题目
题型：不详难度：来源：
Using microwaves to directly heat owners of a room would save much of the energy wasted by heating walls and furn
iture. 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. |
| A．20 mw. / sq. cm. | B．40 mw. / sq. cm. |
| C．60 mw. / sq. cm. | D．85 mw. / sq. cm. |
| A．The magnetron. | B．The motion detector. |
| C．The microwave oven. | D．The radiation-absorbing chemical. |
| 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 prot ect their lambs in winter. |
| D．Microwave heaters cannot be accepted by the public because they are somewhat unsafe. |
答案
解析
核心考点
试题【 Microwaves may be great at warming up food, but what about warming people? Usi】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
Some people who find themselves unable to solve a problem react by just giving up. But it is not good to 36 problems by giving up or make excuses for 37 . You may be sure that all young people 38 the same difficult process that you are going through: meeting new situations, developing new skills, and testing their abilities.
If you are unhappy about something, face it. Try to 39 the problem in a few words, so that you will know exactly what you are 40 . Then see if you can “put you finger” on the 41 of your unhappiness.
In many cases, we only “think” there is no 42 to a particular problem. But often we can 43 the problem and achieve the goal by making a direct 44 .
For example, a boy wanted to be a debater(辩论家). When he tried for the debating team as a 45 , the coach thought he was 46 . He was shy; he had a high-pitched voice and his posture(姿态) was poor. Although he was given little hope of success, he took 47 of every 48 to debate. He studied from successful speakers and 49 his own weakness and assets. Then he 50 many hours learning all the facts on the topics for the debate, and worked at developing good posture and at speaking clearly. In his junior year, he made the school 51 team, and in his senior year, he was on the winning team in his state. He 52 his goal because he had made a direct attack on his problem.
53 direct attack is often the best way to face problems, we have to be 54 in judging situations and sometimes it is necessary to 55 the goal. So it is important to study the situation and make a wise decision about what to do.
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Dinosaurs died out about 65 million years ago. Today scientists work to solve the mysteries of these ancient animals.
Footprints, or tracks(脚印), are an important way to learn about dinosaurs. Christian Meyer of the Natural History Museum in Basel, Switzerland, calls dinosaur tracks “the closest thing to a movie” of dinosaurs.
“They tell us something about the size of the animal, the way they were walking…they tell us something about their speed,” Meyer said.
Tracks also show that dinosaurs sometimes traveled in groups. Traveling in groups probably helped dinosaurs protect themselves from enemies. Plus, some meat-eating dinosaurs may have hunted in groups, much like wolves do today. Bein
g in a group could help dinosaurs work together to kill large animals.Dinosaur footprints can be as small as a few inches across, but they can also be as big as a few feet across. Dinosaur footprints have been found throughout the world at ove
r 1,500 sites, including a T. Rex footprint in New Mexico. “Trackways” are groups of footprints.And scientists aren’t the only ones finding dinosaur tracks—kids can, too! Eleven-year-old Mark Turner and nine-year-old Daniel Helm discovered dinosaur tracks in British Columbia, anada. Soon scientists began studying the tracks.
Scientists and other people interested in studying dinosaurs are working to save the trackways from activities like construction and mining.
小题1:The passage mainly tells us that_______.
A. there were really dinosaurs on the earth millions of years ago
B. dinosaurs were the most frightening animals in the past
C. dinosaur footprints are important in learning about dinosaurs
C. why dinosaurs died out millions of years ago
小题2:By studying footprints scientists can know the following EXCEPT _______.
| A．how big the dinosaur was | B．what color the dinosaur was |
| C．how fast the dinosaur could run | D．how the dinosaur walked |
| A．made the hunting of large animals easily |
| B．could travel a long way without being lost |
| C．could protect themselves from being hunted by wolves |
| D．could get to a place faster |
| A．are helpful to the study of dinosaurs |
| B．can help scientists solve many mysteries |
| C．can lead to the discovery of the footprints |
| D．can destroy the footprints of the dinosaur |
That’s the experience thousand of Londoners had when they crossed paths with “ Snowball in Summer,” Goldsworthy makes sculpture （雕塑）from all sorts of things he finds outside – leaves, earth, and rocks, as well as ice and snow. He wanted to find out how busy people would react to an unexpected snowball melting in their midst.
