题目内容
耦合电感的顺串时等效电感为( ) 。
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符合无损耗、K=1和自感量、互感量均为无穷大，但两者比值是限值条件的变压器是()
对两个有耦合的线圈各取一个端子，当从这两个端子同时流入或流出电流时,它们在线圈中产生的自感磁通和互感磁通的方向相同，即“磁通相助”，则称这一对端子为_____________。
After months of hard training, Jim is now well on the way to ____________ his pilot's license.
This practice would offend against the ______ of fairness, since it only allows a few people to have the right to vote.
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