[单项选择]Tomorrow evening about 20 million Americans will be shown, on their television screens, how easy it is to steal plutonium and produce "the most terrifying blackmail weapon ever devised"-a home-made atomic bomb.
They will be told that no commercial nuclear plant in the United States - and probably in the World-is adequately protected against a well planned armed attack by terrorists, and that there is enough information on public record to guide a nuclear thief not only to the vaults of nuclear plants where plutonium is stored, but also to tell him how the doors of those vaults are designed.
The hour-long television programme, "The Plutonium Connection", makes its point by showing how a 20-year-old student of the Massachusetts Institute of Technology in five weeks designed an atomic bomb composed of plutonium and parts from a hardware store.
The young man, whose identity is being kept secret for fear he may be kidnapped by terrorists; is quoted as saying: "’I was pretty s
A. during his studies at Massachusetts Institute of Technology.
B. from information available on TV programmes.
C. from information he found in science libraries.
D. at a hardware stor

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[单项选择]Tomorrow evening about 20 million Americans will be shown, on their television screens, how easy it is to steal plutonium and produce "the most terrifying blackmail weapon ever devised"-a home-made atomic bomb.
They will be told that no commercial nuclear plant in the United States - and probably in the World-is adequately protected against a well planned armed attack by terrorists, and that there is enough information on public record to guide a nuclear thief not only to the vaults of nuclear plants where plutonium is stored, but also to tell him how the doors of those vaults are designed.
The hour-long television programme, "The Plutonium Connection", makes its point by showing how a 20-year-old student of the Massachusetts Institute of Technology in five weeks designed an atomic bomb composed of plutonium and parts from a hardware store.
The young man, whose identity is being kept secret for fear he may be kidnapped by terrorists; is quoted as saying: "’I was pretty s
A. the plants are not properly safeguarded.
B. the local police are not efficient enough.
C. plutonium has been stolen before.
D. they were badly designed

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[单项选择]

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Tomorrow evening about 20 million Americans will be shown, on their television screens, how easy it is to steal plutonium (钚) and produce "the most terrifying blackmail weapon ever devised" -- a homemade atomic bomb.
They will be told that no commercial nuclear plant in the United States -- and probably in the world -- is adequately protected against a well planned armed attack by terrorists, and that there is enough information on public record to guide a nuclear thief not only to the underground rooms of nuclear plants where plutonium is stored, but also to tell him how the doors of those underground rooms are designed.
The hour-long television programme, "The Plutonium Connection", makes its point by showing how a 20-year-old student of the Masschusetts Institute of Technology in five weeks designed an atomic bomb composed of plutonium and parts from a hardware store.
The young man, whose ident
A. To find out how to design a bomb.
B. To find out where to steal plutonium.
C. To look at files of secret information.
D. To find out where to stem an atomic bomb.

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[简答题]

Part B
Until about two million years ago Africa’s vegetation had always been controlled by the interactions of climate; geology, soil, and groundwater conditions; and the activities of animals. The addition of humans to the latter group, however, has increasingly rendered unreal the concept of a fully developed "natural" vegetation-- i. e. , one approximating the ideal of a vegetational climax. (41) _____________________. Early attempts at mapping and classifying Africa’s vegetation stressed this relationship: sometimes the names of plant zones were derived directly from climates. In this discussion the idea of zones is retained only in a broad descriptive sense.
(42) _____________________. In addition, over time more floral regions of varying shape and size have been recognized. Many schemes have arisen successively, all of which have had to take views on two important aspects: the general scale of treatment to be adopted, and the deg

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[单项选择]A. 80 million. B. 70 million.
C. More than 3,500 million. D. About 3,000 million.

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[单项选择]A. 13 million. B. 30 million. C. 14 million. D. 40 million.

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[填空题]evening

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