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Scientists who try to predict earthquakes have gotten some new helpers recently—animals.
That’s right, animals. Scientists have begun to understand what farmers have known for thousands of years. Animals often seem to know in advance that an earthquake is coming, and they show their fear by acting in strange ways. Before a Chinese quake in 1975, snakes awoke from their winter sleep early only to freeze to death in the cold air. Cows broke their halters (缰绳) and tried to escape. Chickens refused to enter their cage. All of this unusual behavior, as well as physical changes in the earth, warned Chinese scientists of the coming quake. They moved people away from the danger zone and saved thousands of lives.
One task for scientists today is to learn exactly which types of animal behavior predict quakes. It’s not an easy job. First of all not every animal reacts to the danger of an earthquake. Just before a California quake in 1977, for example, an Arabian horse became very nervous and tried to break out of his enclosure. The Australian horse next to him, however, remained perfectly calm. It’s also difficult at times to tell the difference between normal animal restlessness and “earthquake nerves”. A zoo keeper once called earthquake researchers to say that his cougar had been acting strangely. It turned out that the cat had an upset stomach.
A second task for scientists is to find out exactly what kind of warnings the animals receive. They know that animals sense far more of the world than humans do. Many animals can see, hear, and smell things that people do not even notice. Some can sense tiny changes in air pressure, gravity, or the magnetism of Earth. This extra sense probably helps animals predict quakes.
A good example of this occurred with a group of dogs. They were shut in an area that was being shaken by a series of tiny earthquakes. (Several small quakes often come before or after a large one.) Before each quake a low booming sound was heard. Each boom caused the dogs to bark wildly. Then the dogs began to bark during a silent period. A scientist who was recording quakes looked at his machine. It was acting as though there were a loud noise too. The scientist realized that the dogs had reacted to a booming noise. They also sensed the tiny quake that followed it. The machine recorded both, though humans felt and heard nothing.
In this case there was a machine to monitor what the dogs were sensing. Many times, however, our machines record nothing extraordinary, even though animals know a quake is coming. The animals might be sensing something we measure but do not recognize as a warning. Discovering what animals sense, and learning how they know it is a danger signal, is a job for future scientists.
Through the passage the writer hopes to explore __________.
A. why animals send a danger signal before an earthquake
B. how animals know when an earthquake is coming
C. why animals not men have good sense of danger
D. how much animals know about an earthquake
During an earthquake in China in 1975, _________.
A. chickens refused to go out of their cage
B. snakes were frozen to death in their caves
C. snakes awoke from their winter sleep earlier
D. cows broke their halters and escaped from their sheds
Which of the following is one of earthquake nerves according to the passage?
A. An Arabian horse tried to escape from his enclosure.
B. A cougar had an upset stomach unexpectedly.
C. An Australian horse was perfectly calm.
D. A cat acted very strangely in a zoo.
The scientists did an experiment with a group of dogs to _________.
A. find out that the machine could record unusual happenings
B. compare the reactions of animals and those of humans
C. prove that animals could sense more than humans
D. find out what exact warnings animals sent
查看习题详情和答案>>Children are our future, and it’s up to us to arm them with the tools to succeed. Sadly, today’s children are being armed with more dangerous tools like weapons （武器）, drugs and gangs. Once a relatively peaceful environment, many schoolyards of today are becoming unsafe for both students and teachers.
Home schools are available to give you choices. Home schooling provides top-quality education, flexibility, and freedom to create your own schedule. At Heritage Home School we believe the choice should be yours. Thanks in part to modern technology, home schooling information is becoming readily available across our nation. A recent study by the ITBS （Iowa Tests of Basic Skills） and TAP （Tests of Achievement and Proficiency） shows us that students of home schools do particularly well when compared with the nationwide average. In every subject at every grade level, students of home schooling scored obviously higher than those in public and private schools.
If you’re new to home schooling, you may be asking yourself, “Will home schools really work for my children?”
Fact: A nationwide study using a random（任意）selection of 1,516 families found students of home schooling to be scoring, on average, at or above the 80th percentile in all areas on standardized achievement test.
Note: The national average on standardized achievement tests is the 50th percentile. Collectively, the staff at Heritage Home School brings 65 years of experience in home schooling curriculum. We’ve placed students in the top 2 % of the nation in math and many are successfully moving on to college.
One study found that of the home schooled adults, 0% were unemployed, 0% were on welfare and 94% said home education prepared them to be independent persons. For more home schooling information, call us today toll free at（877）532-7665.
We can learn from the first paragraph that ________.
A. many schools armed their students with weapons
B. violence and crime exist in many schoolyards
C. students use weapons to defend their schoolyards
D. weapons are more dangerous than drugs
All of the following are true of home schools EXCEPT that ________.
A. students are free to choose their courses
B. students do well in important national tests
C. they help students find jobs
D. they help students to be independent
What is the purpose of the text?
