E
In the atmosphere.carbon dioxide.acts rather like a one-way mirror or the glass in the roof of a greenhouse which allows the sun’s rays to enter but prevents the heat from escaping.
According to a weather expert’s prediction,the atmosphere will be 3°C warmer in the year 2050 than it is today, if man continues to burn fuels at the present rate.If this warming up took place,the ice caps in the poles would begin to melt, thus raising sea level several meters and severely flooding coastal cities.
Also,the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere,possibly resulting in an alteration of the earth’s chief food growing zones.
In the past,concern about a man-made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet.But the weather experts are now paying more attention to West Antarctic,which may be affected by only a few degrees of warming,in other words,by a warming on the scale that will possibly take place in the next fifty years from the burning of fuels.
Satellite pictures show that large areas of Antarctic ice are already disappearing.The evidence available suggests that a warming has taken place.This fits the theory that carbon dioxide warms the earth.
However, most of the fuel is burnt in the northern hemisphere,where temperatures seem to be falling.Scientists conclude,therefore,that up to now natural influences on the weather have gone beyond those caused by man.The question is:Which natural cause has most effect on the weather?
One possibility is the variable behavior of the sun.Astronomers at one research station have studied the hot spots and ‘cold’ spots (that is,the relatively less hot spots)on the sun.As the sun rotates,every 27.5 days,it presents hotter or colder faces to the earth,and different aspects to different parts of the earth.This seems to have a considerable effect on the distribution of the earth’s atmospheric pressure,and consequently on wind circulation.The sun is also changeable over a long term:its heat output goes up and down in cycles,the latest trend being downward.
Scientists are now finding shared relation between models of solar weather interaction and the actual climate over many thousands of years,including the last Ice Age.The problem is that
the models are predicting that the world should be entering a new Ice Age and it is not.One way of solving this theoretical difficulty is to assume a delay of thousands of years while the solar effects overcome the inertia(惰性)of the earth’s climate.If this is right,the warming effect of carbon dioxide might thus be serving as a useful opposed balance to the sun’s fading heat.
72.It can be concluded that a concentration of carbon dioxide in the atmosphere would ______.
A.mean a warming-up in the Arctic
B.raise the temperature of the earth’s surface
C.prevent the sun’s rays from reaching the earth’s surface
D.explain the cause of great changes in the climate in the northern hemisphere
73.Although the fuel consumption is greater in the northern hemisphere, temperatures there
seem to be falling.This is _______.
A.mainly because the levels of carbon dioxide are rising
B.partly due to changes in the output of solar energy
C.possibly because the ice caps in the poles are melting
D.only due to the effect of the inertia of the earth’s climate
74.On the basis of their models , scientists are of the opinion that ________
A.the climate of the world should be becoming cooler
B.the new Ice Age will be delayed by the greenhouse effect
C.the man.made warming effect helps to increase the solar effects
D.it will take thousands of years for the inertia of the earth’s climate to take effect
75.If the assumption about the delay of a new Ice Age is correct , _________
A.ice would soon cover the northern hemisphere
B.the greenhouse effect could work in favor of the earth
C.the best way to overcome the cooling effect would be to bum more fuels
D.the increased levels of carbon dioxide could warm up the earth even more quickly
Jean Francis Grander was perhaps the most daring man who ever lived and perhaps the craziest.His greatest desire was to entertain and amaze people.He measured his success by the number of people who fainted dead away after witnessing his death-defying(极其惊险的)feats.
Grander,a blond Frenchman,toured North America in 1850,billing himself as “Blondin”.Blondin’s gift was excellent balance.This talent.coupled with a great desire to surprise and shock his audiences,made Blondin an incomparable performer.
His most famous feat was walking across Niagara Falls on a tightrope.Blondin’s “stage” consisted of a rope tied 1,100 feet across the falls.The rope hung some 160 feet above the rocks and boiling water below the falls.
Simply walking across the falls was not exciting enough for Blondin;he later had to ride across on a bicycle.Then,in another performance,he calmly walked across blindfolded(被蒙住的眼睛).At still another time,he carried his terrified manager on his back and walked over the falls before thousands of breathless audience.
But Blondin was undoubtedly his own worst critic.He was never satisfied with hfs act and always tried to attract his audience with his balancing feat.One of his most daring walks was made in the darkness of night.Blondin became so famous on his tour through North America that his last performance was attended by an admiring Prince of Wales.
60.Why does the author think that Grander may be the craziest man in the world?
A.Because he enjoyed entertaining people by terrifying them.
B.Because many people died after seeing his feats.
C.Because his greatest desire was to entertain people.
D.Because he was an incomparable performer.
