Spending two or three hours playing outdoors each day can reduce a child’s chance of becoming short-sighted, a research shows. It challenges (挑战) the belief that short-sightedness is caused by computer use, watching TV or reading in weak light.
The Australian government researchers believe that sunlight is good for people’s eyes. They compared the vision(视力) and habits of 100 seven-year-old children in Singapore and Australia. In all, 30% of the Singaporean children were short-sighted—this rate(比率) was ten times higher than Australian children.
Both groups spent a similar amount of time reading, watching television and playing computer games. However, the Australian children spent an average(平均) of two hours a day outdoors—90 minutes more than the Singaporean children.
Professor(教授) Ian Morgan, from the Australian Research Council’s Vision Centre, said, “Humans are naturally long-sighted, but when people begin to go to school and spend little or no time outdoors, the number of short-sighted people gets larger. We’re also seeing more and more short-sighted children in cities all around the world—and the main reason may be that city children spend less time outdoors.”
Daylight can be hundreds of times brighter than indoor light. But why does playing outside prevent us from becoming short-sighted? Scientists believe that natural light has a special chemical(化学物质) which stops the eyeball from growing out of shape and prevents people becoming short-sighted.
So be outdoors. It doesn’t matter if that time is spent having a picnic or playing sports.
1.How much time did the Singaporean children spend outdoors on average every day in the research?
A. 2 hours. B. 90 minutes.
C. 1 hour. D. 30 minutes.
2.What is the fifth paragraph mainly about?
A. Why people become short-sighted.
B. Why natural light has a special chemical.
C. Why playing outside is good for one’s eyesight.
D. Why daylight is much brighter than indoor light.
3.Which of the following is true according to the passage?
A. People will all become short-sighted after they begin to go to school.
B. Playing outdoors for 2 or 3 hours every day can help protect your eyesight.
C. Children in Australia are more likely to get short-sighted than those in Singapore.
D. If you spend two or three hours playing outside each day, you won’t get short-sighted.
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.)
However, there is no signal which means "message not received". Why not?
1.Which picture means "it's not safe land"?
2.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.
3.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
My summer hols wr CWOT. B4, we usd 2 go 2 NY 2C my bro, his CF & thr 3:-@ kids FTF ILNY, its gr8.
Can you understand this sentence? If you can't, don't feel too bad: neither could the middle school teacher in England who received this as homework. This is Netspeak: the language of computerized communication found on Internet or cellphones. To newcomers, it can look like a completely foreign language. So, what is the "translation" of the sentence above? My summer holidays were a complete waste of time. Before, we used to go to New York to see my brother, his girlfriend, and their three screaming kids face to face. I love New York; it's great.
Schoolteachers and parents say this new form of writing is harming（破坏）the English language. Increasing spelling and grammatical mistakes cxan be seen in students' writing. They fear the language could become corrupted（面目全非的）.
Everyone should just relax, say linguists（语言学家）. They believe Netspeak is in fact more of a good thing. David Crystal, from the University of Wales, argues that Netspeak and Internet create a new language use and the almost lost art of diary writing has been picked up again. Geoffrey Nunberg, from Stanford University, agrees. "People get better at writing by writing," he says, "Kids who are now doing text messaging, e-mail, and instant messages will write at least as well as, and possibly better than, their parents."
Linguist James Millroy says, for centuries, it is believed without exception that young people are harming the language. And you can bet your bottom dollar that when today's teenagers become tomorrow's parents, they too will think this way. Milroy argues that languages do not and cannot become "corrupted"; they simply change to meet the new needs.
However, Netspeakers do agree that it is important to teach young people how to speak and write Standard English. Cynthia McVey says, "I can understand Netspeak worries teachers and it's important that they get across to their pupils that text messaging is for fun, but that learning to write proper English is a must for their future."
Perhaps we should give teenagers a little more trust anyway. Erin, age 12, says, "I wouldn't use text language in my homework. Texting is just for fun"
1.What is the main purpose of the first paragraph?
A. To give an example of a foreign language.
B. To show an example of creative methods.
C. To express worries about using Netspeak.
D. To lead in the topic of Netspeak.
2.Which of the following is true according to the passage?
