单项选择题

A．For high speed transportation.
B．For extremely high altitude flights.
C．For overseas passenger transportation.
D．For urgent mission to places inaccessible to other kinds of craft.
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单项选择题
A．Every glance has its significance.B．A glance conveys more meaning than words.C．A gaze longer than 3 seconds is unacceptable.D．Staring at a person is an expression of interest.
A．Every glance has its significance.
B．A glance conveys more meaning than words.
C．A gaze longer than 3 seconds is unacceptable.
D．Staring at a person is an expression of interest.
填空题
E
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