19、 第四部分：阅读理解
Egypt felled byfamine
Even ancient Egypts mighty pyramid builders were powerless in theface of the famine that helped bring down their civilian around 2180BC. Nowevidence gleaned from mud deposited by the River Nile suggests that a shift inclimate thousands of kilometers to the south was ultimately to blem -- and thesame or worse could happen today.
The ancient Egyptians depended on theNiles annual floods to irrigate their crops. But any change in climate thatpushed the African monsoons southwards out of Ethiopia would have diminishedthese floods.
Dwindling rains in the Ethiopian highlands would have meantfewer plants to establish the soil. When rain did fall it would have washedlarge amounts of soil into the Blue Nile and into Egypt, along with sedimentfrom the White Nile.
The Blue Nile mud has a different isotope signaturefrom that of the White Nile. So by analyzing isotope differences in muddeposited in the Nile Delta, Michael Krom of leeds University worked out whatproportion of sediment came from each branch of the river.
Krom reasonsthat during periods of drought, the amount of the Blue Nile mud in the riverwould be relatively high. He found that one of these periods, from 4,500 to4,200 years ago, immediately predates the fall of the Egypts OldKingdom.
The weakened waters would have been catastrophic for theEgyptians. Changes that affect food supply dont have to be very large to have aripple effect in societies, says Bill Ryan of the Lamont Doherty EarthObservatory in New York.
Similar events today could be even moredevastating, says team member Daniel Stanley, a geoarchaeologist from theSmithsonian Institution in Washington, D.C.. Anything humans do to shift theclimate belts would have an even worse effect along the Nile system because thepopulations have increased dramatically.
1. Why does the author mentionpyramid builders?
A. because they once worked miracles.
B. becausethey were well-built
C. because they were actually very weak
D.because even they were unable to rescue their civilization
2. Which of thefollowing factors was ultimately responsible for the fall of the civilization ofancient Egypt?
A. Change of climate
B. famine
C. food
D.population growth
3. Which of the following statements is true?
A. TheWhite Nile is the trunk of the River Nile
B. The White Nile is the trunk ofthe Blue Bile
C. The White Nile a branch of the Blue Nile
D. The WhiteNile and the Blue Nile are branches of the River Nile
4. According to Krom,Egypts Old Kingdom fell
A. immediately after a period of drought
B.immediately after a period of flood
C. just before a drought struck
D.just before a flood struck
5. The word devastating in the last paragraphcould be best replaced by
A. frustrating
B. damaging
C.defeating
D. worrying
标准答案： D,A,D,A,
20、
标准答案：B,A,B,C,C
21、
标准答案：A,B,D,C,A
22、
第五部分：补全短文(每题2分，共10分)
阅读下面的短文，文章中有5处空白，文章后有6组文字，请根据文章的内容选择5组文字，将其分别放会文章原有位置，以恢复文章原貌。请将答案涂在答题卡相应的位置。
标准答案：C,B,E,F,D
23、
第6部分：完型填空 (每题1分，共15分)
The Greatest Mystery ofWhales (鲸鱼)
The whale is a mammal(哺乳动物)- warm-blooded, air-breathing,giving birth to its young alive, sucking them - and, like all mammals,originated on land. There are many signs of this. 1 front flippers(鳍状肢), usedfor steering and stability, are traces of feet.
Immense strength is builtinto the great body of the big whales, and in fact most of a whale's body is onegigantic(强有力的)muscle. The blue whale's pulling 2 has been estimated at 400horsepower. One specimen was reported to have 3 a whaling vessel for seven hoursat the 4 of eight knots.
An enraged whale will attack a ship. A famous 5 ofthis was the fate of whaler Essex, which was sunk 6 South America early in thelast century. More recently, steel ships have had their plates buckled in thesame way. Sperm whales were known to 7 the old-time whaleboats in their jaws andcrush them.
The greatest mystery of whales is their diving ability. Thesperm whale 8 the bottom for his favorite food, the octopus. 9 he is known to goas far down as 3,200 feet, where the pressure is 1,400 pounds, to the squareinch. Doing 10 he will remain submerged as long as one hour. Two feats areinvolved in this: storing up enough 11 (all whales are air-breathed)andwithstanding the great change in pressure. Just 12 he does it scientists havenot determined. It is believed that some of the oxygen is stored in a specialsystem of blood vessels, rather than just held in the lungs. And 13 that aspecial kind of oil in his head is some sort of compensating mechanism thatautomatically adjusts the internal pressure of his body. But 14 you can'tbring a live whale into the laboratory for study, no one just 15 how thesethings work.
1. A)Its B)His C)Theirs D)Their
2. A)width B)strength C)height D)length
3. A)eaten B)crashed C)lifted D)towed
4. A)distance B)voyage C)rate D)sail
5. A)picture B)example C)film D)book
标准答案： A,B,D,C,B
24、http://ks.examda.com
6. A)away the coastof B)of the coast of C)off the coast of D)in the coast of
7. A)seize B)hit C)damage D)overturn
8. A)sink to B)dive to C)rest on D)hideon
9. A)In spite of that B)Because of this C)In that search D)Insupport of this
10.A)the same B)such C)above D)so
标准答案：C,A,B,C,D
25、
11. A)oxygen B)air C)energy D)heat
12.A)whatB)where C)how D)when
13. A)it is believed B)it believes C)we believeD)he believes
14. A)because of B)due to C)owing to D)since
15. A)communicates B)hears C)knows D)develops
标准答案： A,C,A,D,C
