If there is no difference in general intelligence(智力)between boys and girls,what can explain girls' poor performance in science and mathematics?
It seems to be that their treatment at school is a direct cause.Mathematics and science are seen as subjects mainly for boys,and therefore ,as girls become tee
nagers,they are less likely to take them.Interestingly,both boys and girls often
regard the subjects for boys as more difficult.Yet it has been suggested that girls do not take mathematics courses ,not because they are difficult,but for social reasons.Girls do not want to be in open competition with boys because they are afraid to appear less feminine(女性的)and attractive.
However,if we examine the performance of boys and girls who have taken mathematics courses,there are still more highachieving boys than there are girls.This difference appears to be worldwide.Biological explanations have been offered for this,but there are other explanations too.
Perhaps the difference which comes out during the teenage years has its roots in much earlier experiences.From their first days in kindergarten,boys are encouraged to work on their own and to complete tasks.Facts show that outstanding(杰出的)mathematicians and scientists have not had teachers who supplied answers.
Besides,there can be little doubt that teachers of mathematics and science expect their boy students to do better at these subjects than their girl students.They even appear to encourage the difference between boys and girls.They spend more time with the boy students ,giving them more time to answer questions and working harder to get correct answers from them.They are more likely to call on boys for answers and to allow them to take the lead in classroom discussion.They also praise boys more frequently.All of this seems to encourage boys to work harder in science and mathematics and to give them confidence(信心)that they are able to succeed.
Such a way of teaching is not likely to encourage girls to take many mathematics
and science courses,nor is it likely to support girls who do.When it comes to these subjects it seems certain that school widens the difference between boys and girls.
1.Girls are likely to think that____________.
A.science courses are for both boys and girls
B.science courses make them more popular
C.science courses make them successful
D.science courses are difficult for them
2.The text mainly discusses_____________reasons for the difference between boys and girls in scientific achievements.
A.biological B.historical C.social D.personal
3.What are boys usually encouraged to do at school?
A.To get help with their homework.
B.To play the leading role in class.
C.To work with girl students in class.
D.To learn to take care of others.
4.What does the passage say about great mathematicians?
A.Their teachers did not supply answers to them.
B.They started learning mathematics at an earlier age.
C.They showed mathematical abilities in their teenage years.
D.Their success resulted from their strong interest in mathematics.
5.The author would probably agree that_____________.
A.boys and girls learn in the same way
B.boys and girls are equal in general intelligence
C.girls are more confident in themselves than before
D.girls should take fewer science courses than boys
You have heard the expression “horse sense”. As you may imagine, it came from the time when the majority of people traveled in vehicles drawn by horses. A horse does have a lot of common sense, and there are many true stories about horses having saved their drivers from danger of death.
Today for the most part, people travel by train, ship, airplane, and car, but very little by the use of horses. Modern vehicles are propelled by engines, and an engine does not have any sense. In case of danger, many horses could be depended on to help. Not so with the engine; the driver must do all the things.
In recent years, the speed of travel has increased greatly. With the increased speed comes greatly increased danger. The driver of a powerful engine needs to be careful. A moment of being careless may cost a life. In order to drive today, a person must be able to see clearly, and he must learn and follow carefully the rules for safety on the road. Greater attention is the price we pay for using a machine instead of a horse.The passage mainly talks about ______.
| A．engines | B．safe driving |
| C．using horses | D．modern machines |
The underlined word “propel” in the second paragraph means ______.
| A．repair | B．raise | C．push forward | D．made |
It can be inferred from the passage that ______.
| A．a driver must know the rules of safety |
| B．a driver needs to be able only to tell red from green |
| C．an eye test is an important part of a driver’s examination |
| D．greater attention is needed for a driver while driving a machine |
Which of the following is NOT true?
| A．A driver must be able to see and hear well. |
| B．The driver of a car must follow the rules of safety. |
| C．Horses are known to have saved their drivers from injury. |
| D．It is better for vehicles to be pulled by horse than to be pushed by engine. |
People like different kinds of vacations. Some go camping. They swim, fish, cook over a fire and sleep outside. Others like to stay at a hotel in an exciting city. They go shopping all day and go dancing all night. Or maybe they go sightseeing to places such as Disneyland, the Tai Mahal or the Louvre.
