已知如图8.4.6所示电路中双口网络的Y参数为y11=1s，y12=2s，y21=3s，y22=2s，=4∠30°V，RS=10Ω，ZL=2∠45°Ω，求输出

A .https://assets.asklib.com/psource/2015110110264544022.jpg B .https://assets.asklib.com/psource/2015110110265989461.jpg C .https://assets.asklib.com/psource/2015110110271219374.jpg D .https://assets.asklib.com/psource/2015110110272553626.jpg

A .https://assets.asklib.com/psource/2015110110304436211.jpg B .https://assets.asklib.com/psource/2015110110305876774.jpg C .https://assets.asklib.com/psource/2015110110311388037.jpg D .https://assets.asklib.com/psource/2015110110312795784.jpg

A .https://assets.asklib.com/psource/2015110110334621588.jpg B .https://assets.asklib.com/psource/2015110110340299751.jpg C .https://assets.asklib.com/psource/201511011034175015.jpg D .https://assets.asklib.com/psource/2015110110343034391.jpg

A .https://assets.asklib.com/psource/2015110110064980810.jpg B .https://assets.asklib.com/psource/201511011007091323.jpg C .https://assets.asklib.com/psource/2015110110072370179.jpg D .https://assets.asklib.com/psource/2015110110073874078.jpg

A . 0.29 B . -0.86 C . 1.04 D . 0.91

A .https://assets.asklib.com/psource/2015102715442257377.jpg B .https://assets.asklib.com/psource/2015102715442535355.jpg C .https://assets.asklib.com/psource/2015102715442726007.jpg D .https://assets.asklib.com/psource/2015102715443096508.jpg

若题图所示电路中二端口网络的A参数已知，则11&39;端口的输入电阻Z_in=______。 <img src='https://img2.soutiyun.com/ask/5499001-5502000/7cc3154445ed13f2c39a3500448c50d8.jpg' />

如图所示，已知总体<img src='https://img2.soutiyun.com/ask/2020-07-27/964696020421793.png' />为检验总体X的均值是否大于Y的均值.则应做检验() A.<img src='https://img2.soutiyun.com/ask/2020-07-27/964696034918622.png' /> B.<img src='https://img2.soutiyun.com/ask/2020-07-27/964696042946081.png' /> C.<img src='https://img2.soutiyun.com/ask/2020-07-27/964696050156494.png' /> D.<img src='https://img2.soutiyun.com/ask/2020-07-27/964696059093005.png' />

<img src='https://img2.soutiyun.com/shangxueba/ask/3927001-3930000/3927823/ct_jggysbnjxj_jggysbnjxchoose_0398(106).jpg' /> A．1.5A B．0.8A C．1A D．1.2A

<img src='https://img2.soutiyun.com/shangxueba/ask/18363001-18366000/18363488/2015110111020627758.jpg' /> A．-1 B． -3 C． 2.4 D． 4

<img src='https://img2.soutiyun.com/ask/2020-06-29/962270064181147.jpg' />

图示电路中，N为含源线性电阻网络，其端口伏安特性曲线如图(b)所示，其戴维南等效电路参数为()。 A．Uoc=-12V，R0=-3Ω B．Uoc=-12V，R0=3Ω C．Uoc=12V，R0=3Ω D．Uoc=12V，R0=-3Ω <img src='https://img2.soutiyun.com/ask/uploadfile/2766001-2769000/efeb2fb9e7ac950f1ab146ca4df3e402.jpg' />

A．<img src='https://img2.soutiyun.com/shangxueba/ask/18087001-18090000/18087885/2015102715442257377.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/18087001-18090000/18087885/2015102715442535355.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/18087001-18090000/18087885/2015102715442726007.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/18087001-18090000/18087885/2015102715443096508.jpg' />

<img src='https://img2.soutiyun.com/shangxueba/ask/18387001-18390000/18389473/2015110110302722226.jpg' /> A．<img src='https://img2.soutiyun.com/shangxueba/ask/18387001-18390000/18389473/2015110110304436211.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/18387001-18390000/18389473/2015110110305876774.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/18387001-18390000/18389473/2015110110311388037.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/18387001-18390000/18389473/2015110110312795784.jpg' />

<img src='https://img2.soutiyun.com/ask/2020-06-29/96227380449508.jpg' />

<img src='https://img2.soutiyun.com/ask/uploadfile/9060001-9063000/6df22c12705a20b2dccc7ffe5f0c81a8.jpg' />

已知电路参数如图题5.2.9 所示，FET工作点上的互导gn=1mS, 设rds>>Rd(1) 画出电路的小信号等效电路; (2)求电压增益AU; (3)求放大器的输人电阻Ri <img src='https://img2.soutiyun.com/ask/2020-06-29/962269587786899.jpg' />

A．因电阻R未知，故无法求出 B．3A C．2A D．-2A

A．-1 B．1 C．5 D．7

A．0.375A B．0.25A C．0.125A D．0.1875A

A．12.8W B．16W C．-12.8W D．-16W

A．116.3∠4.32°kV B．122.24∠4,5°kV C．114.14∠4.62°kV D．116.3∠1.32°kV