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.
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单项选择题
A．They want to be more powerful than other American minorities.B．They want to gain more economic benefits.C．They want to be united into a new political force.D．They want to be absorbed into American culture.
A．They want to be more powerful than other American minorities.
B．They want to gain more economic benefits.
C．They want to be united into a new political force.
D．They want to be absorbed into American culture.
单项选择题
A．To indicate how climbers communicated.B．To show that climbers enjoyed many comforts.C．To show that modern telephones work at high altitudes.D．To emphasize how small some equipment had become.
A．To indicate how climbers communicated.
B．To show that climbers enjoyed many comforts.
C．To show that modern telephones work at high altitudes.
D．To emphasize how small some equipment had become.
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