Some people are bored with sightseeing trips. They don’t want to be “tourists”. They want to have an adventure— a surprising and exciting trip. They want to learn something and maybe help people too. How can they do this? Some travel companies and environmental groups are planning special adventures. Sometimes these trips are difficult and full of the world. Some volunteers spend two weeks and study the environment. Others work with animals. Others learn about people of the past.
Would you like an adventure in the Far North? A team of volunteers is leaving from Murmansk, Russia. The leader of this trip is a professor from Alaska. He’s worried about chemicals from factories. He and the volunteers will study this pollution in the environment. If you like exercise and cold weather, this is a good trip for you. Volunteers need ski sixteen kilometers every day. -
Do you enjoy ocean animals? You can spend two to four weeks in Hawaii. There, you can teach language to dolphins. Dolphins can follow orders such as “Bring me the large ball”. They also understand opposites. How much more can they understand? It will be exciting to learn about these intelligent animals. Another study trip goes to Washington State and follows orcas. We call orcas “Killer Whale”, but they’ re really dolphins—the largest kind of dolphin.. These beautiful animals travel together in family groups. They move through the ocean with their mothers, grandmothers and great-grandmothers. Ocean pollution is chasing their lives. Earthwatch is studying how this happens.
Are you interested in history? Then Greece is the place for your adventure. Thirty-five hundred years ago a volcano exploded there, on Santorini. This explosion was more terrible than Krakatoa or Mount Saint Helens. But today we know a lot about the way of life of the people from that time. There are houses, kitchens, and paintings as interesting as those in Pompei. Today teams of volunteers are learning more about people from the past.
Do you want a very different vacation? Do you want to travel far, work hard and learn a lot? Then an Earthwatch vacation is for you.
The Tai Mabal may be _________.
| A．a shopping center | B．a hotel |
| C．a dancing ball | D．a place of interest |
From the passage, on an adventure trip, people ______________.
| A．may not spend much time on sightseeing |
| B．won’ t meet some difficulties or hardships |
| C．can’t enjoy themselves - |
| D．can’t learn something |
If you want to learn something about people of the past, you can ___________
| A．join the team to Hawaii | B．join the team to the Far North |
| C．join the team to Washington | D．join the team to Greece |
The word “intelligent” in paragraph 4 means __________________.
| A．exciting | B．beautiful | C．large | D．clever |
Which of the following is false ?
| A．Some people find sightseeing trips boring. |
| B．Earth watch is planning all these special adventures |
| C．The number orcas is decreasing. |
| D．3 volcano explosions in all broke out 3, 500 years ago in Greece. |
What do you do if you're stranded (处于困境的) on a lonely island? Surely you need to find a way to get in touch with the outside world. Your best chance of doing this is to draw the attention of a passing plane.
Body signals (信号)
Pilots from different countries understand body signals if they have the correct training. When you wave your arms up and down in a straight line, it means "yes". When you point downwards and swing your arm from side to side, it means "no". If you want the pilot to know that it's safe to land, push your hands out in front of you and bend (弯曲) your knees. If you want to say that it's not safe to land, put your arms in the air and move them to one side.
Smoke signals
The smoke from a fire can be seen from far away, so it's a good way to draw attention. If the weather is dry, it isn't hard to start a fire. Remember, however, that fires can be very dangerous if they get out of control. Never light a fire unless you're sure that it can't spread. If the ground is dark, light smoke can be seen more easily. Green grass and leaves produce light smoke.
Ground-to-air signals
It's a good idea to build some signals, too. Use large pieces of wood to make the symbols (标记). If you can't find any wood, use earth. Some useful symbols are:
F: I need food and water."
II: I need medicine."
I: I am badly hurt."
X: I am unable to move from here."