61.What does the underlined word “feat” in this passage mean?
A.excellent performance B.tour
C.famous event D.victory
6 2.What can we infer from the first sentence in the last paragraph?
A.Blondin was very content with his own performance.
B.Blondin was not very very good at criticism.
C.Blondin never thought that his performance was satisfy.
D.Blondin didn’t like criticism.
63.The author’S attitude towards“Blondin”is.
A.critical B.admiring C.negative D.depressed
64.Which of the following can NOT be drawn from the passage?
A.Blondin’s success had something to do with his character.
B.In order to be Successful,one should be a critic of himself.
C.Blondin conquered his audience simply by his talent.
D.People can get pleasure from a terrifying experience.
第三部分:阅读理解(共20小题,每小题2分,满分40分)
During my elementary school years,I used to compare my mom with my best friend Tiffany’s mom.
Tiffany’s mom always gave her lots of money to buy the most fashionable clothes and favorite food.Her morn allowed her to do anything she liked.I really admired Tiffany.My mom didn’t give me much pocket money and she always told me that I should behave my self.1 was annoyed with her.
Whenever I didn’t get what 1 wanted,1 would complain to my mom,Tiffany’s mom would give her that!1 wish she were my mom.”Every time,my mom would calmly say “Poor Tiffany”.
I couldn’t understand her.“She shouldn’t be feeling sorry for Tiffany!”I thought.“She should be feeling sorry for me.”
One day,I couldn’t help saying to Morn,”Poor Tiffany?Lucky Tiffany! She gets everything she wants! Why do you feel sorry for her?”I burst into tears.
My mom sat down next to me and said softly , “Yes,I do feel sorry for her.I have been teaching you a lesson that she will never be taught.”
I looked up at her.“What are you talking about?”
Mom said with care,“One day she will really want something.Maybe she’11 find out that she can’t have it.Her mother won’t always be around to give her money,and what’s more,money can’t buy everything.”
She continued,“I have taught you valuable lessons by not giving you everything you want.You’11 know how to look for bargains and save money,but she won’t.You’11 under stand that you need to work hard to get the things that you want but she won’t.When Tiffany is a grown woman,she’11 wake up one day and she will be wishing that she had a mom like the one you’ve got.Life lessons are more important than modern clothes and delicious food.’’
It took some time,but I eventually understood my mom’s words.Now I am a happy and successful woman.
56.During the author’s elementary school years,she.
A.wished that her mom were as good as Tiffany’s
B.went to school with Tiffany every day
C.usually compared her lesson with Tiffany’s
D.sometimes gave lots of money to Tiffany
57.Why did the author’s mom always say “Poor Tiffany”?
A.She felt sorry for Tiffany because Tiffany was poor.
B.She wanted to tell a lie to comfort the author.
C.She thought that Tiffany was spoiled by her mother.
D.She told the author this and wanted her to help Tiffany.
58.What do we learn about the author’s mother?
A.She was strict and taught the author to be independent.
B.She cared for other people’s children more than her own.
C.She thought that life lessons were as important as money.
D.She was so poor that she couldn’t give the author much money.
59.What can we infer from the passage?
A.The author was quite annoyed with her mother in the past.
B.The author’s mother felt sorry for Tiffany.
C.Tiffany’s mother took the author’s mother’s advice.
D.The author is thankful to her mother now.
The person behind you constantly kicks the back of your seat.Your talkative seatmate doesn’t understand your need for sleep.And the aircraft’s bathroom is a total mess.These situations can make even a short flight unbearable.Hopefully you don’t cause these unpleasant experiences for others.Instead,you can set an example by following these common airplane courtesies.
Always recline your seat slowly.There’s nothing worse than suddenly being slammed in the knees by the seat in front of you.In addition,don’t keep your seat reclined for the entire flight.Always keep it upright position before going to the restroom(or anytime you leave your seat).
Avoid going to the bathroom during mealtime.Wait until the meal is done and all the food trays have been collected.It’s hard for passengers to stand up to let you pass when they still have their food trays.And when using the bathroom,always clean up after your-self-the next user will be grateful!
Keep your body--and your possessions-to yourself as much as possible so as not to crowd your in-flight seatmate(s).Share the armrest,especially on a long flight.Also,be careful not to kick or push on the seat in front of you,and don’t allow your children to do so either.
While some people enjoy chatting with other passengers during a flight,not everyone does.Some people may want to nap,read or work.If the conversation seems one—sided,take the hint.
If you are traveling with someone and want to chat,keep your voices low.If using electronic gadgets,keep the volume down.People can still hear through your headphones if the volume is too high.
