. The United States of America one of the most developed countries in the world. A.is B.are C.was D.were 题目和参考答案——青夏教育精英家教网—

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. The United States of America___one of the most developed countries in the world.

A.is B.are C.was D.were

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Space is a dangerous place. not only because of meteors (流星) but also because of rays from the sun and other stars. The Atmosphere again acts as our protective blanket on earth. Light gets through, and this is essential for plants to make the food which we eat. Heat, too, makes our environment endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.

Radiation is the greatest known danger to explorers in space. The unit of radiation is called “rem”. Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage-a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed (畸形的) children or even grandchildren. Missions of the Apollo flights have had to cross belts of high radiation and, during the outward and return journeys, the Apollo crew accumulated a large amount of rems. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.

1. According to the first paragraph, the atmosphere is essential to man in that ______.

A. it protects him against the harmful rays from space

B. it provides sufficient light for plant growth

C. it supplies the heat necessary for human survival

D. it screens off the falling meteors

2. It can be inferred from the passage that ________.

A. the Apollo mission was very successful

B. protection from space radiation is no easy job

C. astronauts will have deformed children or grandchildren

D. radiation is not a threat to well-protected space explorers

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

A. The Atmosphere and Our Environment B. Research on Radiation.

C. Effects of Space Radiation D. Importance of Protection Against Radiation

On the IraqSyria border，a pack of wild dogs circled American soldiers for food．The leader of the pack was a grayandwhite dog．The soldiers called him Nubs．Nubs was shaking and __36__ able to stand．Marine major Brian Dennis looked closer and saw that there was a knife wound __37__ his chest．
Dennis couldn’t stand seeing the dog __38__．He and his men immediately treated the wound，and gave Nubs medicine．Nubs__39__but was still in pain．The next day，the team had to__40__．Ten days later，Dennis’s unit was back，and so was Nubs．He was still___41__，but the men fed him and played with him．
Before long the unit once again__42__an outpost (前哨) 70 miles away．Nubs，slowly but determinedly，__43__them far into the trackless wasteland until the men lost__44__of him．Two days later，beyond Dennis’s__45__，he saw Nubs just outside the outpost．The dog had tracked him across 70 miles of frozen desert to__46__with the friend who had saved his life．From then on Nubs and the men slept in the same place，and ran around in the same ruins．
Until an order came down from above that they were not__47__to have pets. Dennis__48__to make sure the dog would continue to live the__49__life．So he quickly raised $4,000 from his family and friends to fly Nubs to__50__．
A month later，when Dennis and the dog were__51__in California，at first Nubs didn’t recognize the guy．__52__within minutes，the dog jumped into Dennis’s arms，jumping up again and again to__53__ his friend’s face．
A little__54__and concern in the middle of war will not save a violent world．But small stories，like the story of a soldier and a dog，hold a promise of a(n) __55__world．

Simply by analyzing a drop of blood, a doctor will be able to diagnose a birth defect or even cancer when it is in the early stage; using new technology, a material lighter but much stronger than steel can be produced.
These may sound like dreams at present. But the dreams may soon come true as research findings in laboratories are being turned into products more rapidly in the new century, according to experts participating in the fourth Asia-Pacific Economic Cooperation (APEC) Technomart, a technology exhibition and trade fair in Suzhou.　　
"Most people think nano-technology（纳米技术）is too far-fetched to be real. But in fact nano-technology has been applied in a wide range of fields, such as medicine. It is coming into our daily life," said Cheng Jiachong from a Hong Kong-based nano-technology firm.
Nano-technology based on the nanometer, the unit of which is a billionth of a meter, enables scientists to have new concepts of disease diagnosis and treatment on a molecular（分子）and atomic scale, Cheng said.　　
By using nanometer particles, a doctor can separate the fetus cells（胚胎细胞）from the blood of a pregnant woman to see if the development of the fetus is normal. This method is also being used in the early diagnosis of cancer and heart disease, he said.　　
One of the most significant impacts of nano-technology is at the bio-inorganic materials interface, according to Greg Tegart, executive advisor of the APEC Center for Technology Foresight.　　
"By combining enzymes（酶）and silicon chips we can produce biosensors. These could be implanted in humans or animals to monitor health and to deliver corrective doses（剂量）of drugs," he told the participants a technology forum during the exhibition.　　
"Nano-technology could affect the production of nearly every man-made object, from automobiles, tires and computer circuits（电路）, to advanced medicines and tissue replacement, and lead to the invention of objects yet to be imagined," said David Minns, a special advisor to the National Research Council of Canada.　　
It has been shown that carbon nano-tubes are ten times as strong as steel, with one sixth of the weight, and nano-scale systems have the potential to make supersonic transport cost- effective and to increase computer efficiency by millions of times, he said.
The experts agreed that the APEC technology exhibition and trade fair provided many chances for exchanges of innovative ideas and products.
【小题1】Realization of the dreams mentioned in the first paragraph will mainly base on ________.

A．APEC	B．Chinese scientist
C．the APEC Center for Technology Foresight	D．Nano-technology

【小题2】The length of a nanometer equals to ______.

【小题3】We can imply from what David Minns said that _________.

A．Nano-technology could only be used to invent new objects.

B．Nano-technology could be widely used to produce or invent objects.

C．Nano-technology is a money-consuming technology.

D．Nano-technology can not be used to improve the service of Internet.

【小题4】Compared to steel, carbon nano-tubes are ________.

A．stronger and lighter	B．lighter but as strong
C．stronger but as light	D．poor in quality

I cheated on a unit test in math class this morning during second period with Mr. Burke. Afterward, I was too sick to eat lunch just thinking about it.

