单项选择题

Article "Life Without Fuel" is ______.

A． a scientific study of life in 1997
B． an imaginary account of life in 1997
C． a history of life in 1997
D． a difficult time of life in 1997
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单项选择题
The FAA demonstration in para. 2 refers to ______.
A． the out-dated program FAA had used earlier for air-traffic control
B． the newly devised air-traffic control program on display
C． the showing of the location of low flying aircraft and private jets
D． the graphically screened commercial airliners
单项选择题
The reaction of meteorite researchers to the claims reported last August can be best described as ______.
A． shocked
B． dismayed
C． nervous
D． confused
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