What makes a person a scientist? Does he have ways or tools of learning that are different from those of others? The answer is “no”. It isn’t the tools a scientist uses but how he uses these tools which make him a scientist. You will probably agree that knowing how to use a power is important to a carpenter. You will probably agree, too, that knowing how to investigation, how to discover information, is important to everyone. The scientist, however, goes one step further; he must be sure that he has a reasonable answer to his questions and that his answer he gets to many questions is into a large set of ideas about how the world works.
The scientist’s knowledge must be exact. There’s no room for half right or right just half the time. He must be as nearly right as the conditions permit. What works under one set of conditions at one tim
e must work under the same conditions at other times. If the conditions are different, any changes the scientist observes in a demonstration(实证) must be explained by the changes in the conditions. This is one reason why investigations are important in science. Albert Einstein, who developed the Theory of Relativity, arrived at the theory through mathematics. The accuracy(正确性) of his mathematics was later tested through investigation. Einstein’s
ideas were proved to be correct. A scientist uses
many to
ols for measurements. Then the measurements are used to make mathematical calculations(计算) that may test his investigations What makes a scientist according to the passage?
| A．The tools he uses. | B．His ways of learning |
| C．The way he uses his tools | D．The various tools he uses |
“…knowing how to investigation, how to discover information, is important to everyone.”
The writer says this to show ___________.
| A．the importance of information |
| B．the difference between scientists and ordinary people. |
| C．the importance of thinking |
| D．the difference between carpenters and ordinary people |
A sound scientific theory should be one that _________.
| A．works under one set of conditions at one time and also works under the same conditions at other times |
| B．doesn’t allow any change even under different conditions |
| C．Can be used many times under different conditions |
| D．Can be used for many purposes |
What is the main idea of the passage?
| A．Scientists are different from ordinary people. |
| B．The Theory of Relativity. |
| C．Exactness is the core (核心) of science. |
| D．Exactness and way of using tools are the keys to making of a scientist. |
Beijing had its coldest morning in almost 40 years and its biggest snowfall since 1951. Britain is suffering through its longest cold snap (寒潮）since 1981. And freezing weather is hitting the US south.
Whatever happened to global warming?
Such weather doesn't seem to fit with warnings from scientists that the earth is warming because of greenhouse gases. But experts say the coldness doesn't deny global warming at all—it's just a blip in the long-term heating trend.
"It's part of natural variability(变化性），" said Gerald Meehl, a senior scientist at the National Centre for Atmospheric Research in Boulder, Colo. With global warming, he said，"We'll still have record cold temperatures. We'll just have fewer of them. ”
Scientists say man-made climate change does have the potential to cause more frequent and more severe weather extremes, such as heat waves, storms, floods, droughts and even coldness. But experts did not connect the current cold weather to climate change.
So what is going on?
"We basically have seen just a big outbreak of Arctic air over populated areas of the Northern Hemisphere，"Arndt said. In the atmosphere, large rivers of air travel roughly west to east around the globe between the Arctic and the tropics. But recently, this air flow has become bent into a pronounced (明显的）“z” pattern, moving from north and south. If you live in a place where it brings air up from the south, you will get warm weather. In fact, record highs were reported this week in Washington state and Alaska.
But in some other unlucky parts of the globe, Arctic air is moving down from the north. And that's how you get the low temperature in Beijing, and 18 inches of snow in parts of Britain, where a member of Parliament who said the snow "clearly indicates a cooling trend " was laughed at by colleagues.
The “z” pattern arises naturally from time to time, but it is not clear why it's so strong right now, said Michelle Heureux, a meteorologist at the Climate Prediction Center of the National Oceanic and Atmospheric Administration. The center says the pattern should begin to weaken in a week or two. Many areas are suffering low temperature except __________.
| A．Beijing |
| B．Washington state and Alaska |
| C．the US south |
| D．Britain |
The underlined word “blip” in Paragraph 3 means __________.
| A．temporary phenomenon |
| B．abnormal phenomenon |
| C．common phenomenon |
| D．rare phenomenon |
From the text, it can be learned that __________.
| A．global warming trend has proved wrong |
| B．there will be less coldness in the future |
| C．the “ z ” pattern Arctic air flow seldom happens |
| D．scientists haven't found out the reason of coldness |
The present coldness is probably caused by __________.
| A．climate change |
| B．Arctic air traveling west to east |
| C．the “z” pattern Arctic air flow |
| D．the cooling trend |
At first, the earth's surface layer (层）was made up of huge blocks of hard, solid rocks. Then slowly, the rocks broke up into smaller and smaller pieces. Finally stones, pebbles(砾石）and grains of sand were formed. Many sorts of plants and animals lived and died on the surface of the earth. Their remains mixed up with the stones, pebbles and formed soil. The outmost layer of the earth is soil.
