【单选题】
Because of their high fuel consumption at low levels,______prefer to remain at higher altitudes when they fly. ___
A. light and small aircraft
B. propeller aircraft
C. Jets
D. allaircraft
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答案
C
解析
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【单选题】
The standard altimeter setting is______inhpa. ___
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【单选题】
2500f/m rate of vertical speed is equal to______.___
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【单选题】
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【单选题】
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【单选题】
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