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题目材料:

Which of the following can be inferred about the "carbonaceous meteorites" discussed in the passage?
  • AThey were once the most common types of meteorite intersecting Earth's orbit.
  • BThey are atypical among the meteorites that come from the asteroid belt.
  • CThey have isotopic abundances similar to those of the main belt comets.
  • DSome have D/H values that are lower than the D/H value of Earth's ocean water.
  • EMost have D/H values that are higher than D/H value of Earth's ocean water.

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