单项选择题

What is the future work planned to do

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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单项选择题
If you ______ Jerry Brown until recently, you'd think the photograph on the right was strange.
A．shouldn't contact
B．weren't to contact
C．didn't contact
D．hadn't contacted
单项选择题
______ both sides accept the agreement ______ a lasting peace be established in this region.
A．Only if, will
B．If only, would
C．Should, will
D．Unless, would
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