When exiting the plane,if others are having trouble with their carry-on luggage,help them if you can.If you can’t help,wait patiently,and don’t push past people to get off the airplane.
On your next flight,remember that it all boils down to the golden rule.Treat others the way you want to be treated !
72.Which of the following manners we should follow while flying?
A.Always keep your seat upright during meal time.
B.Keep your belongings to yourself as much as possible.
C.Use your headphones and keep the volume down.
D.All the above.
73.Where do we most probably read this passage?
A.a text book B.a newspaper
C.a magazine D.a science book
74.Which of the following word has the closest meaning with the word courtesies?
A.golden rules B.manners C.experiences D.passengers
75.What is the best title of this passage?
A.Manners in the sky.
B.Bad manners in the sky.
C.Behave yourself in the sky.
D.Treat others the way you want to be treated.
Fish contains lost of omega-3 fatty acids.These fatty acids have been shown to help prevent heart disease,lower blood pressure and reduce the risk of strokes.Researchers suggest that these benefits of eating fish far outweigh the risks of getting sick from contaminated fish.
Ongoing studies find that omega-3 fatty acids work magic on the brain too.Pregnant? Go out and eat fish! One study tracked a group of expectant women who ate more than 340 grams of fish per week.It turns out they gave birth to children who,years later,scored really high on IQ tests.
How can you add fish to your diet? One way to begin is by replacing meat with fish in one meal a week.Instead of frying,which retains more fat,try boiling your fish in an oven or grilling it outdoors.And don’t be afraid to spice up your fish.Garlic,herbs other spices can add wonderful flavors to fish.
For lighter meals,keep a few cans of tuna or other fish on hand at all times.They’re great for making tasty sandwiches or fish burgers.If you get hungry in the middle of the morning or afternoon,try tuna on crackers.It’s hard to find a better snack.And parents,be sure to introduce fish to your children.It’s important for them to get used to eating it at a young age·
67.What does the writer discuss in this passage?
A.Chemicals in popular drinks B.The best way to lose weight
C.Famous fast food restaurants D.Reasons for having seafood
68.What does the writer point out about the women in the study group?
A.They cooked for their husbands. B.They were going to have babies.
C.They grew their own vegetables.D.They lived with elderly parents.
69.What does the author imply about omega-3 fatty acids?
A.They can make kids smarter.B.They are found in most foods.
C.They last for just a few days.D.They create significant risks.
70.Why is grilling better than frying?
A.It’s fancier.B.It’s quicker.C.It’s cheaper.D.It’s healthier.
71.According to the author,when is a good time to have tuna on crackers?
A.At lunchtime.B.During a party.
C.Between meals.D.After midnight.
No one likes germs.You wash your hands often and avoid sick people.But some of the germiest places are in your own home where you can’t avoid them!
Over 77,500 bacteria per square centimeter can live in your kitchen sink drain.More bacteria live in and around the sink itself.To get rid of them,clean the entire sink area with a disinfectant.
Those wet clothes from your washer are not all that clean,especially if they include underwear.Use hot water and bleach to wash underwear as it contains E.colin(大肠秆菌).Put wet laundry in the dryer quickly so the bacteria do not multiply.
The germs you wash off your body stay in the tub-about 15.500 bacteria per square centimeter! Use a disinfectant to clean your tub weekly.And dry the tub with a clean towel so more germs won’t grow on the wet surface.
You’ll find plenty of germs outside your home too.
Lots of germs live on the buttons of your local ATM.According to www.health.corn,Chinese researchers tested 38 ATMs in downtown Taipei.They found that each button hosted an average of 1,200 germs.Use a hand sanitizer after using the ATM and after handling paper money too.
The bottoms of women’s purses house tens of thousands if not millions of bacteria.University of Arizona researchers discovered all kinds of different bacteria on purse bottoms.These included E.coli as well as bacteria that cause eye and skin infections.Women should wipe their purses every few days with a mild soap solution.
All kinds of germs live on shopping cart shopping cart handles.Lots of people touch the handles each day——and who knows where their hands have been! Carry disinfectant wipes and use them on the handles.That will kill nearly a11 germs.
64.How many germy places are mentioned in this passage?
A.two B.four C.six D.eight
65.What does the underlined word disinfectant mean in the second paragraph?
A.a kind of germ
B.a tablecloth
C.a kind of cleaning tool
D.a kind of chemical liquid which can kill germs
66.Which of the following statement is NOT true according to the passage?
A.Some of the germiest places are outside your home.
B.Use a disinfectant to clean your bathtub weekly.
C.Use a hand sanitizer after using an ATM or handling paper money.
D.Thousands of not millions of bacteria live on the bottoms of women’s purses.