The movement of dust across the Atlantic Ocean in recent years because of longer periods without rain in Africa． [ ] A．has been increased B．is increasing C．has been increasing D．increases 题目和参考答案——青夏教育精英家教网—

题目内容

The movement of dust across the Atlantic Ocean ________ in recent years because of longer periods without rain in Africa．

[　　]

A．has been increased

B．is increasing

C．has been increasing

D．increases

答案：C

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Everybody's voice is 4 . When a person's voice is recorded by an instrument, its voice frequency spectrum is called his sound print. Like a fingerprint, everybody's sound print is different. How can computers 5 his sound? First, his voice is recorded, which allows the computers to become familiar with his voice. It will then turn his sound characteristics into a 6 of digits. These digits represent the frequency, pitch and rhythm of the person’s voice. These are the 7 on which the computers can distinguish¹ his voice from 8 .

When that person needs to be identified, after he says only one word or two, the computers can identify him. The computers can even identify sounds coming 9 the wires. This will provide a 10 guarantee to electric banks and electric purchases.

We often bring ID cards², work cards, or driver licenses with us to prove our identity. If all these cards are forgotten or lost, how can we prove 11 we are? In fact, it's not difficult to prove whom you are, because your body 12 has identifying markers. Some are physiological features, such as fingerprints, sounds, facial types and eye color. The computer can help to identify you. Suppose your features have already been stored in the database³. To identify you, we have to take your picture with a camera and send it to a computer for 13 . First, the computer needs to reposition this picture according to the position of your eyes⁴, and then starts to read the message of your physiological features such as the 14 of your pupil⁵ to the whites of your eyes⁶ and the shape of his nose. Next, it seeks matching records from the database. Finally, it makes a 15 .

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The following conversation is between Susan Russell-Robinson from the US Geological （地质学的）Survey and Barbara Reynolds from USA Today .
Q: Why , after 600 years of no activity , did Mount Pinatubo in Philippines erupt（喷发）in 1991 ?
A: Volcanoes （火山）each have their own eruption styles . This volcano probably has a rule which makes it erupt in the order of every 500 to 1000 years , but a volcano in Hawaii seems to erupt every year , and some of the Alaskan volcanoes might erupt every 10 or 20 years .
Q: So nothing caused it ?
A: There’s nothing out of the ordinary . If you were to take an ordinary calendar year , 50 to 75 or 80 volcanoes erupt around the world every year . There are 20 to 30 volcanoes every month that show signs of unrest . That might be a full-blown eruption or a whole host of activities like that .
Q: What is “the ring of fire” ?
A: If you look at where active volcanoes are placed around the world , there are somewhere between 500 and 600 of them . There is what appears to be almost a necklace that goes around the Pacific Ocean . It makes a ring where 60% of the world’s volcanoes lie .
Q: Why such a concentration（集中）there ?
A: That’s based on a theory that the oceans and the continents are like separate pieces . When they move , one might ride up over the other one . In this case , the Pacific Ocean goes under the continents and when that happens it seems to produce magma （熔岩）at depth and then you have volcanoes in the same ring .
1．What kind of writing do you think this passage is ?
A．A text taken from a geography book . B．An interview published in the press .
C．A conversation carried out in a film . D．An oral test recorded as an example .
2．Which of the following statements can correctly explain why we have so many volcanoes around the Pacific Ocean ?
A．The movement of the surface of the earth makes it possible.
B．The Pacific Ocean produces magma and presses it everywhere.
C．The oceans and the continents are separated from each other.
D．The earth’s surface around the Pacific is thinner than any other part.
3．Barbara Reynolds’ main purpose here is______________ .
A．to show how dangerous volcanoes are to the world
B．to learn what signs a volcano gives us before its eruption
C．to warn the world of the existence of “the ring of fire”
D．to introduce some general idea of volcanoes to the public
4．Which of the following can be considered as the best conclusion of the conversation?
A．There are so many volcanoes in the world and we are always in danger.
B．Volcanoes have erupted more frequently than ever before.
C．Volcanoes are waiting to be better known.
D．Something must be done to protect the people near the ring of fire.

Individuality is the particular character, or aggregate (total) of qualities that distinguishes one person or thing from others. Many artists late in the last century were in search of a means to express their individuality. Modern dance was one of the ways some of these people sought to free their creative spirit. At the beginning there was no exacting technique, no foundation from which to build. In later years, trial, error and genius founded the techniques and the principles of the movement. Eventually, innovators (改革者) even drew from what they considered the dread ballet, but first they had to get rid of all that was academic so that the new could be discovered. The beginnings of modern dance were happening before Isadora Duncan, but she was the first person to bring the new dance to general audiences and see it accepted and acclaimed (称赞).
Her search for a natural movement form sent her to nature. She believed movement should be as natural as the swaying of the trees and the rolling waves of the sea, and should be in harmony with the movements of the Earth. Her great contributions are in three areas.
First, she began the expansion of the kinds of movement that could be used in dance. Before Duncan danced, ballet was the only type of dance performed in concert. In the ballet the feet and legs were emphasized, with virtuosity (高超技巧) shown by complex, codified positions and movements. Duncan performed dance by using her body in the freest possible way. Her dance stemmed from her soul and spirit. She was one of the pioneers who broke tradition so others might be able to develop the art.
Her second contribution lies in dance costume. She rejected ballet shoes and stiff costumes. These were replaced with flowing Grecian (希腊式的) tunes, bare feet, and unbound hair. She believed in the natural body being allowed to move freely, and her dress displayed this ideal.
Her third contribution was in the use of music. In her performances she used the symphonies of great masters including Beethoven and Wagner, which was not the usual custom.
She was as exciting and eccentric (怪异) in her personal life as in her dance.
【小题1】According to the passage, what did nature represent to Isadora Duncan?

