【单选题】在图示的射极耦合差分式放大电路中, V CC = V EE = 10V , I O = 1mA , r o = 25k W , R c1 = R c2 = 10k W , BJT 的 β = 200 , V BE = 0.7V 。当 v i 1 = v i 2 = 0 时, V CE1 = V CE2 = ________ ;由 T 1 集电极单端输出时的差模电压增益 A v d1 » _____...
【简答题】Part B Below is a table showing tile figures about the changes in the ways people in a city spent their holidays in 1995 and 2005. Look at the table and write an essay of about 120 words refere...