There are many ways in which large pieces of rock break up into smaller ones. Wind, water, heat and cold help to break up rocks. When winds blow grains of sand against a large rock for a long time, the softer layers of the rock are slowly worn away. These leave holes and cracks (裂缝）in the rock, which become bigger and finally the rock breaks up into smaller pieces.
The moving water of streams and rivers also helps to break up rocks. As the water moves along, it carries with small pieces of rock. These rub the larger ones. Thus, the larger rocks are worn down to smaller pieces.
The heat of the sun is also helpful in breaking up rocks. When the sun shines, the rocks become very hot. If these rocks are suddenly cooled, they may crack. Ice also plays a part in making soil. Water in the cracks can turn into ice in cold weather. As this happens, it becomes bigger and the cracks become wider, and finally break up into smaller pieces. According to the passage, soil __________.
| A．forms very slowly |
| B．is a mixture only of stones, pebbles and sand |
| C．makes up the layers of the earth |
| D．is becoming smaller and smaller |
Which of the following speeds up the breaks of rocks most?
| A．Hot weather. |
| B．Cold water. |
| C．Sharp changes in temperature. |
| D．More dead plants in the cracks. |
Which of the following is NOT true?
| A．The remains of many plants and animals can form soil. |
| B．If a large rock never moves, it will never break up. |
| C．Even if a large rock never moves, it will break up. |
| D．Ice in the cracks helps to break up rocks. |
The best title for this passage should be __________
| A．Soil from rock |
| B．Ways to break up rocks |
| C．Soil on the earth |
| D．Soil, outmost layer of the earth |
Most people know that Marie Curie was the first woman to win the Nobel Prize, and the first person to win it twice. However, few people know that she was also the mother of a Nobel Prize winner.
Born in September，1897，Irene Curie was the first of the Curies' two daughters. Along with nine other children whose parents were also famous scholars, Irene studied in their own school, and her mother was one of the teachers. She finished her high school education at the College of Sevigne in Paris.
Irene entered the University of Paris in 1914 to prepare for a degree in mathematics and physics. When World War I began, Irene went to help her mother, who was using X-ray facilities (设备）to help save the lives of wounded soldiers. Irene continued the work by developing X-ray facilities in military hospitals in France and Belgium. Her services were recognized in the form of a Military's Medal by the French government.
In 1918，Irene became her mother's assistant at the Curie Institute. In December 1924，Frederic Joliot joined the Institute, and Irene taught him the techniques required for his work. They soon fell in love and were married in 1926. Their daughter Helene was born in 1927 and their son Pierre five years later.
Like her mother, Irene combined family and career. Like her mother, Irene was awarded a Nobel Prize, along with her husband, in 1935.
Unfortunately, also like her mother, she developed leukemia because of her work with radioactivity (辐射能）. Irene Joliot-Curie died from leukemia on March 17，1956. Why was Irene Curie awarded a Military's Medal?
| A．Because she received a degree in mathematics. |
| B．Because she contributed to saving the wounded. |
| C．Because she won the Nobel Prize with Frederic. |
| D．Because she worked as a helper to her mother. |
Where did Irene Curie meet her husband Frederic Joliot?
| A．At the Curie Institute. |
| B．At the University of Paris. |
| C．At a military hospital. |
| D．At the College of Sevigne. |
When was the second child of Irene Curie and Frederic Joliot born?
| A．In 1932. |
| B．In 1927. |
| C．In 1897. |
| D．In 1926. |
In which of the following aspects was Irene Curie different from her mother?
| A．Irene worked with radioactivity. |
| B．Irene combined family and career. |
| C．Irene won the Nobel Prize once. |
| D．Irene died from leukemia. |
In 1901，H. G. Wells, an English writer, wrote a book describing a trip to the moon. When the explorers (探险者)landed on the moon, they discovered that the moon was full of underground cities. They expressed their surprise to the "moon people" they met. In turn, the "moon people" expressed their surprise. "Why, "they asked, "are you traveling to outer space when you don't even use your inner space?"
