[請益] TPO17 聽力lecture2 Milankovich
答案是B，想請問選項C為何不行呢?
謝謝
Over millions
of years, groundwater left deposits of a mineral called calcite, on the rock within Devil’s Hole.
And by studying these clacite deposits, we can determine the climate conditions,
the temperatures over the last half million years. Well, the Devil's
Hole findings contradicted the ones obtained during the 1970s, so basically
the question was, were the ages of one or both the samples were wrong,or were
scientists misunderstanding the significance of the evidence.
Well, in the 1990s, a new study was done on the two samples. And the ocean
floor samples were found to be correct, as were the samples from Devil’s Hole.
And now it is generally believed that the sample from Devil’s Hole correspond to variations in local climate, in the western United States,
rather than global climate changes.
5. What did calcite deposits from Devils Hole reveal?
A) Inaccurate information about long-term climate changes.
B) Evidence that contradicted Milankovitch’s hypothesis.
C) Evidence that climate changes occur only locally.
D) Variations in Earth’s orbit that had little impact on climate.
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