Ears are for hearing — everyone knows that. But for a creature called the Cuvie
题型：不详难度：来源：
The observation might help explain how all whales hear. The work might also help scientists understand how animals ar
e affected by underwater sonar (声呐). This sonar, used by some ships, sends out sound waves to locate underwater objects. The Cuvier’s beaked whale is a so-called toothed whale. Toothed whales dive deep into the ocean in search of food. As the whales hunt, they produce sounds that reach objects and then return to the whales. This allows the animals to “see” the shape, size, and location of objects, even when they’re 1,000 meters under the sea, where it is totally dark.
To better understand how the whale hears, researchers from San Diego State University in California took X rays of two Cuvier’s beaked whales. The whales had died and washed up on the beach.
Ted Cranford and his colleagues used the images to make a computer model of a Cuvier’s beaked whale’s head. Then, they modeled the process of sound traveling through the head.
The researchers knew that some sounds get to the ears of a toothed whale through a structure (构造) called “the window for sound”. Found on the lower jaw, this structure is very thin on the outside and has a large pad (垫) of fat on the inside.
When the researchers used their computer model to work out how sound waves travel in the whale’s head, they were surprised to find that sounds coming from right in front of the whale actually travel under the animal’s jaw. From there, sound waves move through the throat, into a hole in the back of the jaw, and finally to the pad of fat near the animal’s ears.
69. 小题1:Toothed whales look for food under the sea by ______.
| A．watching the shape and size of their objects | B．diving deep into the sea |
| C．sending and receiving sounds | D．making lots of noises |
| A．find out why they had died and washed up on the beach |
| B．make a computer model of a Cuvier’s beaked whale’s head |
| C．make sure that sound travels through the head |
| D．know more about the way the whale hears |
| A．A hole in the back of the jaw → the ears → the jaw → the throat. |
| B． The jaw → the throat → a hole in the back of the jaw → the ears. |
| C． The throat → the jaw → the ears → a hole in the back of the jaw. |
| D．The ears → the throat → a hole in the back of the jaw → the jaw. |
| A．The throat is important to the Cuvier’s beaked whale’s hearing. |
| B．Ships send out sound waves like a Cuvier’s beaked whale. |
| C．The ears are actually useless to the Cuvier’s beaked whale. |
| D．The researchers haven’t found how the whales hear. |
答案
小题1:C
小题2:D
小题3:B
小题4:A
解析
举一反三
The key to reaching or staying at a healthy weight is regular exercise and good eating habits. Teens should get 60 minutes or more of physical activity a day. Note the word “activity”. As long as you’re getting your body moving, it doesn’t have to mean doing complicated exercises or going to the gym (体育馆) every day. All that matters is that each week you get the right balance of activity, including aerobic (有氧健身法的) strength building, and flexibility (柔韧性) exercise. Make exercise a habit by scheduling some every day.On days when you have soccer practice or an aerobics class, you may have no trouble exercising for an hour or more. But most of us are busy, and 60 minutes a day of activity seems like a lot of time. The good news is that it’s OK to divide it into shorter “exercise breaks” throughout the day. Just as you might have a healthy snack to stop yourself getting hungry, exercise snacks can keep energy level high. So get up 15 minutes earlier and do some yoga or other stretching (伸展) activity. Fast walk or jog (慢跑) for 15 minutes at lunch. Do the same thing after school or walk or bike home. Add to that taking the stairs, gym class, and walking between classes during the day, and you’ve probably reached your 60 minutes.Here are 5 simple ways to make an exercise lifestyle change:1. Start today. Go outside for a walk.2. Take the stairs instead of the elevator.3. Instead of driving, walk or bike to places like school or a friend’s house.4. Clean your room or wash the car.5. Limit your time watching TV, using the computer, or playing video games--and when you do play, try some games that get you moving.小题1: The underlined phrase “exercise snacks” in the second paragraph probably means ________.| A．food eaten before exercise | B．food eaten during exercise | C．shorter “exercise breaks” | D．a new kind of exercise |
小题2:Why should we have exercise snacks every day?A．Because they can stop us getting hungry | B．Because they can keep energy level high | C．Because they can include many kinds of sports | D．Because they are more likely to relate to our daily life |
小题3:Which of the following is NOT mentioned in the passage?| A．To go hiking on your holidays | B．To spend less time on computer games | C．To go to school on foot or by bike | D．To do some housework at home |
小题4:What will be most probably discussed in the following paragraph?| A．Losing weight | B．Good eating habits | C．Exercising your brain | D．Outdoors exercise |
小题5: What would be the best title for this passage?| A．Regular exercise | B．School exercise | C．Indoors exercise | D．Difficult exercises |
India’s National Family Health Survey shows that more than twenty percent of Indians living in cities are overweight or obese. And in the northwestern state of Punjab, that is true for almost forty percent of women.
