如下图所示共射基本放大电路,三极管β =100,当IB=10μA,VCC =12V,RC =4kΩ时,其C-E间直流工作点电压UCE为: A. 12V B. 8V C.
RBRc+Vcc+HTC2+uoUiRL四、(10分)在图示电路中,已知晶体管静态时B-E间电压为UBEQ,电流放大系数为β,B-E间动态电阻为rbe。填空:静态时,IBQ的表达式为,ICQ的表达式为,UCEQ的表达式为;电压放大倍数的表达式为,输入电阻的表达式为,输出电阻的表达式为;若减小RB,则ICQ将___,rbe将___,将___,Ri将___。 ...
I.从A、B、C、D四个选项中选出与所给字母有相同音素的选项。(10分))1.b A.fB.pC.jD.r)2.g A.iB.rC.pD.j)3.e A.IB.pC.hD
(10分)A Oh Where's yoor classrcemA: Hcllo, Jim. IB War's thatB: Oh. it's a picture of my scboolC. Let me help youAIt's nice. 2D. Whar's in your classroo?B It's here. Ler's go and seeE Where's your desk?A Great 3B: Many desks, chairs. pictures and lighus Look...
五、选出下列各组词中不同类的一个。(10分))1.A. bagB. rulerC.John)2.A. schoolB.byeC. goodbye)3.A.IB.youC.too)4.A. HelloB.HiC.OK)5. A. penB. pencilC. school 相关知识点: 试题来源: 解析 五、1.C 2.A 3.C 4.C5.C ...