阅读理解
Flying over a desert area in an airplane, two scientists looked down with trained eyes at trees and bushes. After an hour's flight one of the scientists wrote in his book, ‘Look here for probable metal.’ Scientists in another airplane, flying over a mountain area, sent a message to other scientists on the ground, ‘Gold possible.’ Walking across hilly ground, four scientists reported, ‘This ground should be searched for metal.’ From an airplane over a hilly wasteland a scientist sent back by radio one word: ‘Uranium.’
None of the scientists had X-ray eyes: they had no magic powers of looking down below the earth's surface. They were merely putting to use one of the newest methods of locating minerals in the ground, using trees and plants as signs that certain minerals may lie beneath the ground on which the trees and plants are growing.
This newest method of searching for minerals is based on the fact that minerals deep in the earth may affect the kind of bushes and trees that grow on the surface.
At Weston Bar Greek, a brook (小溪) six thousand feet high in the mountains of British Columbia, Canada, a mineral search group gathered bags of tree seeds. Boxes were filled with small branches from the trees. Roots were dug and put into boxes. Each bag and box was carefully marked. In a scientific laboratory the parts of the forest trees were burned to ashes and tested. Each small part was examined to learn whether there were minerals in it.
Study of the roots, branches, and seeds showed no silver. But there were small amounts of gold in the roots and a little less gold in the branches and seeds. The seeds growing nearest to the tree trunk had more gold than those growing on the ends of the branches.
1.Scientists were flying over a desert of a hilly wasteland or a mountain area in order to search for ________ in the ground.
[ ]
2.The study of trees, branches and roots shows that ________.
[ ]
A.there were larger amounts of gold in the branches than in the seeds
B.there were smaller amounts of gold in the roots than in the branches
C.there were less amounts of gold in the seeds growing on the ends of branches than seeds growing nearest to the tree trunk
D.there was more gold in the branches than in the roots
3.Which is the best title suggested below?
[ ]
A.Scientists Searching for Metals with Special Power
B.New Methods of Searching for Minerals
C.Gold Could Be Found by Trees and Plants
D.A New Method of Searching for Minerals-Using Trees and Plants
4.Which of the following is not mentioned as part of a tree that can help find minerals?
[ ]
5.The scientists were in search for minerals by using ________.
[ ]
科目:高中英语 来源: 题型:053
阅读理解
It was the middle of April of 1975.A large number of birds were flying northward. Thousands of ducks led the way as they usually do.
But things were different that year.The north winds were very strong. Heavy snowstorms came quite late in the spring.The birds badly needed a place to get out of the storms and to rest during their long flights. Thousands of ducks found a place to rest in Nebraska.
At that time a terrible disease that kills birds broke out in Nebraska.Ducks were dying in great numbers.Hawks that lived nearby were spreading (传播) the disease to the water birds that landed on the small lakes.
The wildlife workers (野生动物保护工作者)were not able to stop the terrible disease.As they worried over the dying birds, they suddenly thought of something even worse. In a few days the whoopers (美洲鹤), one of the most beautiful birds, were going to fly across the state.
What would happen if even one of the forty-nine remaining whoopers was to land near the sick birds? If a whoopers got the disease, it could spread to all the rest.
A bad snowstorm blew over Nebraska as the first whoopers fought their way across the state. They were forced down by the storm. And they landed right in the middle of one of the places where the disease was spreading. A farmer was the first to see the nine whoopers on the lake.The wildlife workers quickly prepared to save the whoopers. They worked for long hours trying to frighten the birds away to a safe place.They fired guns, but the whoopers refused to move.
At last it stopped snowing! With a small plane the workers were able to drive all but two of the whoopers to a safe place.
All night long the workers stayed in the cold as they watched over the whoopers.Suddenly, as day began to break, the last two whoopers took off. They were driven by the airplane to a safe place.
Slowly the winds became less strong. The nine whoopers flew off to the north. The wildlife workers were tired but happy.
1.What was the unusual thing that happened in Nebraska in 1975? ______.
[ ]
A.Ducks led the way as a large number of birds flew north
B.Ducks couldn’t find a place to rest in Nebraska
C.A terrible disease that kills birds broke out
D.Heavy snowstorms came early in the spring
2.What made things even worse was that ______.
[ ]
A.hawks got the disease and spread it to the water birds
B.the whoopers flying by would be in danger of catching the disease
C.thousands of ducks died
D.the wildlife workers were not able to stop the disease
3.the wildlife workers did all the following things to save the whoopers EXCEPT ________.
[ ]
A.firing guns to get the whoopers away from the sick birds
B.watching over the whoopers the whole night
C.using a small plane to drive the whoopers to safety
D.gathering the sick and dead birds with a small plane
4.In the end , the nine whoopers flew off to the north when ______.
[ ]
A.the night was over B.it stopped snowing
C.there was less wind D.the winds stopped
5.Which of the following is NOT TRUE ?______.
[ ]
A.The wildlife workers were happy because they had done their best to protect the whoopers
B.The wildlife workers acted quickly when they were needed to save the whoopers
C.The whooper is a bird which is not commonly found
D.The whoopers always land on the lakes in Nebraska when flying north
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