单项选择题

From the information given in the passage, most minerals would melt fastest _____________.

A．at 4,000°F, 5,000 feet below sea level
B．in the absence of oxygen
C．at 4,000°F, 5,000 feet above sea level
D．at the exact center of the earth at 4,000°F

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热门试题

单项选择题

He had always kept a ___________ eye on what was happening around him.

A．clear
B．keen
C．distinct
D．sensitive

单项选择题

President Fujimori was driven out of office because _____________.

A．he was an autocratic leader
B．Mr. Toledo's protest campaign was successful
C．Peru's economy was stagnant
D．there was a political uproar after the bribery scandal was exposed