What is the main topic of this passage、

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• 1This passage will most probably be followed by a discussion of ________.

  A.the structure of American farming population

  B.the market structure of American agriculture

  C.the various functions of American agriculture

  D.the organization of American agriculture

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• 2The performance of farmers essentially determines ________.

  A.the size of the working population

  B.the organization of agriculture

  C.the market structure

  D.the general development of economy

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• 3The word “this” in Line 4 refers to ________.

  A.the provision of food and raw materials

  B.the productivity of farmers

  C.the production of investment goods

  D.the economy as a whole

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• 4What is most important to agriculture is ________.

  A.the amount of food it produces

  B.the per capital income of farmers

  C.its industrial performance

  D.the production of investment goods

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• 5This passage is most probably ________.

  A.a news item

  B.part of an introduction of a book

  C.part of a lecture

  D.an advertisement

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• 6Which of the following is the main reason for choosing Alamogordo as the test site、

  A.It always had an enjoyable climate.

  B.It was connected to other cities by a railway.

  C.Its location would hide the secret well.

  D.It was situated in southwestern New Mexico.

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• 7When was the atomic bomb dropped on Hiroshima、

  A.As soon as the secret was revealed

  B.At dawn on July 16, 1945

  C.Immediately after the test

  D.Several weeks after the test

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• 8After the first atomic bomb explosion, everybody agreed that ________.

  A.it was wise to choose Alamogordo as the test site

  B.man had entered the age of nuclear warfare

  C.it was not wise to use such a powerful weapon

  D.it was not possible to keep the technology of making atomic bombs secret

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• 9The tone of this passage is one of ________.

  A.anxiety

  B.satisfaction

  C.encouragement

  D.fear

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• 10The boy’s father bought him a large toy train ________.

  A.which to play with

  B.to play with it

  C.to play with

  D.at which to play

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