Aradhna Tripathi is a business professional in New Delhi. She said, “ Eating is the most important thing in any Indian household and how you show your love and gratitude(感激) for a person is through the kind of food you serve him. And the kind of lifestyle we are leading is one of the reasons why we have the number of obese people increasing every day.
But Aradhna Tripathi says she has decided to lose weight. Her mother and grandmother are also diabetic(患糖尿病的). In fact, the International Diabetes Federation says India is now the diabetes capital of the world. Researchers say Indians store more body fat per kilogram than Europeans. That means obese Indians are even more at the risk of diabetes than other people.
Doctor Anoop Misra at Fortis Hospital in New Delhi says the risk of diabetes is crossing social and economic lines. Five years ago, he says, obesity and diabetes were limited to India’s richest people, but now things have changed.
But Doctor Misra is hopeful that the spread (蔓延，传播)of obesity can be slowed. And he says it must start in schools by giving all Indian children the same instruction on physical activity and diet.
The World Health Organization says China is also moving up in obesity rates. The estimate (估计) has reached about five percent countryside and as high as twenty percent in some cities.
小题1:What is this passage mainly about?
| A．Obesity has become a big killer in India. |
| B．Heart disease is troubling people in India. |
| C．People in India live a very unhealthy life. |
| D．Malnutrition remains a serious problem in India. |
| A．.the development of economy |
| B．the change of Indians’ lifestyle |
| C．Indians’ attitude （态度）towards eating |
| D．Indians’ attitude towards obesity. |
| A．Most wealthy people in India are overweight. |
| B．Five years ago, few people in India were overweight |
| C．Few poor people are diabetic for economic reasons. |
| D．Now even the poor in India suffer from obesity. |
However, many experts in the field of health consider breakfast (the meal which “breaks” your “fast---- a period of time without eating anything ” which started the night before) to be the most important meal of the day. If we eat a good breakfast, they say, we will have the energy and nutrients we need to begin our working day with vigor and hopefully with good humour. But many people skip breakfast or replace it with snacks or a cup of coffee for a well-balanced meal. What happens if we ignore the importance of breakfast?
One recent study conducted in the United States tested a large number of people. Participants included both males and females who ranged in age from 12—83. During the experiment, these people were given a variety of breakfasts, and sometimes, they had to skip breakfast completely. Special tests, including blood tests and endurance tests, were set up to analyze how well the participants’ bodies functioned when they had eaten a certain kind of breakfast.
The result showed that if a person eats an adequate (充足的) breakfast, he or she will work more efficiently and more productively than if he or she skips breakfasts or eats a very poor breakfast. This fact appears to be especially true if a person’s work involves mental activity. The study showed that if schoolchildren eat fruit, eggs, bread and milk before going to school, they will learn more quickly and will be able to concentrate on their lessons for a longer period of time than if their breakfast diet is inadequate .
The study also showed that, contrary to what many people believe, if you skip breakfast, you will not lose weight. This is because people become so hungry if they skip breakfast that they eat too much for lunch and end up gaining weight instead of losing. So remember, if you are on a diet, skipping breakfast will not help you. You will probably lose more weight if you reduce your other meals.
小题1:According to the passage, we can safely say _____.
| A．if you skip breakfast, you will not lose weight at all |
| B．if you skip breakfast, you won’t eat much for lunch either. |
| C．skipping breakfast won’t do a bit of harm |
| D．skipping breakfast will help one lose weight |
| A．“moving quickly” | B．“going without food ” |
| C．“unlikely to go fast” | D．“fast food ” |
| A．they had skipped breakfasts | B．they had had breakfasts |
| C．they had eaten special breakfasts | D．they had had all three meals |
ABOUT LIPITOR
Lipitor(【医】立普妥<降血脂药> )is a prescription medicine．Along with diet and exercise，it lowers "bad，"cholesterol(胆固醇)in your blood．It can also raise "good"" cholesterol.
