【填空题】
48.和谐型机车采用空电联合制动有哪些特点___
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变压器并列运行,一般允许阻抗电压有±10%的差值,若差值大,可能阻抗电压大的变压器承受负荷偏高,阻抗电压小的变压器承受负荷偏低,从而影响变压器的经济运行。___
A. 对
B. 错
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Pilot turns on squawk______to request a squawk number. ___
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管制员在对空指挥过程中，越是繁忙的时候，语速应___
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The standard altimeter setting is______inhpa. ___
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2500f/m rate of vertical speed is equal to______.___
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陆空通话时，什么时候推荐使用“IMMEDIATELY（立即）”这个词：___
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What is the best course of action for a pilot to follow when thunderstorms are observed along the route of flight? ___
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ATC clearance does not contain______.___
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“MAYDAY” is the international RTF______signal.___
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