半径为 a 的无限长密绕螺线管,单位长度上的匝数为 n ,通以交变电流 i = I m sin w t ,则
A.
B.
C.
D.
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【单选题】The amount of force the clutch can hold depends on the between the clutch plate and the flywheel , and how much force the spring puts on the pressure plate.
【简答题】请翻译:The amount of force the clutch can hold depends on the friction between the clutch plate and the flywheel, and how much force the spring puts on the pressure plate.
【单选题】The amount of force the clutch can hold depends on the between the clutch plate and the flywheel , and how much force the spring puts on the pressure plate.
【单选题】The amount of force the clutch can hold depends on the _____between the clutch plate and the flywheel, and how much force the spring puts on the pressure plate.
【单选题】The amount of force the clutch can hold depends on the between the clutch plate and the flywheel , and how much force the spring puts on the pressure plate.