Falling objects are pulled down to the ground by . A．gravity B．resistance C．speed D．acceleration 2．Why do people make parachutes? A．To look pretty and colourful in the air. B．To slow down the f 题目和参考答案——青夏教育精英家教网—

题目内容

1．Falling objects are pulled down to the ground by .

A．gravity B．resistance C．speed D．acceleration（加速度）

2．Why do people make parachutes(降落伞)?

A．To look pretty and colourful in the air. B．To slow down the falling speed.

C．To push against the air in the sky. D．To accelerate the falling movement.

3．Which did Galileo discover?

A．A heavy ball falls faster than a light ball. B．A light ball falls faster than a heavy ball.

C．A light ball and a heavy ball fall at the same speed.

D．A light ball and a heavy ball fall at different speed.

4．Which of the following is NOT true according to the passage?

A．Heavy and light objects fall equally when they are different in size.

B．When air resistance equals gravity, objects fall at terminal speed.

C．Without air; all falling objects get faster and faster at the same rate.

D．Slippers（拖鞋） and boots （靴子）fall at the same speed because they have the same shape

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We should avoid ________ untrue claims about the products or services.

A．falling behind

B．falling for

C．to fall behind

D．to fall for

Cuts

Bleeding can usually be stopped by applying pressure to the cut for 2 or 3 minutes. The cut can then be carefully inspected. If it has bled freely any germs will normally have been washed away by the blood.

Apply a plaster dressing firmly, bringing the edges of the cut together so that it knits quickly. Keep dry for 1 to 2 days.

If the cut is deep and the edges cannot be pulled together with a dressing consult the doctor or the practice nurse. A tetanus (破伤风) injection may be needed.

Grazes

Dirt will often enter a graze caused by falling on a hard or rough surface. It must be cleaned out carefully with an antiseptic solution. (消毒液)

After cleaning, leave the graze uncovered. Exposure to the air will cause a scab to form. This will gradually fry and fall off.

It is not a good idea to apply a dressing. This may stick to the graze or make it complete wet and infected.

Bruises

Bruises are very common in children. They normally get better in 7 to 10 days Parents sometimes worry that a bone may be broken, but if in doubt consult the doctor. If a child gets up at once after a fall and moves about normally, it is unlikely that a bone has been broken.

Severe bruising can be treated by： Rest for 24 to 48 hours .In the case of a badly bruised leg, the limb should be raised. Lying in bed is the easiest way to do this.

A bad compress may ease a bad bruise if applied at once. This is made by leaving some material in water and applying it to the bruise.

Insect bites

These are common in the summer .They look like spots about 1/4’’across .They are very itchy (痒) and usually appear on exposed parts, e.g. arms and legs.

The itching can be relieved by calamine lotion (护肤药水).

Burns and scalds

Minor burns and scalds cause redness of the skin. Immediate treatment by pouring cold water over a burn is often helpful. If burns cause the skin severe hot or break the skin, the doctor should be turned to.

Sunburns should, if possible, be prevented by avoiding long exposure and covering exposed areas as much as needed. It may be treated by calamine lotion to relieve the pain.

1．The purpose of the booklet is _____

A．to tell us what to do until a doctor arrives.

B．to explain what cause minor illnesses.

C．to show that it is unnecessary to call a doctor.

D．to help us to treat minor illnesses at home

2．When treating a minor cut ,we are first told to _____.

A．clean out the wound. B． press down on the wound.

C．wash the blood away. D．close up the wound.

3．The injury which we are told how to avoid is _____.

A．sunburn. B．insect bites. C．scalds. D．cuts.

4．Patients with badly bruised legs are advised to go to bed so that ______.

A．they can rest completely. B．their injured leg can be lifted up.

C．they can leave their leg in water. D．a cold compress can be applied

After a busy day of work and play, the body needs to rest. Sleep is necessary for good health. During this time, the body recovers from the activities of the day. The rest that you get while sleeping makes it possible for your body to prepare itself for the next day.

There are four levels of sleep, each being a little deeper than the one before. As you sleep, your body relaxes little by little. Your heart beats more slowly, and your brain slows down. After you reach the fourth level, your body shifts(变换) back and forth from one level to the other.

Although your mind slows down, you will dream from time to time. Scientists who study sleep point out that when dreaming occurs, your eyeballs begin to move more quickly (although your eyelids are closed). This stage of sleep is called REM, which stands for rapid eye movement.

If you have trouble falling asleep, some people recommend(建议) breathing very slowly and very deeply. Other people believe that drinking warm milk will make you drowsy. There is also an old suggestion that counting sheep will put you to sleep.

49. During REM, ______

A. you move restless B. you start dreaming

C. your mind stops working D. your eyeballs move quickly

50. A good title for this text might be_________

A. Dreams B. Sleep C. Good Health D. Work and Rest

NASA’s twin Mars rovers, Spirit and Opportunity, have been exploring the Red Planet since 2004. But a little more than a year ago, NASA lost contact with Spirit. The space agency has tried several ways to make contact with the rover, but Spirit has not sent back any signals.

Spirit landed on Mars on January 4, 2004. Three weeks later, Opportunity arrived. Soon after, the rovers went to the opposite side of Mars. Spirit’s original mission was only designed to last for three months, but Spirit has worked for more than five years doing additional missions. Both rovers have made important discoveries about ancient Mars. They have taken thousands of images and found evidence in the rocks of a water, warmer past in Mars’ history.

