问题
单项选择题
电流、电压和功率是表征电信号能量大小的三个基本参量，在集中参数电路中测量的主要参量是（）。
A、电压
B、功率
C、电流
D、频率
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
电流、电压和功率是表征电信号能量大小的三个基本参量，在集中参数电路中测量的主要参量是（）。
A、电压
B、功率
C、电流
D、频率
参考答案：A
Sometimes things happen beyond expectation. A 10-year-old boy decided to study Judo（柔道） __1__ he had lost his left arm in a car accident. He began his __2_ with an old Japanese Judo teacher. He was doing well, but he could not __3__ why the teacher had taught him only one move for quite a long time. “Sir,” the boy finally said, “I think I should __4__ more moves.” “But this is the __5__ move you will ever need to know,” the master replied. Not quite understanding, the boy kept __6__. Several months later, the teacher __7__ the boy to his first tournament（锦标赛）. __8__ himself, the boy easily won his first two matches. The third match proved to be more __9__. However, after some time, the opponent（对手） became impatient. The boy used his one move to __10__ the match. Now the boy was in the finals. This time, his opponent was bigger, stronger and more __11__. Concerned that the boy might get __12__, the referee(裁判) wanted to stop the match. “No,” the teacher __13__, “let him continue.” Soon his opponent made a mistake. __14__ the boy used his move to attack him. The boy won the match and became the champion. On the way home, the boy and the teacher __15__ every move in every match. Then the boy asked __16__was really on his mind. “How did I win the tournament __17__ only one move?” “You won for two reasons,” the teacher answered. “First, you’ve __18__ one of the most difficult moves in Judo. And second, the only known __19__ for that move is to grasp your left arm. But you’ve lost it.” The boy’s biggest __20__ had become his biggest strength.
|