单 电源互补对称功率放大电路如图题4.7所示。 T 1 和 T 2 管的特性完全对称, 输入信号 u i 为正弦波。 U CC =12V , R L =8Ω , R 1 = R 3 =1.1kΩ , T 1 和 T 2 的 , U BE |=0.7V , , 设 D 1 、 D 2 、 R 2 中任意一个开路, 下面正确的说法是 ( ) 。
【简答题】根据汉语完成下列句子 1. 请在下午5点钟到达电影院。 Please _____ _____ the cinema at 5 0'clock in the afternoon. 2. 在中国,自行车是比较受欢迎的交通工具。 In China, bikes are very popular _____ of _____. 3. 马林不在家,他一定在学校。 Ma Lin isn't at home. ...
【简答题】A Shoe Pattern Harry is eigh years old now. He studies in a middle school. His parents like him very much and hope he can become a famous ma n . So they tell him to study hard and they do all for ...