The subject of this passage is the______. From the information given in the passage, most minerals would melt fastest ______.

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问题 The subject of this passage is the______.
From the information given in the passage, most minerals would melt fastest ______.

选项 A、at 4,000 F, at sea level
B、at 4,000 F, 5,000 feet below sea level
C、at the exact center of the earth at 4,000 F
D、at 4,000 F, 5,000 feet above sea level

答案D

解析 根据第2段可知:在一定温度条件下物质的熔点温度与压力成反比。由此可推断D为正确答案。
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