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The rate of sediment deposition may be _______ desertification in Central Asia: data from a Tajik site show the rate to have increased during Pleistocene glacial periods as aridity increased.
- A.a restraint on
- B.a gauge of
- C.an indicator of
- D.a factor in
- E.a hedge against
- F.a consequence of
B,C显示答案
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以上解析由 考满分老师提供。
