【简答题】Everyone hates to wait in lines. We get that anxious feeling that our precious life is slipping away while we’re doing something so meaningless. But it’s not always the length of the wait we find so u...
【判断题】在图( a )所示锯齿波 -矩 形波发生器中,已知 A 1 、 A 2 均为理想运算放大器,其输出电压的两个极限值为 ± 12V ; 二极管的伏安特性如图( b )所示;设振荡周期为 T ,一个周期内 u O1 为高电平的时间为 T 1 ,占空比= T 1 / T 。(温馨提示,以下9个问题的电路图相同,请先copy电路以便答题) 判断以下结论是否正确: 电容 C 的容量减小时,振荡频率 f 增大...
【简答题】Dear Michelle, My Dad hates my Mom. He tells me that she is a liar and that I should not trust her. Of course, they are divorced but they have “joint custody” (共同监护). What a joke! I am 15, my brother ...
【判断题】在图( a )所示锯齿波 -矩 形波发生器中,已知 A 1 、 A 2 均为理想运算放大器,其输出电压的两个极限值为 ± 12V ; 二极管的伏安特性如图( b )所示;设振荡周期为 T ,一个周期内 u O1 为高电平的时间为 T 1 ,占空比= T 1 / T 。(温馨提示,以下9个问题的电路图相同,请先copy电路以便答题) 判断以下结论是否正确: 输出电压 u O1 的峰 -峰 值为 12...
【简答题】Dear Michelle: My Dad hates my Mom. He tells me that she is a liar and that I should not trust her. Of course, they are divorced but they have “joint custody(共同监护)”. What a joke! I am 15, my brother i...