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One of the missions of the Orbiting Crbon Observtory isto observe the formtion of CO2One o
f the missions of the Orbiting Crbon Observtory isto observe the formtion of CO2. B．to collect CO2 smples from spce. C．to do CO2 experiments in spce. D．to locte the key plces of CO2 emission.A．to observe the formation of CO2．B．to collect CO2 samples from spaceC．to do CO2 experiments in spaceD．to locate the key places of CO2 emission．
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