(E) offer two explanations for a phenomenon
9. According to the passage, one advantage of studying the isotope record of ocean sediments is that it
(A) corresponds with the record of ice volume taken from rocks on land
(B) shows little variation in isotope ratios when samples are taken from different continental locations
(C) corresponds with predictions already made by climatologists and experts in other fields
(D) confirms the record of ice volume initially established by analyzing variations in volcanic emissions
(E) provides data that can be used to substantiate records concerning variations in the amount of sunlight received by the Earth
参考答案:DDBC BCEAB
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