H. G. Wells could only imagine travel to the moon. In 1969, human beings really did land on the moon. People today know that there are no underground cities on the moon. However, the question that the "moon people" asked is still an interesting one. A growing number of scientists are seriously thinking about it.
Underground systems are already in place. Many cities have underground car parks. In some cities, such as Tokyo, Seoul and Montreal, there are large underground shopping areas. The "Chunnel"， a tunnel (隊道)connecting England and France, is now complete.
But what about underground cities? Japan's Taisei Corporation is designed as a network of underground systems, called "Alice Cities". The designers imagine using surface space for public parks and using under-ground space for flats, offices, shopping, and so on. A solar dome (太阳能穹顶)would cover the whole city.
Supporters of underground development say that building down rather than building up is a good way to use the earth's space. The surface, they say, can be used for farms, parks, gardens, and wilderness. H. G. Wells, "moon people" would agree. Would you? The explorers in H. G. Wells' story were surprised to find that the "moon people" ________ .
| A．knew so much about the earth |
| B．understood their language |
| C．lived in so many underground cities |
| D．were ahead of them in space technology. |
What does the underlined word "it" (in Paragraph 2)refer to?
| A．Discovering the moon's inner space. |
| B．Using the earth's inner space. |
| C．Meeting the "moon people" again. |
| D．Traveling to outer space. |
What sort of underground systems are already here with us?
| A．Offices, shopping areas and power stations. |
| B．Tunnels car parks and shopping areas, |
| C．Gardens, car parks and power stations. |
| D．Tunnels, gardens and offices. |
What would be the best title for the text?
| A．Alice Cities-cities of the future. |
| B．Space travel with H. G. Wells |
| C．Enjoy living underground |
| D．Building down, not up |
Scientists in the United States say plant life has increased on Earth in the past twenty years and that in every area of plant growth the increase is the result of weather conditions.
Eight scientists from across the United States did the study. The space agency NASA and the Department of Energy paid for it. The findings were published in the magazine Science.
The researchers spent one and a half years examining weather satellite information. The information was recorded from 1982 to 1999. That period was one of the warmest on record. Researchers found that rainfall generally increased during that time.
The satellites measured the number of leaves on plants and the amount of sunlight taken in. The scientists used that information to estimate what is called net primary production. This is the total amount of carbon stored in land plants.
The scientists report a 6% increase in stored carbon since 1982. They say gains were high in equatorial areas, especially around the Amazon River in South America. The area alone had a 1 % increase in the net primary production.
The study was led by Ramakrishna Nemani of the University of Montana in Missoula. He says reduced cloud cover led to the growth in Amazon area. He also says the lack of clouds allowed more sunlight to get through. More sunlight meant increases in photosynthesis(光合作用）. That is the process by which plants use energy from sunlight to produce the chemicals they need to grow.
Northern Canada, the north-central United States and northern Europe were second in increased plant growth. Ramakrishna Nemani says a rise in temperature helped plants there.
All together, the report says 25% of areas of plant life on Earth experienced increases. But the scientists also note the increase in the number of people on Earth and carbon dioxide levels in the atmosphere. Ranga Myneni of Boston University in Massachusetts, another study scientist says humans use about half the net primary production on Earth. And he notes that the world population grew by 36% during the period of time studied. What's the main cause of the plant growth put forward by the study?
| A．Growth in population. |
| B．Regional features. |
| C．Seasonal variation. |
| D．Weather conditions. |
Which of the following is in charge of the study?
| A．The space agency NASA of the US. |
| B．The Department of Energy of the US. |
| C．Ramakrishna Nemani in Missoula. |
| D．Ranga Myneni in Massachusetts. |
Why do scientists believe that reduced cloud cover has led to the plant growth in the Amazon area?
| A．Because plants could take in more sunlight. |
| B．Because plants could get more rainfall. |
| C．Because plants could enjoy cooler air. |
| D．Because plants suffer less from natural disasters. |
Which of the following descriptions about the years from 1982 to 1999 is TRUE?
| A．It was the warmest on record. |
| B．Rainfall decreased little by little. |
| C．World population grew by 25%. |
| D．Stored carbon increased by 6%. |
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