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 ground.
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单项选择题
A．We need our friends to share similar interests and activities.B．We need our teachers to guide us.C．We need co-workers to help us.D．A lonely person’s popularity may be increased with more social contacts.
A．We need our friends to share similar interests and activities.
B．We need our teachers to guide us.
C．We need co-workers to help us.
D．A lonely person’s popularity may be increased with more social contacts.
单项选择题
A．Because he reads too many books.B．To learn how to separate the important from the unimportant.C．To be well-informed.D．Because he always wastes his time.
A．Because he reads too many books.
B．To learn how to separate the important from the unimportant.
C．To be well-informed.
D．Because he always wastes his time.
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