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题目材料:

The author of the passage most likely mentions that the inner asteroid belt is "the part of the asteroid belt from which objects are most likely to escape and travel to Earth" in order to
  • A.distinguish between two important sources of meteorites that travel to Earth
  • B.suggest that S-type asteroids are likely to be a source of meteorites
  • C.call into question an assumption about the compounds that dominate chondrites
  • D.explain why S-type asteroids do not reflect green, blue, and violet light as well as they reflect red and infrared light
  • E.provide evidence to support an assertion about the abundance of S-type asteroids

B显示答案

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