单项选择题

A．It’’s 50 dollars.
B．It’’s 100 dollars.
C．It’’s 200 dollars.
D．The conversation didn’’t tell us.
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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.
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.
单项选择题
A．They want to change the way English is taught.B．They learn English to find well-paid jobs.C．They want to have an up-to-date knowledge of English.D．They know clearly what they want to learn.
A．They want to change the way English is taught.
B．They learn English to find well-paid jobs.
C．They want to have an up-to-date knowledge of English.
D．They know clearly what they want to learn.
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