|第2、3、4、5、6题：T[ornadoes,whirlwinds,and watersprouts are rotating funnel cloud air masses of small diameter.They are differentiated by the intensity of their rotation and by|
the surfaces that they traverse.Though tornadoes and whirlwinds both travel over land masses,whirlwinds are atmospheric systems smaller than tornadoes.Watersprouts are tornadoes that form or pass over a water surface.A tornado is a powerful vortex or “twister” whose rotational speeds are estimated to be near 300 miles per hour.The first visible indication of tornado development is usually a funnel cloud.As this funnel dips earthward,it becomes darker because of the debris
that is forced into its intensifying vortex.Some tornadoes give no visible warning until their destruction strikes the unsuspecting victim.Tornadoes often occur in groups,and several twisters sometimes descend from the same cloud base.The forward speed of a tornado is normally 30 to 40 miles per hour.In the short time that it takes to pass,a tornado can cause fantastic destruction.There have been cases reported in which blades of straw were embeded in fence posts.
31. How are tornadoes distinguished from whirlwinds?
A.Whirlwinds rotate in a different direction than tornadoes do.
B.Tonadoes travel over land and whirlwinds over water.
C.Tonadoes are larger than whirlwinds.
D.Only tornadoes are funnelshaped.
32. Why do tornadoes appear to be dark?
A.They occur only at night.
B.They are funnel-shaped.
C.They pick up debris from the ground.
D.They are water-laden.
33. According to the passage,which of the following behaviors is frequently
characteristic of funnel clouds?
A.Descending from different cloud bases.
B.Occurring in isolated areas.
C.Lasting a long time.
D.Occurring in groups.
34. According to the passage,some tornadoes take people unaware because they__.
A.produce a sound similar to thunder.
B.cannot be seen until it is too late.
C.look so much like other clouds.
D.carry so many large pieces of debris.
35. The author refers to straw embeded in fence posts in order to show __.
A.where tornadoes occur.
B.who makes reports about tornadoes.
C.when tornadoes take form.
D.how tornadoes affect physical objects.
|第8题：The police chief announced that the case would soon be inquired（）|
|第9题：A women has to be （）a man to go half as far|
A. twice as good as
B. as twice good as
C. twice good as
D. twice so good as
|第12题：The two statements are not consistent（）each other.One of them must be false.|
|第13题： Every people here is allowed to have his____at the meeting.|
|第14题：The Hotel____$100 for a single room with bath a night.|
|第16题：When seeing us they stopped（）with us.|
D.to have talked
|第17题：Everyone knows that the earth is spherical,（）?|
|第18、19、20、21、22题：Ironically,in the United States,a country of immigrants,prejudice and discrimination continue to be serious problems.There was often tension between each established group of immigrants and each succeeding group.As each group became more financially successful,and more powerful,they excluded newcomers from full participation in the society.Prejudice and discrimination are part of our history,however,this prejudicial treatment of different groups is nowhere more unjust than with black Americans.|
Blacks had distinct disadvantages.For the most part,they came to the “land of opportunity”as slaves and they were not free to keep their heritage and cultural
traditions.Unlike most European immigrants,blacks did not have the protection of a support group;sometimes slaveowners separated members of the same family.
They could not mix easily with the established society either because of their skin color.It was difficult for them to adapt to the American culture.Even after
they became free people,they still experienced discrimination in employment,housing,education,and even in public facilities,such as restroom.
26. Prejudice and discrimination____.
B.have been existing in the American society
C.don't exclude new immigrants from participation in the society
D.are mainly caused by the slavery
27. Established and succeeding immigrants____.
A.were reluctant to help newcomers to adapt to the new surroundings
B.were willing to support newcomers financially
C.were great helpers of slaves and Indians
D.were treated unequally by American Indians
28. One of the reasons why black Americans could not easily mix in American
A.that most Americans are immigrants
B.due to their skin color
C.that they speak their language differently from Americans
D.that they were free to keep their heritage
29. The author specifically mentions that____.
A.black Americans are most prejudicially treated in the U.S.
B.discrimination in the South was not more obvious than in the North
C.the situation of blacks is almost the same today as it was in the 1930s
D. after blacks became free people they didn't experience discrimination in
employment and public facilities
30. The attitude of the author is____.
|第23题：To the waitress' relief,the plate was left（）after being dropped onto the floor.|
|第24、25、26、27、28题：Icebergs are among nature's most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops them. They come into being-somewhere-in faraway, line frigid waters, amid thunderous noise and splashing turbulence, which in most cases no one hears or sees. They exist only a short time and then slowly away just as unnoticed. |
Objects of sheerest beauty, they have been called. Appearing in an endless variety of shapes, they may be dazzlingly white, or they may be glassy blue, green, or purple, tinted faintly or in darker hues. They are graceful, stately, inspiring-in calm, sunlit seas.
But they are also called frightening and dangerous, and that they are in the night, in the fog, and in storms. Even in clear weather one is wise to stay at a safe distance away from them. Most of their bilk is hidden below the visible top. Also, they may roll over unexpectedly, churning the waters around them.
Icebergs are parts of glaciers that break off, drift into the water, float about a while, and finally melt. Iceberg afloat today are made of anowflakes that have fallen over long ages of time. They embody snows that drifted down hundreds, or many thousands, or in some cases maybe a million year ago. The snows fell in polar regions and on cold mountains, where they melted only a little or not at all, and so collected to great depths over the years and centuries.
As each year's snow accumulation lay on the surface, evaporation and melting caused the snowflakes slowly fell on the top of the old, it too turned to icy grains. So blankets of snow and ice grains mounted layer upon layer and were of such great thickness that the weight of the upper layers compressed the lower ones. With time and pressure from above, the many small ice grains joined and changed to larger crystals, and eventually the deeper crystals merged into a solid mass of ice.
46. Which of the following is the best title for the passage?
A. The Name and Origin of Icebergs
B. The Size and Shape of Icebergs
C. The Dangers of icebergs
D. The melting of Icebergs
47. The author states that iceberg are rarely seen because they are _____.
A. broken by waves soon after they are found
B. hidden beneath the mountains
C. located in remote regions of the work
D. surrounded by fog
48. In Para 5, line 6 the expression "from above" refer to _______.
A. sunlit seas
B. polar regions
C. weight of mountains
D. layers of ice and snow
49. According to the passage, icebergs are dangerous because they _____.
A. usually melt quickly
B. can turn over suddenly
C. may create immense snowdrifts
D. can cause unexpected avalanches
50. "Dazzlingly" in Para 2 line 2 probably means _____.