A. To give information about different schools.
B. To compare home schools with other schools.
C. To suggest a new method of school education.
D. To persuade people to choose home schools.
The advertisement is mainly aimed at ________.
A. students B. parents C. teachers D. adults
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请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。
注意：每个空格只填1个单词。
New research says 35 percent of child deaths worldwide are caused by hunger．The research comes from poor or middle-income countries in Africa, Asia and Latin America．
Robert Black from the' Bloomberg School of Public Health at Johns Hopkins University in Maryland, is the lead writer of the research．He says more than 3.5 million mothers and children under five die in poor countries each year because of hunger．
He says more than two million children die from underdevelopment, either before or after birth．Millions of, others who survive face a lifetime of disabilities or early death and the effects are not just physical．Poor mental development also results from hunger as children grow．Then the cycle of poverty and hunger often continues for their children．
Doctor Black says hungry children are also more likely to have conditions like high blood pressure and heart disease as adults．He says the studies show that food programs need to place the greatest importance on the first two years of life．Hungry children can suffer their whole life damage from age two．
It is high time their diets were improved．Diets should include foods rich in vitamin A and other useful vitamins and minerals．The researchers say early help such as this could reduce child deaths by 25％．
This research has also faced some criticism．A medical aid group says the researchers underestimate(低估)the number of child deaths due to hunger．The researchers say there are findings that support this treatment but more studies are needed to compare it to hospital care．
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Business is the organized approach to providing customers with the goods and services they want．The word business also refers to an organization that provides these goods and services．Most businesses seek to make a profit(利润)－ that is, they aim to achieve income that is more than the costs of operating the business． 1 Commonly called nonprofits, these organizations are primarily nongovernmental service providers． 2
Business management is a term used to describe the techniques of planning, direction, and control of the operations of a business． 3 One is the establishment(制定)of broad basic policies with respect to production; sales; the purchase of equipment, materials and supplies; and accounting． 4 The third relates to the establishment of standards of work in all departments．Direction is concerned primarily with supervision(监管)and guidance by the management in authority． 5 ．
A．Control includes the use of records and reports to compare actual work with the set standards for work．
B．In this connection there is the difference between top management and operative management．
C．Examples of nonprofit business include such organizations as social service agencies and may hospitals．
D．However, some businesses only seek to earn enough to cover their operating costs．
E．The second aspect relates to the application of these policies by departments．
F．In the theory of business management, organization has two main aspects．
G．Planning in business management has three main aspects．
Would you like to be a king or queen? To have people waiting on you hand and foot? Many Americans experience this royal treatment every day. How? By being customers. The American idea of customer service is to make each customer the center of attention. Need proof? Just listen to the commercials. Most of them sound like the McDonald’s ad: “We do it all for you.” Actually, not all stores in America roll out the red carpet for their customers. But wherever you go, good customer service means making customers feel special.
People going shopping in America can expect to be treated with respect from the very beginning. Most places don’t have a “furniture street” or a “computer road” which allow you to compare prices easily. Instead, people often “let their fingers do the walking” through the store hot lines. From the first “hello”, customers receive a satisfying response to their questions. This initial contact can help them decide where to shop.
When customers get to the store, they are treated as honored guests. Customers don’t usually find store clerks sitting around watching TV or playing cards. Instead, the clerks greet them warmly and offer to help them find what they want. In most stores, the clear signs that label each department make shopping a breeze. Customers usually don’t have to ask how much items cost, since prices are clearly marked. And unless they’re at a flea market or a yard sale, they don’t bother trying to bargain.
When customers are ready to check out, they find the nearest and shortest checkout lane. But as Murphy’s Law would have it, whichever lane they get in, all the other lanes will move faster. Good stores open new checkout lanes when the lanes get too long. Some even offer express lanes for customers with 10 items or less. After they pay for their purchases, customers receive a smile and a warm “thank you” from the clerk. Many stores even allow customers to take their shopping carts out to the parking lot. That way, they don’t have to carry heavy bags out to the car.
By quoting (引用) the McDonald’s ad: “We do it all for you”, the author intends to_______.
A. suggest that customers believe what commercials say deeply
B. show readers the American idea on good customer service
C. express all the stores pay much attention to the customers
D. persuade readers to choose the stores with ads correctly
In the USA, what may you do at first if you want to do some shopping?
A. To visit a professional street with lots of similar stores.
B. To compare prices in many shops in the same street.
C. To make phone calls and get better shopping choices.
D. To receive other customers’ answers to the questions.
The Underlined words “a breeze” in Para.3 most probably means _________.
A. an easy job B. a trouble C. a funny thing D. a boring task
Which of the followings shows American stores offer convenience to customers in this passage?
A. The store clerks don’t usually sit around watching TV or playing cards.
B. Some stores offer price bargain to the customers like a yard sale.
C. The clerks give customers a smile and a warm “thank you” after paying.
D. Some stores open new checkout lanes when the lanes are crowded.
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