【多选题】短路电流峰值系数Kp的计算公式为,而,故Kp值取决于短路电路总电抗与总电阻之比,现取二个极端,即若电路中只有电阻或只有电抗,则Kp值应为()。
【单选题】听力原文:The record company hyped the double album of the Beatles songs for weeks before its release in the record stores. The record company promoted the two Beetles albums in a sensational way.
【单选题】等容式瓦斯解吸仪(测定K1)的压力范围为(),误差±2%。
【判断题】低压轮胎充气压力在150KP——450KP之间。()