In"All that's needed to become one…(paragraph2)"，what does the word"one"stands for、

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• 1What are citizen scientists asked to do、

  A.To develop a specific research interest and become professional scientists．

  B.To send their research observations to a professional database．

  C.To increase their knowledge about climate change．

  D.To keep a record of their research observations．

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• 2Ecologists turn to non-scientist citizens for help because they need them

  A.to provide their personal life cycles．

  B.to observe the life cycle of plants．

  C.to collect data of the life cycle of living things．

  D.to teach children knowledge about climate change．

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• 3What is the author's attitude towards one．room schools、

  A.Critical．

  B.Humorous．

  C.Angry．

  D.Praising．

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• 4It can be learned from paragraph 2 that many parents in Nebraska

  A.don't like centralized schools

  B.come from other states．

  C.received education in one-room schools．

  D.prefer rural life．

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• 5A major characteristic of the one-room school system is that

  A.1earning is not limited to one grade level．

  B.pupils mostly study math and English．

  C.some children have to be left back．

  D.teachers are always busy．

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• 6What is NOT true of Project BudBurst、

  A.Only experts can participate in it．

  B.Everybody can participate in it．

  C.It collects life cycle data on a variety of common plants．

  D.It has its own website．

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• 7What is the final purpose of Project BudBurst、

  A.To study when plants will have their first buds．

  B.To find out the types of plants in the neighborhood．

  C.To collect life cycle data on a variety of common plants from across the United States．

  D.To investigate how plants and animals will respond as the climate changes．

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