放大电路及参数如题51所示,则其从电容C1右侧看过去的输入电阻[img=37x22]1803a98a605a520.png[/img]___________________
A: [img=50x19]1803a98a68cdc66.png[/img]
B: [img=50x19]1803a98a7028603.png[/img]
C: [img=50x19]1803a98a795fb42.png[/img]
D: [img=32x19]1803a98a81d0ad1.png[/img]
A: [img=50x19]1803a98a68cdc66.png[/img]
B: [img=50x19]1803a98a7028603.png[/img]
C: [img=50x19]1803a98a795fb42.png[/img]
D: [img=32x19]1803a98a81d0ad1.png[/img]
举一反三
- 设f(x)=[img=50x19]17e0bb9e8343c64.jpg[/img]则f[f(1)]=__________. A: 0 B: 1 C: 2 D: 3
- 放大电路及参数如题51所示,则其输出电阻[img=39x22]1803a98a90a3817.png[/img] A: [img=32x19]1803a98aa941f22.png[/img] B: [img=32x19]1803a98ab26d026.png[/img] C: [img=32x19]1803a98abc13099.png[/img] D: [img=32x19]1803a98ac45f025.png[/img]
- 用性质描述法表示集合{-5 ,5},正确的是() 未知类型:{'options': ['{x〡x+5=0}', ' {x〡x-5=0}', ' {x〡[img=50x19]17da5f73610949a.jpg[/img]}', ' [img=112x31]17da5f736ab6c3e.jpg[/img]'], 'type': 102}
- 19、不等式[img=129x24]18031ef3b487214.png[/img]的解集为{x|x>3或x<2}
- 下列4个集合中是空集的是() A: {x|[img=18x22]1802f060e2f728f.png[/img]+1=0} B: {x|[img=18x22]1802f060e2f728f.png[/img]<-x} C: {x|[img=18x22]1802f060e2f728f.png[/img]=0} D: {x|[img=18x22]1802f060e2f728f.png[/img]-1=0}