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【单选题】Lesson Two Text A Vocabulary Multiple choices-10 10. Cabin depressurization above 1000feet may lead to unconsciousness or severe performance ______ of the aircrew, therefore, it requires an emergency descent to a safety altitude.
【单选题】Lesson Two Text A Vocabulary Multiple choices-10 10. Cabin depressurization above 1000feet may lead to unconsciousness or severe performance ______ of the aircrew, therefore, it requires an emergency descent to a safety altitude.
A、upgradation
B、degradation
C、dsyfunctioning
D、betterment
A.
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问答题
直流电机直接启动，启动电流大，启动转矩大，有大的电流冲击和机械冲击
答案：
直流电机直接启动时，确实存在启动电流大和启动转矩大的特点，但同时也伴随着一些潜在的问题，如电流冲击和机械冲击。1. 启动...
