In talking about the question of where the moon came from, Professor Wetherill of the University of California said that he believes that the answer is _____.

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• 1The surface of the moon is _____.

  A.so hot that it warms the earth

  B.much colder at all times than the earth

  C.about the same as that of the earth in terms of heat and cold

  D.sometimes much hotter, sometimes much colder than the earth

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• 2The atmosphere of the moon is _____ that of the earth.

  A.much the same as

  B.harder to see than

  C.much different from

  D.cleaner than

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• 3The paragraph following the passage most likely discusses _____.

  A.unusual ways to advertise products

  B.types of payment plans for service

  C.theories about how products affect different levels of society

  D.how certain elements of a price "package" influence its market value

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• 4In the last sentence of the passage, the word "they" refers to _____.

  A.return privileges

  B.all the factors

  C.buyer and seller

  D.money

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• 5According to the passage, which of the following is NOT a factor in complete understanding of price、

  A.Instructions that come with a product.

  B.The quantity of a product.

  C.The quality of a product.

  D.Warranties that cover a product.

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• 6Since earth creatures cannot breathe in the moon's atmosphere, we can safely say that _____.

  A.it is impossible for people to live on the moon

  B.people would need special equipment in order to live on the moon

  C.there is no way to grow food there

  D.no one would want to live there

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