Pilots' replies
If the pilot lowers the plane's wings from side to side, this means "message received and understood". (At night, the pilot flashes the plane's green lights.) If the pilots flies the plane in a clockwise circle, this means "message received but not understood". (At night, the pilot flashes the plane's red lights.)Which picture means "it's not safe to land"?
What can we learn from the passage?
| A．Swinging your arm from side to side means "yes". |
| B．If the ground is dark, light smoke can't be seen. |
| C．If you need some medicine, make a symbol "II". |
| D．The pilots make replies with a blue light at night. |
What is the passage mainly about?
| A．The explanation of building signals on an island. |
| B．The importance of making signals on an island. |
| C．Ways of sending out signals on a lonely island. |
| D．Ways of receiving signals from a lonely island. |
Dereck Joubert and his wife, Beverly, have made many films about wild animals in Africa. Their films and photographs are very popular and one of the photographs has been on the front cover of a National Geographic magazine.
A working day for Dereck and Beverly started very early—at 4:30 in the morning! That’s when they get up and start filming. And it’s a long day—they often work until 8:30 in the evening. In the winter it’s very cold and in the summer it can be 40C. Dereck always does the filming—Beverly never does that, and she doesn’t write. But Dereck never takes photographs or records the sound. They work very well as a team, and they both believe we should shoot animals with cameras—not with guns!
When they have finished filming and taking photographs for the day, they have dinner and Dereck usually writes while Beverly looks at her photographs. At night, they usually sleep in a small tent, but they sometimes sleep in the Land Cruiser—when they’re very close to wild animals, it’s sometimes safer to sleep in the car!
Dereck and Beverly have also traveled around the world and given talks about their work. Dereck says that the animals are not just something to look at—they play an important role. Beverly thinks the wild animals can teach us a lot about ourselves.Dereck and Beverly start working_________.
| A．at 4:30 in the morning |
| B．at 4:30 in the afternoon |
| C．at 8:30 in the morning |
| D．at 8:30 in the evening |
Dereck and Beverly usually sleep_________ at night.
| A．in a car | B．in a tent |
| C．in a house | D．in a hotel |
Beverly thinks the wild animals __________.
| A．are something to look at | B．are very popular |
| C．play an unimportant role | D．can teach us a lot |
Scientists believe that one of our most important means of knowing what is going on around us is the sense of sound. We are warned of danger by sounds. Sounds serve to please us in music. Sound has a waste product, too, in the form of noise. Noise has been called unwanted sound. Noise is growing and it may get much worse before it gets any better.
In order to know how noise affects people and animals, scientists have been studying for several years. They are surprised by what they have learned. Peace and quiet are becoming harder to find. Noise pollution is a threat that should be looked at carefully.
Sounds is measured in units called decibels (分贝). At a level of 140 decibels people feel pain in their ears.
Trucks , buses , motorcycles, airplanes, boats, factories---all these things make noise. They trouble not only our ears, but minds and bodies as well.
There is a saying that it is so noisy that you can’t hear yourself think. Doctors who study noise believe that we must sometimes hear ourselves think. If we don’t, we may have headaches, other aches and pains, or even worse mental problems.
Noise adds more tension (紧张) to a society that has already faced enough stress.The sense of sound _________.
| A．makes us feel excited |
| B．helps us hear more clearly |
| C．is something harmful to us |
| D．helps to know what is happening around us |
When sound is turned into noise, ______________.
| A．people grow worse and worse |
| B．it makes us forget all the past |
| C．people don’t know what to do with everyday life |
| D．it will be a kind of pollution to people |
Why does the passage say peace and quiet are becoming harder to find?
| A．Because the world is making more and more noise. |
| B．Because wars and battles happen here and there in the world. |
| C．Because all the sounds are becoming over 140 decibels. |
| D．Because some machines can make noise. |
Doctors say we can hear ourselves think __________.
| A．if we don’t like to hear noise |
| B．if we have no aches or pains in our bodies |
| C．if there isn’t too much noise |
| D．if we can’t be careful of noise |
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