A: [img=32x19]1803a98aa941f22.png[/img]
B: [img=32x19]1803a98ab26d026.png[/img]
C: [img=32x19]1803a98abc13099.png[/img]
D: [img=32x19]1803a98ac45f025.png[/img]
举一反三
- 一个多级放大电路由2个单管放大器构成，第一级放大电路的电压放大倍数为-50，输入电阻为[img=41x19]1803b4c4f23aecc.png[/img]，输出电阻为[img=32x19]1803b4c4fa402da.png[/img]；第二级放大电路的电压放大倍数为80，输入电阻为[img=32x19]1803b4c502f1f49.png[/img]，输出电阻为[img=32x19]1803b4c50aa3e8f.png[/img]；则多级放大电路的电压放大倍数、输入电阻、输出电阻各为________。 A: 30，[img=41x19]1803b4c512ebfdd.png[/img]，[img=32x19]1803b4c51ae473f.png[/img] B: 80，[img=32x19]1803b4c5238e27f.png[/img]，[img=32x19]1803b4c51ae473f.png[/img] C: -4000，[img=41x19]1803b4c512ebfdd.png[/img]，[img=32x19]1803b4c51ae473f.png[/img] D: -4000，[img=32x19]1803b4c5238e27f.png[/img]，[img=32x19]1803b4c54a18290.png[/img]
- 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]
- 设[img=162x19]17e0ab913cc7ca8.jpg[/img]且X，Y相互独立，则[img=84x19]17e0ab9147a14b0.jpg[/img]. A: 14 B: 22 C: 32 D: 40
- 设函数[img=39x20]18034b170c45af6.jpg[/img]，则曲线的拐点 A: [img=32x19]18034b1714beef8.jpg[/img] B: [img=33x17]18034b171d8b944.jpg[/img] C: [img=32x19]18034b17259f81d.jpg[/img] D: [img=34x14]18034b172def130.jpg[/img]
- 设函数[img=39x20]18034b1025f5fa2.jpg[/img]，则曲线的拐点 A: [img=34x14]18034b102de265a.jpg[/img] B: [img=32x19]18034b10361e70e.jpg[/img] C: [img=33x17]18034b103dfc589.jpg[/img] D: [img=32x19]18034b1045a4422.jpg[/img]
内容
- 0
设函数[img=39x20]18034b0eb08c5d3.jpg[/img]，则曲线的拐点 A: [img=34x14]18034b0eb9f7246.jpg[/img] B: [img=32x19]18034b0ec1bc6c4.jpg[/img] C: [img=33x17]18034b0ecaaf283.jpg[/img] D: [img=32x19]18034b0ed4648b4.jpg[/img]
- 1
题16中，晶体管T的[img=42x20]1803a98922fc017.png[/img] A: [img=46x19]1803a9892af9023.png[/img] B: [img=32x19]1803a98932c4476.png[/img] C: [img=32x19]1803a9893b4ae08.png[/img] D: [img=46x19]1803a989436a435.png[/img]
- 2
令F(x):x是有理数,G(x):x是实数。将命题“所有的有理数都是实数,但有的有实数不是有理数”符号化为() 未知类型：{'options': ['17e0a83a4157352.jpgx(F(x)∧G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)[img=14x9]17e0a73094b5dcf.jpg[/img][img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)[img=14x9]17e0a73094b5dcf.jpg[/img]G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)∧[img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)∧G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)∧[img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)[img=14x9]17e0a73094b5dcf.jpg[/img]G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)[img=14x9]17e0a73094b5dcf.jpg[/img][img=10x11]17e0a839b915354.jpg[/img]F(x))'], 'type': 102}
- 3
函数[img=109x19]18034b1661326e4.jpg[/img]的单调递增区间是 A: [img=49x19]18034b166a75f5f.jpg[/img] B: [img=32x19]18034b16729fc8f.jpg[/img] C: [img=49x19]18034b167ba53a3.jpg[/img] D: [img=32x19]18034b168424a1c.jpg[/img]
- 4
在含有0.1 mol/L的[img=105x20]17e0b390168b9ec.jpg[/img]的混合溶液中，逐滴加入AgNO3溶液时，难溶电解质的析出顺序为（ ）A.[img=32x19]17e0b3902890916.jpg[/img],AgCl,AgBr,AgIB.AgCl,AgBr,AgI,[img=32x19]17e0b3902890916.jpg[/img]C.[img=32x19]17e0b3902890916.jpg[/img],AgI,AgBr,AgClD.AgCl,[img=32x19]17e0b3902890916.jpg[/img],AgBr,AgI, 未知类型：{'options': ['17e0b3902890916.jpg,AgI,AgBr,AgCl', ' [img=32x19]17e0b3902890916.jpg[/img],AgI,AgBr,AgCl', ' [img=32x19]17e0b3902890916.jpg[/img],AgI,AgBr,AgCl', ' [img=32x19]17e0b3902890916.jpg[/img],AgI,AgBr,AgCl'], 'type': 102}