题目列表(包括答案和解析)
阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词
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Farmers might think the idea of growing food for fun sounds strange．But there are some people who do it all the time．
They grow some vegetables because their natural color or shape is pleasing to see．They grow others because scientists have developed new colors or different size for traditional vegetables．
One example is the bell pepper(胡椒)．Seed companies sell seeds for several different kinds of bell peppers．One pepper is a weak yellow color when it begins to grow．Then its color changes to white．As it grows, it changes color two more times-to orange, then red．
Another unusual plant is known as the yard-long bean or snake bean．It grows up to one meter in length．It is an important part of the food supply in areas of Asia．
American farmers like it because it is different, yet tastes very much like the green beans they traditionally grow．Each bean has from ten to twenty seeds．The outside or pod can be eaten．Some of the very long beans are green outside but have black-and –white or red seed．
Gourds(葫芦)are plants that people like to grow because of the many different shapes．They also have many uses．Some round gourds are dried, painted and made into containers．Others have long necks and big bodies．These are dried, cut and made into pour drinking water．
Another kind of gourd is used to make sponges(海绵)．When it is fully grown, it is removed from the vine and permitted to dry for a few weeks．Then it is placed in water for a few hours．The outer shell is then removed．The gourd is placed in the sun to dry．When it is fully dry, it is cut into pieces for use as sponges．They have a rough surface．They can be used to clean away dead skin cells, which makes them a popular skin-care product．
In the atmosphere, carbon dioxide acts rather like a one-way mirror or the glass in the roof of a greenhouse which allows the sun's rays to enter but prevents the heat from escaping.
According to a weather expert' s prediction, the atmosphere will be 3℃ warmer in the year 2050 than it is today, if man continues to burn fuels at the present rate. If this warming up took place, the ice caps in the poles would begin to melt, thus raising sea level several metres and severely flooding coastal cities. Also, the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere (北半球), possibly resulting in an alteration of the earth's chief food growing zones.
In the past, concern about a man-made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet. But the weather experts are now paying more attention to West Antarctic, which may be affected by only a few degrees of warming, in other words, by a warming on the scale that will possibly take place in the next fifty years from the burning of fuels.
Satellite pictures show that large areas of Antarctic ice are already disappearing. The evidence available suggests that a warming has taken place. This fits the theory that carbon dioxide warms the earth.
However, most of the fuel is burnt in the northern hemisphere, where temperatures seem to be falling. Scientists conclude , therefore, that up to now natural influences on the weather have gone beyond those caused by man. The question is: Which natural cause has most effect on the weather?
One possibility is the variable behavior of the sun. Astronomers at one research station have studied the hot spots and "cold" spots (that is, the relatively less hot spots) on the sun. As the sun rotates (使旋转), every 27. 5 days, it presents hotter or "colder" faces to the earth, and different aspects to different parts of the earth. This seems to have a considerable effect on the distribution of the earth's atmospheric pressure, and consequently on wind circulation. The sun is also changeable over a long term: its heat output goes up and down in cycles, the latest trend being downward.
Scientists are now finding shared relations between models of solar weather interactions and the actual climate over many thousands of years, including the last Ice Age. The problem is that the models are predicting that the world should be entering a new Ice Age and it is not. One way of solving this theoretical difficulty is to assume a delay of thousands of years while the solar effects overcome the inertia (惯性) of the earth's climate. If this is right, the warming effect of carbon dioxide might thus be serving as a useful opposed balance to the sun's fading heat .
66. It can be concluded that a concentration of carbon dioxide in the atmosphere would_________.
A. mean a warming-up in the Antarctic
B. raise the temperature of the earth' s surface
C. prevent the sun's rays from reaching the earth's surface
D. explain the cause of great changes in the climate in the northern hemisphere
67.The article was written to explain ___________.
A. the greenhouse effect
B. the solar effects on the earth
C. the causes affecting weather
D. the models of solar-weather interactions
68. Although the fuel consumption is greater in the northern hemisphere, temperatures there seem to be falling. This is__________.
A. mainly because the levels of carbon dioxide are rising
B. partly due to changes in the output of solar energy
C. possibly because the ice caps in the poles are melting
D. only due to the effect of the inertia of the earth' s climate
69. On the basis of their models, scientists believe the opinion that__________.
A. the climate of the world should be becoming cooler
B. the new Ice Age will be delayed by the greenhouse effect
C. the man-made warming effect helps to increase the solar effects
D. it will take thousands of years for the inertia of the earth's climate to take effect
70. If the assumption about the delay of a new Ice age is correct, ____________.
A. ice would soon cover the northern hemisphere
B. the greenhouse effect could work in favor of the earth
C. the best way to overcome the cooling effect would be to burn more fuels
D. the increased levels of carbon dioxide in the atmosphere could warm up the earth even more quickly
Do you know insurance? Buying insurance(保险)is a 1 by which people can protect themselves against large losses. Protection against fire is one kind of insurance. Large numbers of people pay 2 sums of money 3 an insurance company. Although thousands of people have paid for fire insurance, only 4 will lose their homes by fire. The insurance company will pay for these homes 5 the sums of money it has collected.
The first modern fire insurance company was 6 in London, England, in 1666. A great fire had just 7 most of the city, and people wanted protection against 8 losses. The first company 9 rapidly. 10 other companies were founded in other areas.
Benjamin Franklin helped form the first fire insurance company in America in 1752.He also 11 a new kind of insurance for 12 The new insurance would offer protection against the loss of crops 13 storms.
