Less TV Reduce Kids WeightPALO AITO, California—“Switching off the television ma
题型：不详难度：来源：
PALO AITO, California—“Switching off the television may help prevent children from getting fatter—even if they do not change their diet or increase the amount they exercise,” US researchers said last week.
A study of 192 third and fourth grades, generally aged eight and nine, found that children who cut the number of hours spent watching television gained nearly two pounds （0.91 kg） less over a one-year period than those who did not change their television diet.
“The findings are important because they show that weight loss can only be the result of a reduction in television viewing and not any other activity,” said Thomas Robinson, a pediatrician （儿科专家）at Stanford University.
“ American children spend an average of more than four hours per day watching television and videos or playing games, and rates of childhood being very fat have doubled over the past 20 years,” Robinson said.
In the study, presented this week to the Pediatric Academic Societies’ annual meeting in San Francisco, the researchers persuaded about 100 of the students to reduce their television viewing by one-quarter to one-third.
Children watching fewer hours of television showed a significantly smaller increase in waist size and had less body fat than other students who continue their normal television viewing, even though neither group ate a special diet nor took part in any extra exercise.
“One explanation for the weight loss could be the children unstuck to the television may simply have been moving around and burning off calories,” Robinson said.
“Another reason might be due to eating fewer meals in front of the television. Some studies have suggested that eating in front of the TV encourages people to eat more,” Robinson added.
小题1: The author tries to tell us in the first two paragraphs that ____.
| A．children will get fatter if they eat too much. |
| B．children will get thinner if they eat less. |
| C．children will get fatter if they spend less time watching TV. |
| D．children will get fatter if they spend more time watching TV. |
| A．is more than four hours a day. | B．is less than four hours a day. |
| C．doubled in the last twenty years. | D．is more than on any other activities. |
| A．Children usually eat fewer while watching TV. |
| B．Children usually eat more while watching TV. |
| C．Children eat the same amount of meals while watching TV. |
| D．Children usually eat nothing while watching TV. |
| A．They usually eat more while watching TV. |
| B．They burn off fewer calories. |
| C．They change their diet while watching TV. |
| D．Both A and B |
答案
小题1:D
小题2:A
小题3:B
小题4:D
解析
举一反三
The stamps can be used normally to mail a letter,and postal officials hope they will help encourage interest in letter writing in the Internet age．“Certainly e-mail is a useful method of communication,but letters are fun in a different way,”said Hatsumi Shimizu an official in the Post Ministry．“We want to show young people that letters can be fun too．”[
While similar stamp sheets appeared in Australia in 1999 and are now sold in some nations and territories,Japan’s fondness for commemorative photos is likely to make them especially popular here．Indeed,officials had prepared 1 000 sheets but they were sold out in less than 30 minutes．Although the stamps are currently only available as a special service during the exhibition,postal officials said they may start selling them on a regular basis in the future．
小题1:The best title of this passage might be______．
| A．Never Miss a Chance to be Photographed |
| B．Your Own Face on a Postage Stamp |
| C．First Japanese Postage Stamps with a Photo |
| D．Letters are as Fun as E-mails |
| A．this service is not very expensive |
| B．the cost of this service is very high |
| C．food in Tokyo is very dear |
| D．$8．80 is a very small amount of money |
| A．to make the international postage stamp exhibition more interesting |
| B．to make more stamps for normal use |
| C．to draw interest in writing letters |
| D．to satisfy Japan’s fondness of commemorative photos |
| A．Japanese people like to take photos． |
| B．This kind of stamps must be used to mail letters． |
| C．Japanese people can get this kind of stamps easily after the stamp exhibition． |
| D．This service is more popular in Japan than in other places． |
A flash flood swept across the coastal plain about 100 miles southwest of here, killing hundreds of Moroccans in a market place yesterday morning.
Reports from the area said 218 bodies had been counted, and many of the people were missing.
The flood followed heavy rains, which filled the coastal plain and dried river beds and caused them to overflow. The flood crest, sev
eral feet high, hit the village of Khemis Nagua at midmorning yesterday as farmers from the surrounding area joined town people in an o
pen market place.The roaring water swept the village’s living places, the market sheds (棚子), shoppers, cattle and farm tools for miles across the plain..
The flood was over almost as soon as it started, the reports said, as the cre
st swept out to sea. Rescue workers quickly moved into the area from Sari, about 25 miles further south.小题1: It can be learnt from the te
xt that _____.| A．the news report is from Khemis Nagua | B．the flo od didn’t last long |
| C．hundreds of Moroccans were saved | D．Casablanca is a city in Africa |
| A．how the flood swept the coastal plain | B．why the terrible flood took place |
| C．the flash flood in the fall | D．a rescue attempt |
(KN="Khemis" Nagua C="Casablanca " S=Safi)
A train that floats on air? It"s not magic―it"s magnets (磁).And it"s close to reality.
In Virginia USA the fall of 2002, a train with no wheels traveled on air and carried college students across their campus.In Japan, a whisper-quiet railway engine hovered and raced at 350 miles per hour using magnets and electricity as the power.And in China, a magnet train line linked Shanghai with nearby Pudong Airport.
These trains use magnetic levitation (悬浮) technology, “maglev” for short. They use the same rules as the magnets you pick up at home or school: opposite poles of magnets attract each other, and like poles repel each other.
How does it work?
