How can you find out what is going on inside a person’s body without opening the patient’s body up? Regular X rays can show a lot. CAT scans can show even more. They can give a complete view of body organs.
What is a CAT scan? CAT stands for a kind of machine. It is a special X-ray machine that gets a 360-degree picture of a small area of a patient’s body.
Doctors use X rays to study and determine diseases and injuries within the body, X rays can find a foreign object inside the body or take pictures of some inside organs to be X-rayed.
A CAT scanner, however, uses a group of X rays to give a cross-sectional(横截面)view of a specific part of the body. A fine group of X rays is scanned across the body and around the patient from many different directions. A computer studies the information from each direction and produces a clear cross-sectional picture on a screen. This picture is then photographed for later use. Several cross sections, taken one after another, can give clear “photos” of the entire body or of any body organs. The latest CAT scanners can even give clear pictures of active, moving organs, just as a fast-action camera can “stop the action”, giving clear pictures of what appears unclear to the eye. And because of the 360-degree pictures, CAT scans show clear and complete views of organs in a manner that was once only shown during operation or examination of a dead patient.
Frequent appearance before X rays can cause skin burns, cancer or other damage to the body. Yet CAT scans actually don’t cause the patient to more radiation than regular X rays do. CAT scans can also be done without getting something harmful into the patient, so they are less risky than regular X rays.
CAT scans provide exact, detailed information. They can quickly find such a thing as bleeding inside the brain. They are helping to save lives.What is NOT true of a CAT scan?
A.It is safer than regular X rays. |
B.It makes use of computer techniques. |
C.It can stop the action of an organ for a short time. |
D.It gives clear pictures of active, moving body parts. |
The underlined words “a foreign object”(Para 3)most probably refer to .
A.a badly injured part inside the body |
B.a new thing that is unknown to the doctor |
C.a strange organ that has grown in the body |
D.an object that gets inside the body by chance |
What is the special use of the latest CAT scanners?
A.It provides clear photos of moving organs. |
B.It can take 3-dimension(三维)pictures of inside organs. |
C.It won’t cause serious skin burns, cancer or other damage to the body. |
D.It helps to find out what is going on inside a person’s body without opening it up. |
We can infer from this passage that .
A.patients in front of CAT may suffer from a bit of radiation |
B.doctors need no opening-up of the body with CAT scanners |
C.CAT scanners are more expensive than regular X-ray machines |
D.CAT scanners can take photos of either the whole body or a part of it |
The best title of this passage might be .
A.the Newest Medical Invention |
B.New X-ray Machine to Save Lives |
C.How to Avoid the Damage of X Rays |
D.Advantages and Disadvantages of CAT Scanners |
Not many years ago, a wealthy and rather strange old man named Johnson lived alone in a village in the south of England. He had made a lot of money in trading with foreign countries. When he was seventy – five, he gave $ 60,000 to the village school to buy land and equipment for a children’s ground.
As a result of his kindness, he became famous. Many people came to visit him. Among them was a newspaperman. During their talk, Johnson remarked that he was seventy-five and expected to live to be hundred. The newspaperman asked him how he managed to be healthy at seventy-five. Johnson had a sense of humor. He liked whisky and drank some each day. “I have an injection (注射) in my neck each evening,” he told the newspaperman, thinking of his evening glass of whisky.
The newspaperman did not understand what Johnson meant. In his newspaper he reported that Johnson was seventy-five and had daily injection in his neck. Within a week Johnson received thousands of letters from all over Britain, asking him for the secret of his daily injection.
Johnson became a rich man through _______.
A.doing business | B.making whisky |
C.cheating | D.buying and selling land |
Many people wrote to Johnson to find out _______.
A.what kind of whisky he had |
B.how to live longer |
C.how to become wealthy |
D.in which part of the neck to have an injection |
When Johnson said he had an injection in his neck each evening, he really meant that _______.
A.he liked drinking a glass of whisky in the evening |
B.he needn’t an injection in the neck |
C.a daily injection in the evening would make him sleep well |
D.there was something wrong with his neck |
Here are a few tips we’ve put together to help you learn English well.
Speak, speak, speak
Practise speaking as often as you can—even speaking to yourself is good practice.
Try recording yourself whenever you can. Compare your pronunciation with some famous persons’, see how you can do better and have another go. If you do this several times, you will find that each time is better than the last.
Why not learn with someone else?
It helps if you can learn with someone else. If you can persuade a friend or a family member to study with you, it will make you keep working.
Don’t get stuck by a word you don’t know.
Practise improvising(即兴的)ways of getting your meaning across when speaking spontaneously(本能地), even if you don’t know the exact words or phrases. Think of things you might want to say whenever you have spare time. Use facial expressions, hand movements, anything to get your meaning across.
Language learning is also about intuition(直觉).
Guesswork is an important way to learn a new language. When listening to recorded material, you aren’t expected to understand everything at once. If you play the same piece several times, you will most probably understand something new each time.
Build up your vocabulary.
A wide vocabulary is the key to successful language learning but don’t try to learn too much at once. It’s best to study often, for short periods of time. Take at most six or seven items of vocabulary and learn them. Put them into sentences to remember them in your mind, then come back to them later.
And above all, have fun!Why should one have himself recorded when practicing speaking?
A.To improve his speaking. |
B.To record his own progress. |
C.To encourage others to start. |
D.To become a famous person. |
It is implied(暗示) in the passage that _______ is helpful when you are learning English.
A.a good dictionary | B.a good school |
C.excellent pronunciation | D.body language |
According to the passage, one should ______ when you are learning English.