Spirit is solar-powered. It got stuck in a sand trap in April 2009, trapped deep into the soil and with its wheels turning around and around but not able to move forwards or backwards. Spirit had to agree that there is nothing that can be done to change the situation—it’s never going to move again. However, even if it is a not moving station, it can still study the planet’s atmosphere and deep interior.

NASA has been concentrating on trying to position its solar panels to get as much energy from the sun as possible, or to get the rover leaning in a manner that will allow the most amount of sunlight falling on its solar panels, in order to keep it alive during the coming winter months. Engineers have planned to rock the vehicle back and forth to acquire a more favorable position. However, no matter how many efforts have been made, Spirit still could not get out of the soft soil and could not lean itself toward the sun as the Martian winter approached. Without enough energy reaching its solar panels and with so little energy in its batteries, it went into hibernation, just like a polar bear, and has not communicated with Earth since March 22, 2010.

Whatever the future holds for Spirit, its mission has been an outstanding success. When it landed on the Red Planet in January 2004, no one was really sure how long it would continue working in the cold and dusty environment. As a matter of fact, three months was its original goal.

After so many fruitless efforts, NASA scientists are losing hope of ever reconnecting with Spirit, but they will give it one more try. Ground controllers are contacting Spirit over a range of frequencies and at different times during the day in case its internal clock stopped working and it lost track of time. They also are commanding the rover to turn on its backup radio transmitter in case the main one is dead.

If this final effort to connect isn’t successful, NASA will shift the focus to its twin robot, Opportunity, which is in a different part of Mars. Opportunity is still on the move and continues to travel freely to this day. It has traveled 16.6 miles so far, and is currently rolling towards another crater it has yet to explore.

NASA has spent more than $900 million on the project but shows no sign of giving up on these determined and hard-working robots. The rovers are, though, experiencing gradual wear and tear, the expected damage to something caused by using it repeatedly over a period of time. Even before Spirit got trapped, one of its wheels had failed. And NASA says it’s just a matter of time before both robots break down completely.

1.According to the passage, what can we know about Spirit?

A. It had explored Mars several times.

B. Its original mission was to work for five years.

C. It landed on Mars three weeks later than Opportunity.

D. It discovered that Mars was once a warm and wetter place.

2.According to the passage, which of the following is NOT what NASA did?

A. Try to lean Spirit to make it get as much sunlight as possible.

B. Rock Spirit back and forth to make it acquire a more favorable position.

C. Make efforts to help Spirit get out of the soft soil where it is stuck.

D. Contact and order Spirit to turn on its backup radio transmitter.

3.The reason why Spirit failed to communicate with the Earth is that ________.

A. it didn’t have enough energy B. it had finished its task

C. something was wrong with its wheels D. it met an unidentified creature

4.By saying “NASA will shift the focus” in Paragraph 7, the author means that ______.

A. NASA will move the center of Spirit out of the sand

B. NASA will depend on Opportunity to do the exploration

C. NASA will do nothing but wait for some opportunity

D. NASA will make opportunity help Spirit

5.The last paragraph mainly informs us that _______.

A. NASA has planned to spend more money on Spirit

B. Spirit will be brought back to Earth

C. Spirit will stop operating totally in the future

D. Spirit will cause damage to Mars

6. What’s the text mainly about?

A. NASA makes the last effort to contact Spirit.

B. Spirit has made many important discoveries on Mars.

C. How Spirit got stuck and couldn’t move on Mars.

D. Why NASA tried many ways to contact Spirit.

People believes that climbing can do good to health. Where can you learn the skill of climbing then? If you think that you have to go to the mountains to learn how to climb, you’re wrong. Many Americans are learning to climb in city gyms(体育馆). Here, people are learning on climbing. The climbing wall goes straight up and small holding places for hands and feet.

How do people climb the wall? To climb, you need special shoes and harness(保护带) around your chest to hold you. There are ropes(绳索)tied to your harness. The ropes hold you in place so that you don’t fall. A beginner’s wall is usually about 15 feet high, and you climb straight up. There are small pieces of metal that stick out for you to stand on and hold on to. Sometimes it’s easy to see the new piece of metal. Sometimes, it’s not. The most difficult is your fear. It’s normal for humans to be afraid of falling, so it’s difficult not to feel fear. But when you move away from the wall, the harness and the ropes hold you, and you begin to feel safe. You move slowly until you reach the top.

Climbing attracts people because it’s good exercise for almost everyone. You use your whole body, especially your arms and legs. This sport gives your body a complete workout. When you climb, both your mind and your body can become stronger.

1.What can we infer from the passage?

A．People are fairly interested in climbing nowadays.

B．It is impossible to build up one’s body by climbing.

C．People can only learn the skill of climbing outdoors.

D．It is always easy to see holding places in climbing.

2.The most difficult thing to do in wall climbing is _______.

A．to tie ropes to your	B．to control your fear
C．to move away from the wall	D．to climb straight up

3.The word “workout” underlined in the last paragraph most probably means _________.

A．settlement

B．exercise

C．excitement

D．tiredness

4.Why does the author write this passage?

A．To tell people where to find gyms.	B．To prove the basic need for climbing
C．To encourage people to climb mountains.	D．introduce the sport of wall climbing

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