单项选择题

A．Bone structure.
B．Smell ability.
C．Birth mode.
D．Recover ability against diseas
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单项选择题
A．Soil.B．Human population.C．Forest.D．Water.
A．Soil.
B．Human population.
C．Forest.
D．Water.
单项选择题
A．Acquire information from satellites more efficiently.B．To realize full coverage of area the satellite passes over.C．Building more ground observation centers.D．Compare satellites information with those from groun
A．Acquire information from satellites more efficiently.
B．To realize full coverage of area the satellite passes over.
C．Building more ground observation centers.
D．Compare satellites information with those from groun
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