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1、12月英语四六级考试阅读专项练习(4)Flying over a desert area in an airplane, two scientists looked down with trained eyes at trees and bushes. After an hours _11_ one of the scientists wrote in his book, Look here for _12_ metal. Scientists in another airplane, flying over a mountain region, sent a _13_ to other sc
2、ientists on the ground, Gold possible. Walking across hilly ground, four scientists reported, This ground should be searched for metals. 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 _14_ powers for lookin
3、g down below the earths surface. They were _15_ putting to use one of the newest methods of _16_ minerals in the groundusing trees and plants as _17_ that certain minerals may lie beneath the ground on which the trees and plants are growing.This newest method of searching for minerals is_18_on the f
4、act that minerals deep in the earth may _19_the kind of bushes and trees that grow on the surface.考试大全国教育类网站(wwwExamda。com)At Watson Bar Creek, a brook six thousand feet high in the mountains of British Columbia, Canada, a mineral search group gathered bags of tree seeds. Boxes were filled with smal
5、l branches from the trees. Roots were dug and put into boxes. Each bag and box was _20_ 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.A. signs B. sufficiently C. locating D. af
6、fectE. merely F. magic G. hints H. carefullyI. finding J. message K. flight L. probableM. revealing N. based O. information There are two factors which determine an individuals intelligence. The first is the sort of brain he is born with. Human brains differ considerably , some being more capable th
7、an others. But no matter how good a brain he has to begin with, an individual will have a low order of intelligence unless he has opportunities to learn. So the second factor is what happens to the individual the sort of environment in which he is brought up. If an individual is handicapped(不利) envi
8、ronmentally, it is likely that his brain will fail to develop and he will never attain the level of intelligence of which he is capable.The importance of environment in determining an individuals intelligence can be demonstrated by the case history of the identical twins, Peter and Mark. Being ident
9、ical, the twins had identical brains at birth, and their growth processes were the same. When the twins were three months old, their parents died, and they were placed in separate foster(抚养) homes. Peter was raised by parents of low intelligence in an isolated community with poor educational opportu
10、nities. Mark was reared in the home of well-to-do parents who had been to college. He was read to as a child, sent to good schools, and given every opportunity to be stimulated intellectually. This environmental difference continued until the twins were in their late teens, when they were given test
11、s to measure their intelligence. Marks I. Q. was 125, twenty-five points higher than the average and fully forty points higher than his identical brother. Given equal opportunities, the twins, having identical brains, would have tested at roughly the same level.21. This selection can best be titled_
12、.A. Measuring Your Intelligence B. Intelligence and EnvironmentC. The Case of Peter and Mark D. How the Brain Influences Intelligence22. The best statement of the main idea of this passage is that _.A. human brains differ considerablyB. the brain a person is born with is important in determining his
13、 intelligenceC. environment is crucial in determining a persons intelligenceD. persons having identical brains will have roughly the same intelligence23. According to the passage, the average I. Q. is_.A. 85 B. 100C. 110 D. 12524. The case history of the twins appears to support the conclusion that_
14、.A. individuals with identical brains seldom test at the same levelB. an individuals intelligence is determined only by his environmentC. lack of opportunity blocks the growth of intelligenceD. changes of environment produce changes in the structure of the brain25. This passage suggests that an indi
15、viduals I. Q. _.A. can be predicted at birth B. stays the same throughout his lifeC. can be increased by education D. is determined by his childhood As a reliable travel agency, we really do try to describe our centers and accommodation as realistically as possible. All our Super Centers and Main Ce
16、nters have been extensively investigated during the winter season 1975-1976. As a result we have first-hand information on the way in which hotels, life networks and ski schools, etc. operate during the season. We have not been able to investigate, at first hand, all our Independent Centers during the last season but all have been visited during the past three