A. Cynthia McVey points out teenagers can deal with Netspeak properly.
B. Geoffrey Nunberg believes Netspeakers can write Standard English.
C. David Crystal thinks Netspeak helps develop the habit of writing.
D. James Milroy says that language is changing and improving.
3.The expression "bet your bottom dollar" in Paragraph 5 means ______.
A. be fairly sure B. be greatly surprised
C. think it a pity D. find it interesting
4.What can be the best title for the passage?
A. Netspeak: A Widely-Used Language on Internet
B. Is Netspeak Harming the English Language?
C. Is Netspeak Helpful in Language Learning?
D. Netspeak: Advantages and Disadvantages
We know the mosquito very well. Mosquitoes fly everywhere. They can be found almost all over the world， and there are more than 2，500 kinds of them.
No one likes the mosquito. But the mosquito may decide that she loves you. She？ Yes，she. It‘s true that male mosquito doesn’t bite（咬） and only the female mosquito bites because she needs blood to lay eggs. She is always looking for things or people she wants to bite. If she likes what she finds， she bites. But if she doesn‘t like your blood，she will turn to someone else for more delicious blood. Next time a mosquito bites you，just remember you are chosen. You’re different from the others！
If the mosquito likes you，she lands on your body without letting you know. She bites you so quickly and quietly that you may not feel anything different. After she bites，you will have an itch（痒） on your body because she puts something from her mouth together with your blood. By the time the itching begins，and she has flown away.
And then what happens？ Well，after her delicious dinner，the mosquito feels tired. She just wants to find a place to have a good rest. There，on a leaf or a wall， she begins to lay eggs，hundreds of eggs.
1.“Mosquito” means _______ in Chinese.
A. 苍蝇 B. 蜻蜓
C. 跳蚤 D. 蚊子
2.We know mosquitoes very well because ___________.
A. they can be found easily
B. they fly here and there
C. there are many kinds of them
D. they can fly
3.If the mosquito doesn‘t bite you， it will ________.
A. get angry with you B. be afraid of you
C. make a lot of noise D. choose another one
4.The mosquito bites you _________.
A. when you‘re asleep B. because you have choose it
C. too quickly to let you know D. but doesn‘t like you
5.Which of the following sentences is wrong？
A. The itching begins after the mosquito bites you.
B. You feel terrible when the mosquito bites you.
C. Mosquitoes use blood to lay eggs.
D. All the mosquitoes don‘t like to bite people for blood.
It is learnt from the experiences that kids get much more than just keeping fit when they play sports. Many people think that sports will waste time, and kids will not concentrate on their studies. 1. . Exercise improves memory, learning and concentration, which can give active kids an advantage in classrooms.
Children who play sports learn more about team work. They start learning the importance of working together. 2. , and how much one should struggle (努力) to reach that goal. Playing sports builds confidence and a positive attitude within kids.
3., and help them to be more social. This practice makes them mentally and physically strong, which keeps their mind healthy. Martial arts (武术) can teach kids patience. 4., and it makes them stronger mentally.
A. Children also learn from sports how to set a goal in life B. However, kids who play sports do better in school C. Swimming can make their shoulders very strong D. Children who play sports usually waste their time E. Besides, sports help kids to make new friends |
What do Napoleon, Clinton and Wang Nan have in common? They are all left-handed. Today about 15% of the number of people is left-handed. 1.? The answer is the way the brain works. The brain has two halves----the left half and the right half. The right half controls the left side of the body, and the left controls the right side of the body. 2. and left-handed people have a strong right brain.
The two halves of the brain are about the same size. 3.. The left side controls language, maths and logic. When you remember new words, or when put things in order, you use your left side. The right side of the brain controls your love of art, colour and music. It is also good at recognizing face.
4., and all accountants(会计师) are right-handed. Some right-handers have a strong right brain, and some left-handers have a strong left brain.
A. This does not mean that all artists are left-handed B. But why are people left-handed C. Are you left-handed or right-handed D. So right-handed people have a strong left brain E. But each side controls different things |