Powerful magnets on the bottom of the train repel magnets on the track, which is actually just a magnet-filled guiding way. With a magnetic field of sufficient force, the train will go hovering on air, which seemed impossible to us in the past.
When an electrical current is sent through the track, the train moves. Turn the current backwards and the train slows down.
Maglev doesn"t rely on the friction (摩擦力) of wheels on track, so it can climb a much steeper hill than a traditional train. And it can travel easily in snow and ice, something that could bring normal trains to a screaming stop.
小题1:This passage is about __________.
| A．maglev | B．magnets | C．levitation | D．electricity |
| A． | B． | C． | D． |
| A．A magnet-filled guiding way is formed inside a maglev train. |
| B．Instead of electricity, magnets are used as the power of a maglev. |
| C．Maglev trains can climb hills with the help of magnetwheels. |
| D．Electric currents decide the movements of a maglev train. |
A．A maglev train can climb mountains without power while an ordinary o ne can’t. |
| B．A maglev train can travel in college campus while an ordinary train is not allowed. |
| C．Travelling without a track, a maglev train is safer and smoother than an ordinary one. |
| D．Floating on a track, a maglev train is faster, quieter than an ordinary railway train. |
Visiting the Embassies of Washington, D．C．Washington, D．C．is known for its many museums and government buildings．It is also home to embassies（大使馆）from more than 170 countries. Many of these buildings around the city have interesting histories. Some embassies are in large historical homes. Others were built more recently to show the building desihgn of their countries. Many embassies hold special cultural（文化）events.
The Embassy of Uzbekistan
It is in a richly decorated（装修）home built in 1906 by a wealthy banker, Clarence Moore. But Mr Moore did not live to enjoy his house for very long. He died on board the ship Titanic, which sank 1912·This building served as the Canadian Embassy before Uzbekistan bought it in 1996．
The Embassy of Finland
The Italian Embassy is near Massachusetts Avenue. Nearby, the Embassy of Finland looks like it is built out of blocks of glass．Its design is modern，but it fits in nicely with the natural environment around it．A screen of plants covers part of the front of the building．Inside．visitors Can look through large glass windows deep into the wooded areas of Rock Creek Park. The Finnish Embassy holds many interesting exhibits．
The Embassy of France
It is in a gated area off Reservoir Road．The embassy’s cultural center, La Maison Francaise, organizes many cultural events．Also．if you are very lucky, you might be invited to a party at the home of the French ambassador(大使)．This extraordinary home in the Kalorama neighborhood looks like a palace。Organizations like the Washington Opera sometimes hp1d events in this beautiful house。
The International Center
Last month，China opened a new embassy in the area of Washington called the International Center．C．C．Pei and L．C。Pei designed the building．Measuring more than 10．000 square meters，this is One of the biggest embassies in Washington．C．C．Pei said the areas of plants around the embassy
were to present people a natural and calming design．小题1:Which embassy was once a large historical home?
| A．The International Center． | B．The Embassy of Finland． |
| C．The Embassy of France． | D．The Embassy of Uzbekistan． |
| A．It once belonged to a rich banker． |
| B．It was built out of blocks of glass． |
| C．It stands in the Kalorama neighborhood． |
| D．It is a newly—constructed building． |
can .A．see many exhibits of great interest
B．attend events in La Maison Francaise
C．invi
te the French ambassador home D．visit its designers C．C．Pei and L．C．Pei
小题4:This text is most probably taken from
| A．a science magazine | B．a medical report |
| C．a travel guide | D．a history textbook |
ork. The Beidou, or Compass, system is being built to rival the US-developed GPS, the European Union"s Galileo and Russia"s Global Navigation Satellite System. It can allow travelers, drivers and military officials to kn
ow their locations. The fifth orbiter was launched on top of a Long March 3A carrier rocket at 5:30 am on Sunday from Xichang of Southwest China"s Sichuan province.
It is the third Compass satellite launched this year, following launches on Jan 17 and June 2.
The short interval of less than two months since the last launch demonstrated that "the country is stepping into a busy period of launching the Compass satellites", an unnamed official in charge of the project s
aid last month. The first two orbiters were launched in 2007 and 2009 respectively.
Sun Jiadong, the Beidou program"s chief designer, said on June 21 in a TV interview that China would launch 13 to 15 Beidou navigation satellites into orbit by 2012 to form a network that provides regional service covering the neighboring areas.
And in about 10 years, the network would be expanded to include more than 30 satellites covering the globe, he said.
The system is a crucial part of the country"s space infrastructure for providing nav
igation and positioning services in transportation, meteorology, pe
troleum prospecting, forest fire monitoring, disaster forecasting, telecommunications and public security. In addition, a global positioning system is crucial to any country"s national security and defense, said Ran Chengqi, an official in charge of the program, referring to the fact that the US initially built its GPS system for military purposes.
It is unimaginable for China to go without such a system, he said.
Earlier reports cited（引用） Song Xiaojun, a Beijing-based military expert, as saying that 90 percent of the world"s current weapons systems need a global positioning system.
小题1:This news report was probably released .
| A．in January, 2010 | B．in June, 2010 | C．in July, 2010 | D．in August, 2010 |
| A．China | B．China and its neigh boring areas |
| C．Asia, Europe and Oceania | D．the earth |
| A．military officers to judge their locations | B．travelers to know their locations |
| C．drivers to reach their destinations easily | D．hunters to find wild animals smoothly |
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