A.Because Panda is also called Panda Bear. B.Because Panda looks like a bear. C.Because Panda has a cousin, Red Panda. D.Because Panda has Red Panda share many characteristics with both bears and raccoons.
【简答题】指出题图属于什么电路,并计算R f 的阻值。 (R 1 =5.1KΩ , u i =0.2V , u o =-3V) ( 图参阅书 P165 图 4-10 ) (2)u i =10 sin314tV, A uf =-10 ,画出u o 的波形? (3)R 1 =5K Ω, A uf =-10 ,求R f ?