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发布时间: 1970-01-01

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1最佳选择题 3分

WhereHaveAlltheBeesGoneScientistswhostudyinsectsha

  • A. Honeybees are flying all across the country.
  • B. 25--40 percent of the honeybees in the US have died.
  • C. Honeybees are leaving their hives and do not return.
  • D. Honeybee hives are in disorder.
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2最佳选择题 3分

WhereHaveAlltheBeesGoneScientistswhostudyinsectsha

  • A. Because honeybees produce one-third of the foods we eat
  • B. Because honeybees feed on flowers.
  • C. Because honeybees eat seeds of flowers.
  • D. Both B and C.
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3最佳选择题 3分

WhereHaveAlltheBeesGoneScientistswhostudyinsectsha

  • A. Worsening environment.
  • B. Disease and chemicals.
  • C. Dwindling number of flowers around.
  • D. Changes in genes’ structures.
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4最佳选择题 3分

WhereHaveAlltheBeesGoneScientistswhostudyinsectsha

  • A. Bees’ genes allow them to expand their colonies.
  • B. Bees’ genes help keep them in their hives.
  • C. Bees’ genes make them fly from flower to flower.
  • D. Bees’ genes could explain the collapse of some colonies.
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5最佳选择题 3分

WhereHaveAlltheBeesGoneScientistswhostudyinsectsha

  • A. Farmers apply certain chemicals to kill unwanted bees.
  • B. The insecticide destroys the honeybee’s nervous system.
  • C. The insecticide affects the honeybee’s memory.
  • D. All of the above.
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