During the winter of 2008, he rolled 13 giant snowballs near his home in Scotland. He filled each one with a surprise in the center – such as berries, feathers, little stones or sheep’s wool – which would appear as the snow melted. The finished snowballs were stored in a deep freeze until summer, then transported to London in refrigerated trucks. At midnight on June 21, 2008, while the city slept, Goldsworthy and his helpers rolled their snowballs into place.
People walking to work or school must have thought the sky was falling when they stumbled across snowballs the size of baby elephants. Some of them had never even seen snow in real life, and they couldn’t help touching them in great surprise. As the snow started to melt, things got even more interesting. The perfectly round snowballs took on different shapes as the stuff inside began to poke through. Two days later, most of Goldsworthy’s snowballs were gone, and their fillings scattered. But Londoners were left with a really good story about that odd summer day when the snowball came.
小题1:What is really special about the snowballs is that ______________________.
| A．they lie in the street |
| B．they are in the shape of baby elephants. |
| C．they have berries, feathers, little stones and feathers in them. |
| D．they appear in June. |
| A．To find out people’s reactions to them |
| B．To call up people’s memory of the cold winter. |
| C．To show off his skills in sculpture. |
| D．To let people experience the cold winter. |
sworthy and his helpers roll their snowballs into place at mid-night?A. They didn’t want to disturb other people.
B. It was quite at that time.
C. They wanted to avoid the traffic jam.
D, They wanted to give people a surprise.
and other media that offer a lot more colorful entertainment. Books are history!" But don"t be fooled. There"s still a lot to be said for reading.One clear reason is that a well-chosen book is a wonderful source of vocabulary, so long as you have a good dictionary, of course. Believe me, it"s far easier to get new English words and phrases from a book or article than it is from the TV or the Internet.
But an even more important point is that books give you something that modern media simply can not. The average webpage is picture-heavy and the text is often designed to make it as easy to read as possible. While "easy" may be attractive, unfortunately it"s little use for many long-term develo
pment 
of reading skills and the general language level. For that, there"s still no substitute (替代品）of a book.But perhaps the best single reason is that simply choosing what you read and doing it independently means that it"s something you do by yourself. You can choose what you want to read. It"s hard work, but something down the line, you will find that what once seemed like a duty is now a pleasure. We asked three bookworms -- an English teacher, a book editor and a film critic - to pick some favorite reads for you.
小题1: How many reasons for reading a book does the author mention in the passage?
| A．One | B．Two | C．Three | D．Four |
| A．computer | B．dictionary | C．notebook | D．pencil |
| A．develop long-term reading skills | B．improve the general language ability |
| C．not take the place of reading books | D．be an effective way of reading |
| A．share the pleasure of reading books | B．advise readers to read books |
| C．stress the importance of reading online. | D．help readers to choose good books. |
An old song says that " love makes the world go around" If you watch Americans on Valentine"s Day, you can believe it. The whole country breaks out with little red hearts. Lovestruck people give cards, flowers and candy to their sweethearts.
The American concept of love and romance begins with dating. Young people date in several ways. At first they might have group dates with several boys and girls together. Later, they start going on single date - just one boy and one girl.
When two couples go out together, it"s called double dating. A friend might even arrange a blind date for you with someone you don"t know who your partner will be until the time of the date.
American young people see a date as a time just to have fun. They don"t always have a romantic interest in mind. Someone may go out with one person this week, and another the next. After a while, a boy and a girl may decide they want to go steady. This means they think of each other as boyfriend and girlfriend. It also
means they don"t want to date anyone else. Romance is beginning to bloom.Romance love is v
ery much a part of American culture. Movies, TV shows and books in America all picture people falling in love. Actually, people all over the world search for happiness in a loving relationship. Maybe love does make the world go around. 小题1: How do you understand the understand sentence in the first paragraph?
| A．Many young people"s hearts break in America that day. |
| B．You can see many pictures of little red hearts all over America that day. |
| C．People all over the world show their hearts to each other that day. |
D．people go out with their warm hearts t hat day |
nds of dates a
re mentioned in the passage?| A．2 | B．3 | C．4 | D．5 |
| A．You can not see who is your partner during the date. |
| B．The partner of your date is a stranger. |
| C．Your date is arranged secretly. |
| D．You will not know your partner until the date begins. |
hich of the following statement is true about American"s view of romantic?| A．Romance love is the most important thing in the world |
| B．People all over the world search for romance love |
| C．Date is one thing, romantic is another. |
| D．They can find their ideal love in movies, TV shows and books |
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