题目内容

Why Exercise Is Cool?

1. Exercise Strengthens Muscles

Did you ever do a push-up or swing across the monkey bars at the playground? 1. By using your muscles to do powerful things, you can make them stronger. For older teens and adults, this kind of workout can make muscles bigger, too.

2. 2.

Can you touch your toes easily without yelling ouch? Most kids are pretty flexible, which means that they can bend and stretch their bodies without much trouble. Being flexible is having “full range of motion,” which means you can move your arms and legs freely without feeling tightness or pain.

3. Exercise Keeps the Balance

3. Your body needs a certain amount of calories every day just to function, breathe, walk around, and do all the basic stuff. 4. If you’re not very active, your body won’t need as many calories.

Whatever your calorie need is, if you eat enough to meet that need, your body weight will stay about the same. If you eat more calories than your body needs, it may be stored as extra fat.

4. Exercise Makes You Feel Good

It feels good to have a strong, flexible body that can do all the activities you enjoy—like running, jumping, and playing with your friends. It’s also fun to be good at something, like scoring a basket, hitting a home run, or perfecting a dive.

But you may not know that exercising can actually put you in a better mood.5. It’s just another reason why exercise is cool!

A. So you want to do some aerobic (有氧的) exercise right now?

B. Food gives your body fuel in the form of calories, which are a kind of energy.

C. When you exercise, your brain releases a chemical, which may make you feel happier.

D. Those are exercises that can build strength.

E. Exercise Makes You Flexible

F. Exercise Makes Your Heart Happy

G. But if you’re active, your body needs an extra measure of calories or energy.

 

1.D

2.E

3.B

4.G

5.C

【解析】

试题分析:本文叙述了为什么锻炼是酷的?一是锻炼能够锻炼肌肉。二是锻炼能使身体有柔韧性。三是锻炼能使身体保持平衡。四是锻炼能使人感觉心情好。短文从以上四个方面进行了阐述。

1.根据Did you ever do a push-up or swing across the monkey bars at the playground?By using your muscles to do powerful things, you can make them stronger. 根据上下文可知是这些锻炼可以增强体力。故选D。

2.根据Can you touch your toes easily without yelling ouch? Most kids are pretty flexible 锻炼能使身体灵活,故选E。

3.根据Your body needs a certain amount of calories every day just to function,食物能给人一定的热量,故选B。

4.根据If you’re not very active, your body won’t need as many calories. 可知,如果你是爱运动的,你的身体需要一个额外的热量或能量。故选G。

5.5】根据But you may not know that exercising can actually put you in a better mood.可知当你锻炼时,你的大脑会释放出一种化学物质,这可能会使你感到快乐,后面It’s just another reason why exercise is cool!这句话相呼应。故选C。

考点:健康生活类阅读

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A blind baby is doubly handicapped. Not only is it unable to see, but because it cannot receive the visual stimulus(刺激)from its environment that a sighted child does, it is likely to be slow in intellectual development. Now the ten-month old son of Dr. and Mrs. Dennis Daughters is the subject of an unusual psychological experiment designed to prevent a lag(滞后)in the learning process. With the aid of a sonar-type electronic that he wears on his head, infant(婴儿) Dennis is learning to identify the people and objects in the world around him by means of echoes(回声).

The device is an improvement of the “Sonicguide”, an instrument produced by Telesensory Systems,

Inc., of Palo Alto, Calif, and used by blind adults in addition to a smart or guide dog. As adapted for Dennis, it consists of a battery-powered system about the size of a half dollar that is on a headgear. A transmitter sends out an ultrasonic(超声的) pulse that creates an 80 degree cone of sound at 6 feet. Echoes from objects within the cone are perceived (felt) as sounds that vary in pitch(音调) and volume(音量) with the size and distance of the object.

The closer an object is, the lower the pitch, and the larger the object, the louder the signal. Hard surfaces produce a sharp ping, while soft ones send back signals with a slightly fuzzy quality. An object slightly to the right of Denny’s sends back a louder sound to his right ear than to the left. Thus , by simply moving his head right and left and up and down, he can not only locate an object but also get some notion of its shape and size, thanks to the varying qualities of sounds reaching his ears as the cone of ultrasound(超声波) passes its edges. Dennis likes to use the device to play a kind of peek-a-boo with his mother. Standing on her knee and facing her directly, he receives a strong signal in both ears. By turning his head away, he makes her seem to disappear. “From the first time he wore it,” says Mrs. Daughters, “it was like a light going on in his head.”

What remains to be determined is how well the device will help Dennis cope with his surroundings as he begins to walk and venture further into his environment.

Meanwhile, Telesensory, Inc, is working on the development of sonar(声纳) device with somewhat the same sensitivity as Dennis’s for use by school-age children.

1.Dr. and Mrs. Daughters’ research is directed to ________.

A. helping the blind to see and learn as well as others

B. benefiting the learning process of blind children

C. solving blind children’s psychological problems

D. finding out how children develop intellectually

2.Infant Dennis becomes the subject of the experiment most probably because ________.

A. he already lags behind the sighted children

B. he leads a life as normal as any other children

C. he is at the early stage of the learning process

D. he has the aid of a sonar-type electronic device

3.What can we learn about infant Dennis’ device?

A. Its first design was designed for blind adults.

B. Its battery is as small as a half-dollar coin.

C. It is functionally similar to a sane and guide dog.

D. It has been improved by Telesensory Systems, Inc.

4.In the third paragraph, “its edges” refers to ___________ .

A. the edge of an object

B. the edge of the device

C. the boundary of Dennis’ movement

D. the boundary of the sound pitch.

 

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