一个线圈,其感应电动势的大小与通过线圈的磁通量的()成正比。
A.最大值
B.有效值
C.变化率
D.增加值
参考答案:C
解析:根据法拉第电磁感应定律
我会填。
小明迷恋网络游戏。爸爸用韩愈的名言劝他:“________________,________________;________________,________________。”老师用陶渊明的话劝他:“________________,________________。________________,________________。”姐姐对他说:“只要你有志气,你现在改还来得及,因为_________________________________。
根据短文内容,从下面方框中选择适当的短语填空,使短文内容完整正确。
President Xi Jinping came to the Qing Feng Steamed Dumpling Shop for lunch on December 28th, 2013. Since then, the set meal of the president has been popular in China. Sun, a 33-year-old soldier, could have been home on Monday if he had 小题1: from Weifang, Shandong province. He would go 小题2: to Liaoning province. But he chose to change trains in Beijing with his five boxes. Sun arrived at the shop at about noon to join a line 小题3: 50 meters long. After waiting for nearly half an hour, he took his "president's meal". Then Sun joined another line to wait for a chance to sit in Xi's seat and have his photo taken there. Sun then quickly moved to another table because of 小题4: people who were waiting for their turns to be photographed at Xi's table. "The greatest honor I had during my stay in Beijing was to have a set meal of the president," he said. After getting one more photo of himself in front of the shop, Sun 小题5: to the train station.