Tornadoes, whirlwinds, and watersprouts are rotating funnel cloud air masses of small diam

Forces other than damaging winds are also at work inside tornadoes (龙卷风) . Sometimes,as the wind passes a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion is caused by the low air pressure at the center of a tornado.

The pressure at the center of a tornado is usually 13 pounds per square inch. However,inside the house the air pressure is normal, about 15 pounds per square inch.The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado passes over a small building that measures 20 by 10 by feet. On each square inch of the building, there is 2 pounds of pressure from the inside

that is not balanced by air pressure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57600 pounds. The pressure of the four walls adds up to 172800 pounds.

If windows are open in the building, some of the inside air will rush out through them.This will balance the pressure inside and outside the building.But if the windows are shut tightly, the huge inside pressure may cause the building to burst.

Unfortunately, heavy rain often occurs in the storms that later produce tornadoes,so people often shut their windows. This may cause far worse damage later.

21、 What did the paragraph before this passage most probably discuss？

A、 Measuring rainfall from a storm

B、 The kinds of damage caused by explosions

C、 The powerful winds of tornadoes

22、 Which of the following is the main topic of the passage？

A、 How tornadoes can be prevented

B、 When tornadoes usually occur

C、 Why tornadoes cause so much damage

23、 Tornadoes can destroy buildings because the()

A、 force of a tornado increases the air pressure in a building

B、 air pressure inside a tornado is less than the air pressure inside a building

C、 air pressure at the center of a tornado is over 172000 pounds

24、 What is the difference per square inch between the air pressure inside a building and the air pressure inside a tornado？

A、 2 pounds

B、 13 pounds

C、 15 pounds

25、 What would happen if the windows are shut tightly in the stormy weather？

A、 Tornadoes may be formed

B、 The house may be apart

C、 There may not be any pressure inside the building

A、固定价格合同

B、单价合同

C、成本加固定比例成本合同

D、成本加固定酬金合同

priority, 2、 quick-witted 3、 reference 4、 consequence 5、 anchor 6、text 7、counseling 8、whirlwind 9、die of 10、remind of 11、major in 12、Volunteer 13、 replicate 14、 flair 15、 phony 16、g roundbreaking 17、 show up 18、 compare to 19、hip 20、 knock off

你的公司Whirlwind Construction专长于制造过山车。最近，公司接到了一个RFP（方案征集书），要求制造世界上最刺激的过山车。设计如下：列车将60mph(100kph)的速度冲到300英尺的高度。旋转180度，倾斜往上600英尺，然而以100mph的速度俯冲，引力为地球重力的五倍。你知道以前从来没有制造过这样的过山车，该项目将是个高风险的项目。因此，你将为该项目签订何种合同： （）

A．固定价格合同

B．单价合同

C．成本加固定比例成本合同

D．成本加固定酬金合同

But that is precisely the trouble; for as far as I can see, Mozart's can. Mozart makes me begin to see ghosts, or at the very least ouija-boards. If you read Beethoven's letters, you feel that you are at the heart of a tempest, a whirlwind, a furnace; and so you should, because you are. If you read Wagner's, you feel that you have been run over by a tank, and that, too, is an appropriate response.

But if you read Mozart's—and he was a hugely prolific letter-writer—you have no clue at all to the power that drove him and the music it squeezed out of him in such profusion that death alone could stop it; they reveal nothing—nothing that explains it. Of course it is absurd(though the mistake is frequently made)to seek external causes for particular works of music; but with Mozart it is also absurd, or at any rate useless, to seek for internal ones either. Mozart was an instrument. But who was playing it？

That is what I mean by the Mozart Problem and the anxiety it causes me. In all art, in anything, there is nothing like the perfection of Mozart, nothing to compare with the range of feeling he explores, nothing to equal the contrast between the simplicity of the materials and the complexity and effect of his use of them. The piano concertos themselves exhibit these truths at their most intense; he was a greater master of this form. than of the symphony itself, and to hear every one of them, in the astounding abundance of genius they provide, played as I have so recently heard them played, is to be brought face to face with a mystery which, if we could solve it, would solve the mystery of life itself.

We can see Mozart, from infant prodigy to unmarked grave. We know what he did, what he wrote, what he felt, whom he loved, where he went, what he died of. We pile up such knowledge as a child does bricks; and then we hear the little tripping rondo tune of the last concerto—and the bricks collapse; all our knowledge is useless to explain a single bar of it. It is almost enough to make me believe in — but I have run out of space, and don't have to say it. Put K. 595 on the gramophone and say it for me.

According to Paragraph 1, Cardus observed that ______ .

A．a composer can separate his language and harmonies from his own mind and sensibility

B．a composer can separate his language and harmonies from the mind and sensibility of an artist

C．some people can separate the language and harmonies of a composer from his mind and sensibility

D．the language, harmonies, rhythms, melodies, colors and texture of a composer cannot be separated from each other

Conventional computer models of the atmosphere have limited value in predicting short lived local storms like the Edmonton tornado, because the available weather data are generally not detailed enough to allow computers to study carefully the subtle atmospheric changes that come before these storms.In most nations, for example, weather – balloon observations are taken just once every twelve hours at locations typically separated by hundreds of miles.With such limited data, conventional forecasting models do a much better job predicting general weather conditions over large regions than they do forecasting specific local events.

Until recently, the observation intensive approach needed for accurate, very short – range forecasts, or “Nowcasts,” was not feasible.The cost of equipping and operating many thousands of conventional weather stations was extremely high, and the difficulties involved in rapidly collecting and processing the raw weather data from such a network were hard to overcome.Fortunately, scientific and technological advances have overcome most of these problems.Radar systems, automated weather instruments, and satellites are all capable of making detailed, nearly continuous observation over large regions at a relatively low cost.Communications satellites can transmit data around the world cheaply and instantaneously, and modern computers can quickly compile and analyze this large volume of weather information.Meteorologists and computer scientists now work together to design computer programs and video equipment capable of transforming raw weather data into words, symbols, and vivid graphic displays that forecasters can interpret easily and quickly.As meteorologists have begun using these new technologies in weather forecasting offices, Nowcasting is becoming a reality.

11.The word “exceeded” in paragraph I most probably means ____________.

A.added up toB.were more than

C.were about D.were less than

12.Conventional computer models of the atmosphere fails to predict such a short – lived tornado because ______________.

A.the computer is not used to forecast specific local events

B.the computers are not advanced enough to predict it

C.the weather data people collect are often wrong

D.weather conditions in some small regions are not available

13.According to the passage, the word “Nowcast” (paragraph 3) means _______________.

A.a way of collecting raw weather data

B.a forecast which can predict the weather conditions in the small area in an accurate way

C.a network to collect instant weather data

D.a more advanced system of weather observation

14.According to the passage, ___________ is the key factor to making “Nowcasts” a reality.

A.scientific and technological advances such as radar, or satellites

B.computer scientist

C.meteorologists

D.advanced computer programs

15.According to the author, the passage mainly deals with ________________.

A.a tornado in Edmonton, Alberta

B.what’s a “Nowcast”

C.the disadvantage of conventional computer models of the weather forecast

D.a breakthrough in weather forecast