单项选择题

A．To carry information that would help determine elevation.
B．To provide accurate weather reports.
C．To relay information from scientists around the world.
D．To indicate which route the mountain climbers should take.
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单项选择题
A．He’s sorry that the woman didn’t like the book.B．She can get her money back after ten days.C．It’s too late for the woman to get a refund.D．He should be sympathetic toward the woman.
A．He’s sorry that the woman didn’t like the book.
B．She can get her money back after ten days.
C．It’s too late for the woman to get a refund.
D．He should be sympathetic toward the woman.
单项选择题
A．Detailed maps from previous studies.B．Recent advances in technology.C．Plenty of funding for the study.D．Experience carrying heavy loads up mountains.
A．Detailed maps from previous studies.
B．Recent advances in technology.
C．Plenty of funding for the study.
D．Experience carrying heavy loads up mountains.
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