A.always work with other people |
B.be able to guess everything new |
C.often review what he has learnt |
D.take little notice of grammar |
In choosing a friend, one should be very careful. A good friend can help you study. You can have fun together and make each other happy. Sometimes you will meet“fair weather friends”. They will be with you if you have money or luck, but when you are down, they will run away. How do I know when I have found a good friend? I look for certain qualities (品质) of character, especially understanding, honesty and reliability (可靠).
Above all else, I look for understanding in a friend. A good friend tries to understand how another person is feeling. He is not quick to judge. Instead, he tries to learn from others. He puts himself in the other person's place, and he tries to think of ways to be helpful. He is also a good listener. At the same time, however, a good friend is honest. He does not look for faults (过错) in others. He notices their good points. In short, a friend will try to understand me and accept me.
Another quality of a friend is reliability. I can always depend on (信赖) a good friend. If he tells me he will meet me somewhere at a certain time, I can be sure that he will be there. If I need a favor, he will do his best to help me. If I am in trouble, he will not run away from me.
There is a fourth quality that makes a friend special. A special friend is someone with whom we can have fun. We should enjoy our lives, and we would enjoy our friendship. That is why I especially like friends who are fun to be with. A good friend likes the same things I like. We share experience and learn from each other. A good friend has a good sense of humor (幽默), too. He likes to laugh with me. That is how we share in the joy of being friends. And I know that he is looking for the same quality in me.
When I meet someone who is reliable, honest, and understanding, I know I've found a friend!Which of the following qualities the writer thinks is the most important in choosing a friend?
A.understanding. | B.honesty. |
C.reliability. | D.a sense of humor. |
If you have fair weather friends, ______ .
A.they will give you all that they have when you need help |
B.you will be refused when you get into trouble |
C.you will become rich |
D.you can be sure that you get real friends |
This passage mainly discuss ______ .
A.the qualities of a friend |
B.where to choose friends |
C.how to get along with friends |
D.the importance of having a friend |
Have you ever done something foolish that made you feel so embarrassed(尴尬的)?
Well, that’s exactly how I felt. On a Saturday morning last autumn.I had gone to town to do some shopping and as I was on my way home,it suddenly began to rain. I at once ran into a nearby phone box because I didn’t have an umbrella.It was raining so heavily that I have to stay in the phone box until it stopped.
A few moments later,I saw a young man walk up to the phone box,wearing a yellow raincoat and holding a box. I didn’t want to go out into the rain,so I picked up the phone and pretended(假装) I was talking to someone. I thought the man would go away,but he didn’t. He just waited in the rain,watching me. I had to wave my hands about and acted as if I was deep in conversation.
Luckily,it began to stop after about ten minutes.“Okay,Mum,” I said loudly into the phone,“I’ll see you later Bye!” I put the phone down, picked up my shopping bag and walked out of the phone box “I’m sorry I took so long,”I said to the man.
“Oh, I don’t want to use the phone,”he replied, smiling.“I’ve just come to repair it. It’s out of order.you see.” I felt myself go red in the face and I hurried away with my head down,feeling a complete fool. That was certainly one of the most embarrassing moments of my life!Why did the writer go to the phone box and stay there?
A.Because she wanted to keep warm. |
B.Because she wanted to wait for her friend there. |
C.Because she wanted to phone her mother. |
D.Because it rained heavily and she had no umbrella with her. |
What did the writer think the young man wanted to do?
A.To repair the phone. | B.To use the phone. |
C.To shake hands with her. | D.To listen to the phone box. |
How long did the young man wait for?
A.About five minutes. | B.About fifteen minutes. |
C.About ten minutes. | D.About thirty minutes. |
Which of the following is TRUE?
A.The story happened on a cold Saturday morning last summer. |
B.The writer was telephoning to her mother when the it rained. |
C.It suddenly rained when the writer was on her way home after shopping. |
D.The writer thought the rain would last long. |
The World Bank is warning that the West Africa Ebola outbreak could seriously harm the economies(经济) of Guinea, Liberia and Sierra Leone unless action is taken quickly. World Bank President Jim Yong Kim spoke to reporters recently to discuss the effects of the Ebola spread.
"Our findings show that if the virus(病毒) continues to spread, the economic cost to these countries could grow eight times by 2015. This would be a big catastrophe to their already weak economies," said Kim.
Mr. Kim says, "saving lives and preventing new spread" is most important. The bank has given $117-million for an "immediate help." The World Bank President says the SARS outbreak between 2002 and 2004 showed how a disease could damage economies. 800 people died from SARS and the economic losses were up to $40-billion.
Mr. Kim says SARS and the H1N1 outbreak of 2009 taught that fear and avoidance resulted in about 90-percent of the economic losses. That means the disease is causing two levels of economic damage.
"There are two kinds of contagion(传染). One is connected with the virus itself and the second is connected with the spread of fear about the virus," said Kim.
The World Bank thinks the losses to the economies of Liberia, Sierra Leone and Guinea will be big .Mr. Kim says losses could be about $97-million at the moment.
Mr. Kim says fast action is necessary. He says getting the disease under control is still far away. That is because there are not enough health care workers in the affected areas. The World Bank President says the most important measure is to act quickly in order to limit economic losses.What does the underlined word mean in the second paragraph?
A.effort | B.disaster |
C.warning | D.result |
If quick action is not taken to stop the spread of Ebola, the economic losses could reach about_______by 2015.
A.$800-million | B.$97-million |
C.$117-million | D.$40-billion. |
What’s the main idea of the whole passage?
A.Ebola is a serious and infectious(传染的)illness. |
B.Large numbers of people have died from Ebola. |
C.People in the West Africa are in great fear of the spread of Ebola virus. |
D.Ebola will harm economies in the West Africa seriously without quick action. |