I came straight home from school, went to my room, and lay on the floor trying to decide whether it would be better to run away from home now or after supper. Mostly I wished I was dead. It wasn't even an accident that I cheated.

Yesterday Mr. Burke announced there'd be a unit test and anyone who didn't pass would have to come to school on Saturday, most particularly me, since I didn't pass the last unit test. I did plan to study just to prove to him that I'm plenty smart—which I am mostly—except in math.

Anyway, I got my desk ready to study on . Just when I was ready to work, Nicho came into my room with our new rabbit and it jumped on my desk and knocked the flashcards all over the floor. What a mess! Nicho and I finally took the rabbit outside but then Philip came to my room and also Marty from next door and before long it was dinner.

After dinner my father said I could watch a special on television if I'd done all my homework. Of course I said I had. That was the beginning. I felt terrible telling my father a lie about the homework.

It was nine o'clock when I got up to my room and that was too late to study for the unit test so I lay in my bed with the light off and decided what I would do the next day when I was in Mr. Burke's math class not knowing the 8- and 9-times tables. So, you see, the cheating was planned after all.

The next day, I'd go into class as usual, acting like things were going just great. I'd sit down next to Stanley Plummer—he is so smart in math it makes you sick—and from time to time, I'd glance over at his paper to copy the answers.

Lying on the floor of my room, I begin to think that probably I've been bad all along. It just took this math test to clinch it. I'll probably never tell the truth again. I tell my mother I'm sick when she calls me to come down for dinner. She doesn't believe me, but puts me to bed anyhow. I lie there in the early winter darkness wondering what terrible thing I'll be doing next when my father comes in and sits down on my bed.

"What's the matter?" he asks. "I've got a stomachache," I say. Luckily, it's too dark to see his face. "Is that all?" "Yeah." "Mommy says you've been in your room since school." "I was sick there too," I say. "She thinks something happened today and you're upset." That's the thing that really drives me crazy about my mother. She knows things sitting inside my head the same as if I was turned inside out.

"Well," my father says. I can tell he doesn't believe me. "My stomach is feeling sort of upset." I hedge. "Okay," he says and he pats my leg and gets up.

Just as he shuts the door to my room I call out to him in a voice I don't even recognize as my own. "How come?" he calls back not surprised or anything. So I tell him I cheated on this math test. To tell the truth, I'm pretty much surprised at myself. I didn't plan to tell him anything.

He doesn't say anything at first and that just about kills me. I'd be fine if he'd spank me or something. And then he says I'll have to call Mr. Burke. It's not what I had in mind. "Now?" I ask surprised. "Now," he says. He turns on the light and pulls off my covers. "I'm not going to," I say.

But I do it. I call Mr. Burke, and I tell him exactly what happened, even that I decided to cheat the night before the test. He says I'll come on Saturday to take another test, which is okay with me, and I thank him a whole lot for being understanding and all.

"Today I thought I was turning into a criminal," I tell my father when he turns out my light. Sometimes my father kisses me good night and sometimes he doesn't. I never know. But tonight he does.

1.After the author cheated on the math test, he felt ____________.

A．frightened because he might be caught

B．excited that he had succeeded

C．pleased that nobody knew it

D．unhappy because he had done something wrong

2.By “It wasn't even an accident that I cheated”, the author means that ________.

A．he had planned not to study before the test

B．he decided to cheat when he knew there was going to be a test

C．he decided to cheat after he had wasted the whole evening

D．he had planned to cheat with Plummer before the test

3.The author’ mother often drives him crazy because _____-.

A．She really knows what he is thinking

B．she was very strict with him

C．she doesn’t believe him

D．she asks him to come down for dinner

4.After he was informed of what he had done, the father _______.

A．scolded the author severely

B．didn’t say anything and left

C．called Mr. Burke immediately

D．let the author make a call to Mr. Burke

5.The author’s father kissed the author good night because ________-.

A．he had done something unusual

B．he promised to study math harder

C．he was willing to take a make-up test

D．he realized his mistake and had the courage to admit it

Mea and vegetables are measured in grams and kilograms . Milk and other liquid foods are measured in liters or milliliters , These units only measure quantity : they do not measure the value of the food to the body . The unit which measures the quality or value of food is the calorie, the amount of heat given off by food when it burns . This measurement tells how much energy a certain food has when it is completely used by the body .

Our bodies use varying amount of calories . The more exercise we take, the more calories we burn . If we eat food which contains more calories than we use up , then it is possible that we would increase in weight . In order to avoid becoming overweight , it is advisable to eat a balanced diet and not to eat too many foods that have a high calories rating . The table below gives you some idea of the number of calories in food .

A. Meats	B. Fruits	C. Sweets and pastries	D. Vegetable
Slice of bacon 50	Apple 70	Small chocolate bar 190	60g bean 15
Hamburger 300	Orange 60	Large chocolate bar 225	60g carrot 18
Slice of beef 100	Pear 80	Slice apple pie 300	60g potato 60
Sausage 180	Banana 80	Doughnut 200	60g onion 25
Meat pie 500	Plum 20	Scoop of ice cream 85	60g cucumber 10
Sausage roll 350	Tomato 20	Bag of potato crisps 145	60g cabbage 15

1.Which is the best title of this passage ?

A．How to measure the quality of food

B．Calories in foods

C．The units of measurement

D．How to keep fit

2.How many slices of bacon equal the same number of calories as in a sausage roll ?

A．7

B．6

C．5

D．8

3.To keep he calorie intake down , it is better to eat more ________ .

A．chocolate

B．meat pie

C．fruit

D．apple pie

4.When do you need the most calories from your diet ?

A．When we sleep	B．In working in the fields
C．While watching a play	D．After having sports

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