    51  . She also knows that it is necessary for them to know how to use this    52   for their   53    and development. During Open School Week, parents have a    54    to see how American education    55   .

A. happy          B. afraid               C. glad             D. surprised

A. some time    B. sometime         C. sometimes            D. some times

A. other          B. the other            C. another              D. all

A. opinion      B. idea                 C. promise          D. conclusion

A. need           B. needed               C. dare                 D. dared

A. of             B. against          C. for                  D. with

A. place        B. space            C. room             D. area

A. From school    B. out school           C. By school            D. In school

A. lessons       B. knowledge       C. subjects             D. object

A. when to       B. how to           C. what to              D. where to

A. ability        B. skill                C. abilities            D. skills

A. think         B. want                 C. let              D. make

A. with          B. across               C. over             D. above

A. something      B. anything             C. nothing              D. much

A. that          B. which            C. where                D. what

A. important     B. unimportant      C. necessary            D. useless

A. study         B. work             C. learning             D. aim

A. growing        B. growth           C. future               D. tomorrow

A. ability            B. possibility          C. interest             D. chance

A. develops      B. learns               C. goes             D. works

单词拼写

根据句子及所给首字母，写出空缺处各单词的正确形式。（共5小题；每小题1 分， 满分5分）

1. Go back home now, Mary. Your parents are c______ about you.

2. The mother felt very u_____ because his son failed in the final exam.

3. After returning from America, the old man s________ in Beijing.

4. I r　　　　him as soon as he came in the room, though I hadn’t seen him for years.

5. She looks young, but a__________ she’s over 50.