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1、第五单元检测(时间:90分钟满分:120分)第一部分阅读理解(共两节,满分40分)第一节(共12小题;每小题2.5分,满分30分)阅读下面短文,从每题所给的A、B、C、D四个选项中,选出最佳选项。AParicutin(帕里库廷火山) was born in Mexico in February,1943.At that time,Paricutin was 500 feet high,and it is now over 9,000 feet high.Today Paricutin is asleep.What is Paricutin?It is the first volcano in
2、the world which is seen from its birth right up to the present day.On February 20,1943,a peasant and his wife set out to work in their corn fields from the Mexican village of Paricutin.They were surprised to find the earth warm under their feet.Suddenly they heard a noise deep in the earth and a sma
3、ll hole appeared in their field.In the afternoon there was a sudden loud noise and stones were thrown high in the air.The peasants ran away from the field and turned back to watch.They saw the birth of a volcano.Large quantities of stones and lava broke out and a little hill began to form.By evening
4、 this hill was 100 feet high and hot ashes were falling on the village.At night the strong light of the hot lava lit up the countryside.The trees near the village were killed and the villagers had to leave their houses.When the village was destroyed,its name was given to the volcano.The news quickly
5、 reached Mexico City,far to the east.Many people came to watch the scene.The volcano grew and grew for ten years and hundreds of square miles of forests were destroyed.Then Paricutin went to sleep.1What was destroyed in the growing up of the volcano?A.The little hill of stone.B.The villagers living
6、close by.C.The forests and fields around Paricutin.D.The Mexican peasant and his wife.答案:C解析:细节理解题。从第三段中的“Thetreesnearthevillagewerekilledandthevillagershadtoleavetheirhouses.”看出,村子周围的树木和田野都被毁了。2In this passage the writer is trying to .A.tell us an interesting happeningB.explain a scientific theoryC
7、.make us believe somethingD.make up an interesting lie答案:A解析:主旨大意题。这是一道概括题,作者要告诉我们一个有趣的故事,一座火山竟然从脚底下冒出来。3What can we learn about volcanoes from this passage?A.New volcanoes may appear in places where people do not expect them to be.B.Volcanoes are always growing.C.Volcanoes are active from time to t
8、ime.D.New volcanoes are active for only ten years.答案:A解析:推理判断题。从第二段中的“Theyweresurprisedtofindtheearthwarmundertheirfeet.Suddenlytheyheardanoisedeepintheearthandasmallholeappearedintheirfield.”看出火山也许在人们没有预料到的地方冒出来。4What does the sentence “Then Paricutin went to sleep.” mean?A.Paricutin was tired.B.Pa
9、ricutin hasnt slept for two days.C.Paricutin caused too much damage.D.The eruption of Paricutin stopped.答案:D解析:句意理解题。帕里库廷火山的“睡眠”意指其“停止喷发了”。BAn annoying problem for humans,who like to boast(夸耀) about all the distant planets and moons we have explored,is that weve never taken a good look right under o
10、ur noses.The inside of the earth is relatively close,but how can we get there?The deepest oil well enters only six miles into the crust(地壳) (the center of the earth is about 4,000 miles deep).Russian scientists dug the deepest hole in Siberia,but bottomed out at about 7.5 miles below the surface.The
11、 Mohole project,a U.S.plan in the 1950s,called for drilling a hole 25 miles down to the boundary(分界线) between the hard rocks of the crust and the soft mantle(地幔).Sadly the project involved government supporting.It gets harder and harder to drill deep into the earth because rocks get softer and softe
12、r.Hard but easily broken at the surface,rocks become plastic(可塑的) at depth,and the pressure caused by the weight of the overlaying crustabout 52,800 pounds per square inch at a depth of ten miles,makes further drilling impossible. What little we know about the inside of the earth comes from indirect
13、 evidence,such as the analysis of earthquakes.So maybe its time for a thorough new method to explore the earths inside.Scientist David Stevenson says we should forget about drilling holes.Instead,we should open a crack(裂缝).Stevenson suggests digging a crack about a half mile long,a yard wide,and a h
14、alf mile deep with an explosion on the scale of a nuclear bomb.Next,hed pour a few hundred thousand tons of molten(熔化的) iron into the crack,along with a robot.The iron,thicker than the surrounding crust,would move downward at about 16 feet per second,carrying the robot with it and opening the crack
15、deeper and deeper.The iron mass would drop for about a week and 2,000 miles to the outer edge of the earth core,the robot sending out data to the surface.Stevenson compares his idea to space exploration.“Were going somewhere we havent been before,” he says.“In all possibility,there will be surprises
16、.”This idea can probably be put in the drawer marked with“Isnt Going to Happen”.The robot would have to survive temperatures that would melt pretty much anything.But Stevensons idea may inspire a new look at an old problem.Great things can come from what seems like impossible ideas.5Going inside the earth is than going into space.A.more interestingB.more possibleC.easierD.
