大学英语四级考试15选10专项训练（九）

遇见明天

Unit Forty-One

Passage 2

Considered as acontinuous body of fluid, the atmosphere is another kind of ocean. Yet, in 11of the total amount of rain and snow on land areas in the course of a year, oneof the most 12 facts is the very small amount of water in the atmosphere at anygiven 13 . The volume of the lower seven miles of the atmosphere—the realm ofweather events—is 14 four times the volume of the world's oceans. But theatmosphere 15 very little water. It is chiefly in the form of 16 vapor, some ofwhich is carried over land by air currents. If all vapor 17 fell, it would forma layer only about one inch thick. A heavy rainstorm on a given area may use uponly a small percentage of the water from the air mass that passes over.

How, then, cansome land areas receive more than 400 inches of rain per year? How can severalinches of rain fall during a single storm in a few minutes or hours? The answeris that rain-yielding air masses are in 18 , and as the driving air mass moveson, new mist air takes its place.

The basic sourceof most water vapor is the ocean. Evaporation, vapor transport, and rainfallmake up the 19 movement of water from ocean to atmosphere to land and back tothe sea. Rivers return water to the sea. In an underground area of the cycle,flowing bodies of water 20 some water

directly into rivers and some directly to the sea.

A. contains B. view  C. discard  D. movement

E. time   F.  amazing G. continuous H. roughly

I.  amusing    J.  motion   K. rudely    L.  vision

M.  invisible   N. suddenly    O. discharge        

Unit Forty-Two

Passage 2

Nowadays, thestandard for measuring power has changed. These changes foretell a new standardfor measuring power. No longer will a nation's political influence be based 11on the strength of its military forces. Of course, military 12 will remain aprimary measure of power. But political influence is also closely 13 toindustrial competitiveness. It's often said that without its military the Soviet Union would really be a third-world 14 . The newstandard of power and influence that is evolving now places more emphasis onthe ability of a country to 15 effectively in the economic markets of theworld.

America must recognizethis new course of events. Our success in shaping world events over the past 40years has been the direct result of our ability to adapt 16 and to takeadvantage of the capabilities of our people for the pur pose of maintainingpeace. Our industry over most of this period was 17 .It is ironic that it isjust this industry that has enabled other countries to prosper and in turn tothreaten our industrial leadership.

The competitiveness of America'sindustrial base is an issue bigger than the Department of Defense and is goingto require the efforts of the major     18 forces in our society—government, industry, and education. That isnot to say that the Defense Department will not be a 19 force in theprocess.     

But we 20 cannotbe, nor should we be, looked upon by others as the savior of American industry.

A. effectiveness   B. tied    C. institutional     D. solely

E. nation     F.  exclusiveness     G. surely    H. complete

I. unchanged   J.  strong     K.compete    L.  simply

M.  unchallenged    N. technology    O. synthetical       

Unit Forty-Three

Passage 2

Data from thepioneer spacecraft of the National Aeronautics and Space Administration (NASA)11 prove the theory that the burning 900-degree Fahrenheit surface temperatureof Venus is 12 to an atmospheric greenhouse effect caused mainly by a blanketof carbon dioxide. Such a greenhouse effect is created when energy in the formof sunlight easily passes through a planet's atmosphere, warms its surface, andis 13 to heat radiation that is then held in by the atmosphere. The orbitingspacecraft 14 Venus' atmosphere from top to 15 , enabling NASA'S scientists toestablish the exact amount of sunlight absorbed at various places in theplanet's atmosphere and on its surface. Measurements of atmosphere composition,temperature profiles, and radiative heating predicted Venus' surfacetemperature very 16 . The planet is closer to the Sun than is Earth, and it hasa relatively thin atmosphere, but Venus' atmosphere consists of more thanninety percent carbon dioxide, 17 to less than four percent in that of Earth.Because of its 18 percentage of carbon dioxide, Venus' atmosphere traps muchmore heat radiation than does Earth's. Thus, the Venus studies are 19 to beimportant to the understanding of possible adverse effects on Earth'sagriculture and sea 20 that could result from the long-term use of fossilfuels, which add carbon dioxide to the atmosphere.

A.  levels   B. converted   C. accurately  D. simplified

E. owing F. conveyed    G. bottom   H. sampled

I.  due   J.higher     K. vainly     L.  compared

M. end   N. believed O. apparently       

Unit Forty-Five

Passage 2

Women in Britainare without doubt better off today than they 11 to be. At the beginning of thenineteenth century women seem to have had almost no rights at all. They couldnot vote, or even sign 12 . Their marriages were arranged by their parents, andonce they were married they could not 13 property. Most of the time they werenever given responsible jobs. It is 14 to think that, as far as we know, most womenwere happy with this situation.

Today the position is quite different. Women can now vote, and choosetheir own husbands. In 1970 alaw was 15 to give them an equal share of property in the case of divorce, andin the same year the Equal Pay Act gave them the right to equal pay with menfor work of equal value.

Yet despite these changes, there is no doubt that there are still greatdifferences in 16 between men and women. Many employers—maybe even themajority—seem to ignore the Equal Pay Act, and the average working woman islikely to earn only about half what a man earns for the same job. Most womenwho do work still do 17 jobs. Only a small proportion of the country's workersare in fact women. This small percentage is partly because of a-shortage ofnurseries. If there were 18 nurseries, up to twice as many women might well goout to work. There is also great 19   in education.

Only a quarter of all university students are women. And at present  boys' schools are 20 much better than girls' schools.

A. unselected  B. desired  C. undoubtedly    D. used

E. contracts    F.  passed  G. statue    H. strange

I. sufficient J.  inequality   K. own   L.  status

M. unsuspicious  N. concluded  O. unskilled   

游客，如果您要查看本帖隐藏内容请回复