Lipitor can lower the risk of heart attack in patients with several common risk factors，including family history of early heart disease，high blood pressure，age and smoking.
WHO IS LIPITOR FOR?
Who can take LIPITOR：
·People who cannot lower their cholesterol enough with diet and exercise
·Adults and children over l0
Who should NOT take LIPITOR：
·Women who are pregnant，may be pregnant，or may become pregnant. Lipitor may harm your unborn baby.
·women who are breast-feeding．Lipitor can pass into your breast milk and may harm your baby.
·People with liver(肝脏)problems
POSSIBLE SIDE EFFECTS OF LIPITOR
Serious side effects in a small number of people：
·Muscle(肌肉)problems that can lead to kidney(肾脏)problems，including kidney failure
·Liver problems．Your doctor may do blood tests to check your liver before you start Lipitor and while you are taking it．
Call your doctor right away if you have：
·Unexplained muscle pain or weakness，especially if you have a fever or feel very fired
·Swelling of the face，lips，tongue，and／or throat that may cause difficulty in breathing or swallowing
·Stomach pain
Some common side effects of LIPITOR are：
·Muscle pain
·Upset stomach
·Changes in some blood tests
HOW TO TAKE LIPITOR
DO：
·Take Lipitor as prescribed by your doctor.
·Try to eat heart-healthy foods while you take Lipitor.
·Take Lipitor at any time of day, with or without food.
·If you miss a dose(一剂)，take it as soon as you remember. But if it has been more than12 hours since your missed dose，wait．Take the next dose at your regular time.
Don"t：
·Do not change or stop your dose before talking to your doctor.
·Do not start new medicines before talking to your doctor.
小题1:What is a major function of Lipitor?
| A．To help quit smoking. | B．To control blood pressure. |
| C．To improve unhealthy diet. | D．To lower "bad" cholesterol. |
| A．breast-feeding women | B．women who are pregnant |
| C．adults having heart disease | D．teenagers with liver problems． |
| A．change the amount of your next dose | B．eat more when taking your next dose |
| C．have a dose as soon as you remember | D．take the next dose at your regular time |
| A．Face swelling. | B．Upset stomach. | C．Kidney failure. | D．Muscle weakness. |
| A．To teach patients ways for quick recovery. |
| B．To present a report on a scientific research. |
| C．To show the importance of a good lifestyle. |
| D．To give information about a kind of medicine. |
●During the day, keep the bedroom window open to let fresh air in．
●Wash your face with cold water in the morning and wash your feet with hot water in the evening. This practice can help boost blood circulation and improve the body"s resistance.
●Do some exercises in the morning. such as jogging or shadowboxing（太极拳)for 10 minutes.
●Rinse(漱) your mouth with salt water or tea every morning and every evening. This can help kill flu bacteria, clear phlegm(痰）and keep the mouth fresh.
●Wear more clothes when it"s cold and take some off when it"s warm
●Get a bottle of vinegar or Chinese white wine at hand and smell it now and then. Their pungent smell can help people get refreshed and improve their body"s resistance.
● Drink two kinds of beverages（饮料）before going to bed, which can help people stay away from the flu: soup made of radish（萝卜）and vinegar, and tea made of fresh ginger（生姜）．
●Close the doors and windows and put a pot of boiling vinegar in the room Vinegar steam is a good way to kill flu bacteria in the air.
小题1: Some people like washing their face with cold water in the morning and washing their feet with hot water in the evening perhaps because______．
| A．they want to make themselves handsome or pretty |
| B．they know it is the best way to kill flu bacteria |
| C．they think it can strengthen blood circulation and improve their resistance |
| D．they have developed the good habit of living |
| A．take western medicine or traditional Chinese medicine |
| B．avoid getting it at the very beginning |
| C．use some homemade secret recipes |
| D．drink two kinds of beverages before going to bed in winter |
| A．Eight habits to keep the flu away | B．The cause of contracting the flu |
| C．Winter and flu | D．How to cure the flu |
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