In 1759, Benjamin Franklin helped start 14 new insurance company in America. This company, which offered 15 insurance, collected some money 16 from many different men. 17 a man died, his family was given a large sum of money. Today, this company is still in business.
Over the years, 18 have been benefited(受益)from many new kinds of insurance when they have suffered from 19 accidents as car and plane crashes. Today almost everyone has 20 kind of insurance.
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In the atmosphere,carbon dioxide actd rather like a one-way mirror or the glass in the roof of a greenhouse which allows the sun's rays to enter but prevents the heat from excaping.
According to a weather expert's prediction,the atmosphere will be 3 warmer in the year 2050 than it is today, if man continues to burn luels at the present rate. If this warming up took place,the ice caps in the poles would begin to melt,thus raising sea level several meters and severely flooding coastal cities.Also，the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere(半球),psooicbly resulting in an alteration of earth's chief food growing zones.
In the past,concern about a man - made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet.But the weather experts are now paying more attention to West Antarctic,which may be affected by a warming on the scale that will possibly take place in the next fifty years from on burning of fuels.
Satellite pictures showthat large areas of Antarctic ice are already disappearing.The evidence available suggests that a warming has taken place.This fits the theory that carbon dioxide warms the earth.
However,most of the fuel is burnt in the northern hemisphere,where temperatures seem to be falling.Scientists conclude,therefore,that up to now natural influences on the weather have exceeded those caused by man.The question is:Which natural cause has most effect on the weather?
One possibility is the variable behavior of the sun.Astronomers at one research station have studied the hot spots and cold spots(that is,the relatively less hot spots) on the sun. As the sun rotates(旋转),every 27.5 days,it presents hotter or colder faces to the earth,and different aspects to different parts of the earth.This seems to have a considerable effect on the distribution of the earth's atmospheric pressure,and consequently on wind circulation.The sun is also variable over a long term:its heat output goes up and down in cycles,the latest trend being downward.
Scientists are now finding mutual relations between models of solar weather interactions and the actual climate over many thousands of years ,including the last Ice Age.The problem is that the models are predicting that the world should be entering a new Ice Age and it is not.
One way of solving this theoretical difficulty is to assume a delay of thousands of years while the solar effects overcome the inertia(不活动，惰性) of the earth's climate.If this is right,the warming effect of carbon dioxide might thus be serving as a useful counter balance to the sun's diminishing heat.
68.It can be concluded that a concentration of carbon dioxide in the atmosphere would ___.
A.mean a warming - up im the Arctic
B.raise the temperature of the earth's surface
C.prevent the sun's rays from reaching the earth's surface
D.account for great changes in the climate in the northern hemiphere
69.Although the fuel consumption is greater in the northern hemisphere,temperatures there seem to be falling.This is _______.
A.mainly because the levels of carbon dioxide are rising
B.partly due to variations in the output of solar energy
C.possibly because the ice caps in the poles are melting
D.exclusively due to the effect of the inertia of the earth's climate
70.On the basis of their models,scientists are of the opinion that ________.
A.the climate of the world should be becoming cooler
B.the new Ice Age will be delayed by the greenhouse effect
C.the man - made warming effect helps to increase the solar effects
D.it will take thousands of years for the inertia of the earth's climate to take effect
Bicycle Safety
Operation Always ride your bike in a safe, controlled manner on campus. Obey rules and regulations. Watch out for walkers and other bicyclists, and always use your lights in dark conditions.
Theft Prevention Always securely lock your bicycle to a bicycle rack—even if you are only away for a minute. Register your bike with the University Department of Public Safety. It’s fast, easy, and free. Registration permanently records your serial number, which is useful in the possible recovery of the bike stolen.
Equipment
Brakes Make sure that they are in good working order and adjusted properly.
Helmet A necessity, make sure your helmet meets current safety standards and fits properly.
Lights Always have a front headlight—visible at least 500 feet in front of the bike. A taillight is a good idea.
Rules of the Road
Riding on Campus As a bicycle rider, you have a responsibility to ride only on streets and posted bicycle paths. Riding on sidewalks or other walkways can lead to a fine. The speed limit for bicycles on campus is 15 mph, unless otherwise posted. Always give the right of way to walkers. If you are involved in an accident, you are required to offer appropriate aid, call the Department of Public Safety and remain at the scene until the officer lets you go.
Bicycle Parking
Only park in areas reserved for bikes. Trees, handrails, hallways, and sign posts are not for bicycle parking, and parking in such spots can result in a fine.
If Things Go Wrong
If you break the rules, you will be fined. Besides violating rules while riding bicycles on campus, you could be fined for:
×No bicycle registration…$25 ×Bicycle parking banned…$30
×Blocking path with bicycle…$40 ×Violation of bicycle equipment requirement…$35
1.Registration of your bicycle may help you .
A. find your stolen bicycle B. get your serial number
C. receive free repair services D. settle conflicts with walkers
2.According to the passage, what bike equipment is a free choice for bicycle riders?
A. Brakes. B. A helmet. C. A headlight. D. A taillight.
3.If you lock your bicycle to a tree on the campus, you could be fined .
A.$25 B.$30 C.$35 D.$40
4. What is the passage mainly about?
A. A guide for safe bicycling on campus
B. Directions for bicycle tour on campus
C. Regulations of bicycle race on campus
D. Rules for riding motor vehicles on campus
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