题目列表(包括答案和解析)
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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。
Biofuels
Biofules have been around as long as cars have.At the start of the 20th century, Henry Ford planned to fuel his Model Ts with ethanol(乙醇).But discoveries of huge petroleum deposits(储量)kept gasoline and diesel(柴油)cheap for decades, and biofucls were largely forgotten.However, with the recent rise in oil prices, along with growing concern about global warming caused by carbon dioxide emissions, biofuels have been regaining popularity.
Gasoline and diesel are actually ancient biofuels.But they are known as fossil fuels because they are made from plants and animals that have been buried in the ground for millions of years.Biofuels are similar, except that they're made form plants grown today.
Much of the gasoline in the United States in blended with a biofuel-ethanol.Countries around the world are using various kinds of biofuels.For decades, Brazil has turned sugarcane into ethanol, and some cars there can run on pure ethanol rather than as additive to fossil fuels.
On the face of it, biofuels look line a great solution.Since plants absorb carbon dioxide as they grown crops grown for biofuels should suck up about as much carbon dioxide as comes out of the tailpipes of cars that burn these fuels.And unlike underground oil reserves, biofuels are a renewable resource since we can always grow more crops to turn into fuel.
Unfortunately, it's not so simple.The process of growing the crops, making fertilizers and pesticides, and processing the plants into me!consumes a lot of energy.Also, because much of the energy used in production comes from coal and natural gas, biofiiels don't replace as much oil as they use.
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MONEY – SAVING TIPS FOR DISNEY WORLD
Every time you visit Disney World, there’s something new to see. What began in 1971 as the Magic Kingdom now includes the high – tech, movie-mad Disney and Animal Kingdom . Each time the park expands(扩大), so do your chances to spend money. How can you save ? As a family guide to Disney World, I've been to the park more than 25 times with my kids , and I've developed a few money-saving tips for you.
●Buy the Five-Day All-in-One Hopper Pass. Even if you're visiting for fewer days , it's a deal (The pass costs $ 229 for visitors aged 10 and up , $ 183 for kids aged three to nine and is free for kids under age three). Without the pass , you'll have to pay separately for Pleasure Island and the water parks . A single trip to Blizzard Beach , for example , would cost a family of four $100.
● Dine out at Lunchtime. The prices at some of the nicer restaurants , especially those in Epcot's World Showcase , are much lower at noontime than at any other time. It's wise to make reservations(预定)before you leave home . Call 407-W-DISNEY .
● Become a Gold Card Member. For $ 65 , you can get a Magic Kingdom Club Gold Card (call 1-800-56-DISNEY). Cardholders get up to 20% off Disney hotel rooms , plus prices on character breakfast , theme park tickets and goods from Disney stores .
● Don't Pay Extra to See a Character. Character-theme dinner shows are expensive , costing a family of four about $ 140 , and even a character breakfast , where Mickey or Donald Duck joins you for cakes , can set you back $ 50. If your budget (预算) is tight, try to meet the characters inside the theme parks and at free in-park shows . You can watch the Diamond Horseshoe show , for example , in the Magic Kingdom for no additional cost , while the similarly themed Hoop-Dee-Doo Musical Revue needs expensive tickets .
● Wait Until the End of Your Trip to Buy Souvenirs. By then , the kids will really know what they want , and you won't waste money on expensive things .
67.If you are short of money, the writer suggests you should not .
A.buy things for the kids from Disney stores.
B.buy souvenirs at the beginning of the trip
C.make a trip to Blizzard Beach
D.have your meals out at noontime
68.Which of the following can be used in place of “set you back”
A.offer you B.save you C.return you D.cost you
69.You should pay more money if you .
A.have a five – day All – One Hopper Pass while you’re visiting for four days.
B.do not make a reservation for hotel rooms in advance..
C.are not a Magic Kingdom Club Gold Card holder.
D.have lunch at a restaurant in Epcot’s World Showcase
70.In the writer’s opinion, the better way of meeting the Disney cartoon character is .
A.to have a character breakfast
B.to watch the Diamond Horseshoe show
C.to pay separately for Pleasure Island and the water parks
D.to attend the Hoop – Dee – Doo Musical Revue
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She took up skating at age 85, made her first movie appearance at age 114, and held a concert in the neighborhood on her 121st birthday.
When it comes to long life, Jeanne Calment is the world’s recordholder. She lived to the ripe old age of 122. So is 122 the upper limit to the human life span(寿命)? If scientists come up with some sort of pill or diet that would slow aging, could we possibly make it to 150-or beyond?
Researchers don’t entirely agree on the answers. “Calment lived to 122, so it wouldn’t surprise me if someone alive today reaches 130 or 135, ”says Jerry Shay at the University of Texas.
Steve Austad at the University of Texas agrees. “People can live much longer than we think, ”he says. “Experts used to say that humans couldn’t live past 110. When Calment blew past that age, they raised the number to 120. So why can’t we go higher? ”
The trouble with guessing how old people can live to be is that it’s all just guessing. “Anyone can make up a number, ”says Rich Miller at the University of Michigan. “Usually the scientist who picks the highest number gets his name in Time magazine. ”
Won’t new anti-aging techniques keep us alive for centuries? Any cure, says Miller, for aging would probably keep most of us kicking until about 120. Researchers are working on treatments that lengthen the life span of mice by 50 percent at most. So, if the average human life span is about 80 years, says Miller, “adding another 50 percent would get you to 120. ”
So what can we conclude from this little disagreement among the researchers? That life span is flexible(有弹性的), but there is a limit, says George Martin of the University of Washington. “We can get flies to live 50 percent longer, ”he says. “But a fly’s never going to live 150 years. ”Of course, if you became a new species (物种), one that ages at a slower speed, that would be a different story, he adds.
Does Martin really believe that humans could evolve (进化)their way to longer life? “It’s pretty cool to think about, ”he says with a smile.
1. What does the story of Jeanne Calment prove to us?
A.People can live to 122.
B.Old people are creative.
C.Women are sporty at 85.
D.Women live longer than men.
2. According to Steve Austad at the University of Texas, ______.
A.the average human life span could be 110
B.scientists cannot find ways to slow aging
C.few people can expect to live to over 150
D.researchers are not sure how long people can live
3. Who would agree that a scientist will become famous if he makes the wildest guess at longevity?
A.Jerry Shay. B.Steve Austad
C.Rich Miller D.George Martin
4. What can we infer from the last three paragraphs?
A.Most of us could be good at sports even at 120.
B.The average human life span cannot be doubled
C.Scientists believe mice are aging at a slower speed than before.
D.New techniques could be used to change flies into a new species
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