A．Something to conquer.	B．A model for movement.
C．A place to find peace.	D．A symbol of disorder.

【小题2】Compared to those of the ballet, Isadora Duncan’s costumes were less _________.

【小题3】Which of the following is not mentioned as an area of dance that Duncan worked to change?

【小题4】We can infer from the passage that the author _________.

A．appreciates modern dance very much	B．dislikes Isadora Duncan’s dance
C．thinks highly of individuality	D．knows a lot about modern arts

【小题5】Which of the following would be the best title for the passage?

A．Artists of the Last Century	B．Evolution of Dance in the 20th Century
C．Natural Movement in Dance	D．A Pioneer in Modern Dance

The Kingdome in Seattle was destroyed on March 26, 2000. It was taken down to make room for a new stadium. The blast(爆破) from the falling building caused the earth to shake as if an earthquake had happened.
Scientists placed more than 200 earthquake recorders in the earth to measure the movement. They found which parts of the city shook the most. This information helped them know which parts of the city would be damaged in a real earthquake at an early time.
A real earthquake happened on February 28, 2001 in Seattle. The Nisqually earthquake was 6.8 on the Richter scale(里氏6.8级). It damaged the same parts of Seattle that scientists had predicted(预测) from the pulling down of the Kingdome. It was a plate quake. It started deep in the earth, 37 miles below the surface on the Juan de Fuca Plate. Sometimes, huge plates under the earth cause earthquakes when the plates move against each other suddenly.
Scientists have learned that deep earthquakes have very few aftershocks(余震). The Nisqually earthquake had only 4 ones. Another earthquake in California that was close to the surface had over 120 aftershocks. Scientists do not know why the deep earthquakes have fewer aftershocks.
Scientists plan to blast in the ground near Seattle with the purpose of testing the plate. The shockwaves from the blast will jump off the plate and give them an idea of where the plate is and how it is moving. This will give them more information in case another real earthquake hits the area.
72． According to the passage, ______ have the most aftershocks.
A．shockwave earthquakes B．shallow earthquakes
C．deep earthquakes D．earthquakes more than 6.8 Richter scale
73．What do scientists hope to learn from the blast above the Juan de Fuca Plate?
A．They hope to learn where the plate is and how it is moving.
B．They want to destroy the Kingdome.
C．They want to know which places are likely to have the most damage.
D．They hope to find out how many plates there are in the ground there.
74．Why were the scientists interested in the pulling down of the Seattle Kingdome?
A．They wanted to see which areas near the Kingdome would shake the hardest.
B．They wanted to predict what might happen in a real earthquake.
C．They wanted to measure the movement of the Earth with earthquake recorders.
D．All of the above.
75．What will happen after a deep earthquake according to the scientists?
A．There will be many aftershocks.
B．There will be very few aftershocks.
C．The Richter scale of the quakes will be a 6.8 or more.
D．There will be little damage.

Do you know mulch? Mulch is a protective cover of material that is spread on top of soil. It is usually made out of organic material, like crop waste. Farmers may keep the remains of corn or other crops on top of the soil. This creates mulch on the soil surface. The plant remains help protect the soil against wind and water damage. Mulching is one of the best things people can do for their plants. It also helps keep the soil from getting dry, and reduces the need for watering plants. It also limits temperature changes in the soil. And it stops unwanted plants, or weeds, from growing.

Organic mulch improves the condition of soil. As the mulch breaks down, it provides material which keeps the soil from getting hard. This improves the growth of roots and increases the movement of water through the soil. It also improves the ability of the soil to hold water. Organic mulch contains nutrients for plants. It also provides good environment for earthworms and other helpful living things in the soil.

It is easy to find organic mulch materials. Cut-up leaves and small pieces of tree bark can be used. Grass cuttings are also a good mulch for plants. Mulch from news- papers works well in controlling weeds.

The best time to add mulch depends on your goal. Mulch provides a thick barrier between the soil and the air. This helps to reduce temperature changes in the soil. As a result, mulched soil will be cooler than other soil in the summer. In winter, the mulched soil may not freeze as deeply as other soil. The best time is after the ground has frozen, but before the coldest weather arrives. Spreading mulch before the ground has frozen may attract small animals searching for a warm place to spend the winter. Delaying the spreading should prevent this problem. The animals will probably find another place to live.

1.The author tells us the following EXCEPT ______.

A. what mulch is and its advantages

B. the best time to add mulch

C. the bad effects of mulch

D. what can be mulch on the soil surface

2. The following can be used as organic materials to make mulch EXCEPT ______.

A. tree barks B. plastic C. grass cuttings D. cut-up leaves

3. The main idea of Paragraph 2 is that organic mulch can ______.

A. improve the condition of soil

B. improve the ability of the soil to hold water

C. provide a good environment for earthworms

D. improve the growth of roots and increase the movement of water through the soil

4. From the last paragraph, we know ______.

A. the best time to add mulch is in spring and summer

B. the best time to add mulch is after the coldest weather arrives

C. the best time to add mulch is exactly the same time of each year

D. choosing the best time to add mulch can avoid attracting small animals

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