题目列表(包括答案和解析)
PALO ALTO, 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 graders, generally aged eight and nine, found that children who cut the number of hours spent watching television gained nearly two pounds(0.9kg) 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 video 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 continued their normal television viewing, even though neither group ate a special diet or 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 more 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 said.
【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.six hours | B.eight hours | C.three hours | D.one hour |
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. |
|
C
The curtain on the 2008 US presidential election finally rose last month as Requblican Senator(参议员) John McCain and Democratic Senator Barack Obama were formally selected as candidates of the two major parties.This may be one of the hardest decisions voters have to make between two appealing candidates.The big question for voters,as they face both an economic downturn and international threats,is :who will they elect? A young first - term senator promising change and new ideas,or a longtime senator with strong military experience and a reputation as a maverick(特立独行的人)?
American voters have never seen a candidate quite like Obama.He has a white mother from the US and a black fater from Kenya who left the family when Obama was very young.He spent part of his youth in Indonesia.
However,McCain has a very different life story.
He grew up in a Navy family and was a daring pilot during the Vietnam War in the 1960s. When Obama was in kindergarten in Indonesia,McCain's plane was shot down over Ietenam and he became a prisoner of war.McCain could have been set free if he disowned America but he refused and so was held for five years.
"We need a president who is very,very old,"McCain joked at his age as many others do.If elected,he would be 72 when he takes office and the oldest man to step in.
So in the end,the election may depend on several factors that are hard to judge:Will Obama's race matter to a significant number of voters ? Will workingclass whites who tended to support his primary (党内初选) oponent,Hillary Clinton,vote for Obama? And perhaps most important of all,will uncertain voters be more attracted to Obama's vision or to McCain's experience?
Whatever happens,one thing is clear,however:Whoever walks into the White House on January 20,2009,will find huge challenges waiting for him in the Oval Office,both at home and abroad.
64.______makes the result of the election hard to predict.
A.Whether working class whites care about Obama's inexperience
B.The economic trouble the country now faces
C.Who uncertain voters will finally decide to vote for
D.McCain being too old to govern the country
65.The appeal in Obama as a presidential candidate lies in _________
A.his multi - cultural background
B.his belife in tradition
C.his inexperience in politics
D.his fantastic promises
66.The word "disown" in Paragraph 6 means closest to ______.
A.flee from
B.turn his back on
C.not keep it private
D.expose secrets about
67.The challenges that will face the new preident______.
A.are not mentioned in the text
B.include buklding a strong party and a friendly image
C.refer to the problems of immigrants and economy
D.refer to the problems of economy amd international relations
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阅读下面短文,根据所读内容在表格中的空白处填入恰当的单词
注意:每个空格只填一个单词
Farmers might think the idea of growing food for fun sounds strange.But there are some people who do it all the time.
They grow some vegetables because their natural color or shape is pleasing to see.They grow others because scientists have developed new colors or different size for traditional vegetables.
One example is the bell pepper(胡椒).Seed companies sell seeds for several different kinds of bell peppers.One pepper is a weak yellow color when it begins to grow.Then its color changes to white.As it grows, it changes color two more times-to orange, then red.
Another unusual plant is known as the yard-long bean or snake bean.It grows up to one meter in length.It is an important part of the food supply in areas of Asia.
American farmers like it because it is different, yet tastes very much like the green beans they traditionally grow.Each bean has from ten to twenty seeds.The outside or pod can be eaten.Some of the very long beans are green outside but have black-and –white or red seed.
Gourds(葫芦)are plants that people like to grow because of the many different shapes.They also have many uses.Some round gourds are dried, painted and made into containers.Others have long necks and big bodies.These are dried, cut and made into pour drinking water.
Another kind of gourd is used to make sponges(海绵).When it is fully grown, it is removed from the vine and permitted to dry for a few weeks.Then it is placed in water for a few hours.The outer shell is then removed.The gourd is placed in the sun to dry.When it is fully dry, it is cut into pieces for use as sponges.They have a rough surface.They can be used to clean away dead skin cells, which makes them a popular skin-care product.
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