单选题
From the information given in the passage, most minerals would melt fastest _______.
A、
at 40000F, at sea level
B、
at 40000F, 5000 feet below sea level
C、
at the exact center of earth at 40000F
D、
at 40000F, 5000 feet above the sea level
【正确答案】
D
【答案解析】
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