题目内容
As skies are filled with millions of migrating(迁徙)birds, Eutopean scientists say the seasonal weadcr appears to be strange; the fatter that bird, the better it flies.
The results of their study led to a theory opposite to a eentral one of acrodynamies(空气动力学), whieh says that the power needed to fly inereases with weight.
For birds, obvionsly, the cost of flying with heavy fat is much smalleg than we used to think. Resenrchers found that red knoll wading birds double their normal body weight of 100 grams before making their twice-a-year nonstop flight between the Brilish lsles and the Russian Arctic. Distance; 5, 000 kilometers.
Another study in the magazine Naturn measured the ndvanrage of flying in an acrodynamic group which allows birds to save energy by flying smoothly and quielly in the lead bird’s air strearn.
Flying in groups, their heart rates were 14.5 pereenl lower than flying alone, according to Henri, a French scientist. The findings help explain how birds complets difficult migrations. Rescarehers had thought that thinner, stronger birds would have the best chance to survive.
The first study suggests that building up fat to be burnt as fuel during the migration is worth more than the energy it takes to carry the additional weight.
In the study, researeherd said their learn studied the birds flown at different body weights during 28 simulated(模拟的)flights. They foreed a small amount of special water into the birds’ bodies so that they could measure the amount of energy burnt during the flight.
1.A red knot wading bird of 100 grams will probably weigh_____before making its nonstop migraling flingt.
A.50 grams B.100 grams C.150 grams D.200 grams
2.During their migrating flight, red knot wading birds can save energy by flying_______.
A.separately B.alone C.in groups D.in pairs
3.A_______red not wading hird has a benet chance to survive during its migrating flight.
A.stronger B.weaker C.thinner D.fatter
4.The best title for this passage may probably be________.
A.Birds Thin Down For Journey
B.Birds Fatten Up For Journey
C.How Birds Build Up Fat For Journey
D.How Birds Burn Energy For Journey
1.D 2.C 3.D 4.B
Weather is the subject matter of Westerners whenever they met. Housewives, businessmen, factory workers as well as farmers all talk about the weather. It’s everyday news, whether or not conditions change. Many newspapers carry a regular front page news story in addition to the full reports on as inside-page provided by the weather service. Here are several different types of weather reports taken from the western papers:
No. 1 Regional Forecast
| New Jersey Today: Considerably cloudy with showers likely. High: 75-79. Southwesterly winds at 15-20m.p.h.. Precipitation(降水) probability 70 percent. Tonight: Warm and cloudy, rain likely. Low: 55-63. Southwesterly winds at 15 to 20m.p.h.. Tomorrow: Showers and thunderstorms likely. High: 75-79. Wind S to SW at 15 to 20m.p.h. |
No. 2 Three-day Forecast
| Westchester, Rockland Friday: Mostly fine to partly cloudy. Saturday: Cloudy with some showers. Sunday: Mostly fine. Temperature: Daytime highs will average in the upper 60’s to 70’s while overnight lows will average in the low to 50’s throughout the period. |
No. 3 Weather Stories
| Bitter cold, intensified(加剧) by high winds, gripped(控制) the Upper Midwest today, sheets of ice and snow left by the winter’s first major storm on highways throughout the area. At least six deaths were blamed on the storm. Hundreds of schools closed throughout the Upper Midwest yesterday and thousands of travelers waited out the weather at roadside shelters(避难处). Temperatures dropped well below zero early today from the Northern Plains through the Western Great Lakes under clearing skies. A 25-below-zero reading was forecast. Nearly a foot of snow fell on northern sections of Minnesota, Wisconsin and Michigan. And hardest hit were Duluth, Minn. and Superior, Wis., where 12 inches were recorded. Winds went up to 50 miles an hour. |
In a street corner of London, two strangers may begin their talk with “_____”.
A. Hi, how are you? B. What are you doing here? Waiting for someone?
C. A nice day, isn’t it? D. Didn’t you listen to the weather report last night?
The noon temperature of _____ is nearly 70’s at the weekend.
A. Western Great Lakes B. Duluth, Minn
C. Westchester, Rockland D. New Jersey
It seems that _____ has plenty of rain at the present season.
A. Western Great Lakes B. Wisconsin C. Westchester Rockland D. New Jersey
Which of the following is most probable according to No.3?
A. The traffic was terribly affected.
B. The Five Great Lakes were covered by heavy snow.
C. The temperatures might drop to 50℃.
D. Many schools were damaged in the snowstorm.
请阅读下列应用文及其相关信息，并按照要求匹配信息。
下面是几条与节日有关的报道，首先请阅读这些报道的标题和插图：
（注意：如果选择E，则在答题卡上同时填涂A和B选项；如果选择F，则在答题卡上同时填涂C和D选项。）
| A. |  | Father’s Day Shortchanged? Humble History, Fewer Gifts With Father’s Day 2011 here, find out how the holiday started, why Dad doesn’t mind being shortchanged on gifts, and more. |
| B. |  | Why Mother’s Day Horrified, Ruined Its Own Mother Born of war, Mother’s Day grew to horrify its own mother, whose fight to fix the holiday “cost her everything, financially and physically.” |
| C. |  | Valentine’s Day Facts: Gifts, History, and Love Science Where did Valentine’s Day come from? What does it cost? And why do we fall for it, year after year? |
| D. |  | Thanksgiving 2010 Myths and Facts Before the big dinner, debunk the myths—for starters, the first “real” Thanksgiving wasn’t until the 1800s—and get to the roots of Thanksgiving 2010. |
| E. |  | 4th of July Facts: 1st Fests, Number of Fireworks, More How did Founding Fathers Celebrate 4th of July? How many 4th of July fireworks explode each year? Answers and more. |
| F. |  | Earth Day at 40: What Good Is It Now? After 40 years, outsourced activism is replacing traditional Earth Day activities, and green’s gone mainstream, experts say. So what’s the point? |
【小题1】Where did this most popular day for couples come from? And how does it come into beings, year after year? Noel Lenski, professor of the University of Colorado, said the lovers’ holiday traces its roots to raucous annual Roman festivals held every year on February 15 and remained wildly popular well into the fifth century A.D.
【小题2】The first Earth Day in 1970 was a raucous, radical teach-in that helped spur clean-air, clean-water, and endangered species legislation in the United States. Now, 40 years later, Earth Day is every day, as the saying goes. The thing is, it’s also everyday- environmentalism that has become a routine with greenness as much a marketing tactic as a moral pursuit.
【小题3】Some 242 million turkeys were raised in the U.S. in 2010 for slaughter, according to the U.S. Department of Agriculture’s National Agricultural Statistics Service. Last year’s birds were worth about U.S. $3.6 billion. Before the big dinner, debunk the myths, we need to know that the first “real” U.S. Thanksgiving wasn’t until the 1800s and get to the roots of Thanksgiving 2010.
【小题4】Father’s Day traditionally takes a backseat to Mother’s Day, and, for the most part, dads are cool with that, experts say. Nevertheless, as traditional roles around the house gradually change, fathers are gaining more attention on their special day, at least as measured in the monetary value of gifts estimated to be given on June 19, 2011, when the holiday will be celebrated in dozens of countries.
【小题5】Cookouts, fireworks, and, of course, a chance to wish Uncle Sam a big “happy birthday” —the day means summer in full swing across the United States and beyond. Besides the founders of the US, Fireworks, first authorized by Congress in 1777, are another legacy. More than 14,000 fireworks displays light up U.S. skies each year.