已知 NPN 型三极管的输入—输出特性曲线如图 所示,当 ( 1 ) U BE =0.7V , U CE =6V , I C = ? ( 2 ) I B =50μA , U CE =5V , I C = ? ( 3 ) U CE =6V , U BE 从 0.7V 变到 0.75V 时,求 I B 和 I C 的变化量,此时的
【简答题】Homebuyers _____1_____ are watching ________2________go up, up, and up. “How high can they go?” is the question on everyone’s __3__. “As long as _______4______stay around 5 percent, there’s no telling...
【简答题】阅读理解 Homebuyers nationwide are watching housing prices going up, up, and up. 'How high can they go?' Is the question on everyone's lips. 'As long as interest rates stay around 5 percent, nothing might...