中国大学MOOC: 如图所示电路中,电阻R=( )Ω。http://edu-image.nosdn.127.net/18402F0B69F33655EB6CAD5C00E66BE5.jpg?imageView&thumbnail=890x0&quality=100
举一反三
- 逻辑电路如图(a) 所示,若各输入信号波形如图(b) 所示,则Q1、Q2的波形如图(c) 所示,对吗?假设两个触发器的初始状态均为0。http://edu-image.nosdn.127.net/BEBCCC056ABBD6F251A01C1C632863DF.png?imageView&thumbnail=890x0&quality=100 http://edu-image.nosdn.127.net/5592FA167A8A7D8C93AD633F0E01D161.png?imageView&thumbnail=890x0&quality=100http://edu-image.nosdn.127.net/C853EF51EFF13D688C5BEDB9CD8C030C.png?imageView&thumbnail=890x0&quality=100
- 中国大学MOOC: 图(a)的诺顿等效图如图(b)所示,则图(b)中 Io= A,Ro= Ω。http://edu-image.nosdn.127.net/4018D75B6550915CDE33EED39E870551.png?imageView&thumbnail=890x0&quality=100 http://edu-image.nosdn.127.net/6325E7C7A0214BF71330DC72B2EECCDE.png?imageView&thumbnail=890x0&quality=100 (a) (b)
- 中国大学MOOC: 图(a)的戴维南等效图如图(b)所示,则图(b)中Uo= V,Ro= Ω。http://edu-image.nosdn.127.net/50E9EF209369F32D684FAE0A941D9CDC.png?imageView&thumbnail=890x0&quality=100 http://edu-image.nosdn.127.net/E3F6E50E9BBB665D9D085C2689D2F094.png?imageView&thumbnail=890x0&quality=100 (a) (b)
- 中国大学MOOC:"下图所示工具为( )。http://edu-image.nosdn.127.net/D6BFA044A165F7787DDF229A39C5C236.jpg?imageView&thumbnail=890x0&quality=100http://edu-image.nosdn.127.net/2F463E8BC7003C7A6DE10AD41DB2F19E.jpg?imageView&thumbnail=890x0&quality=100http://edu-image.nosdn.127.net/A703FA1F4FAFAE1A1224262AF1D87971.jpg?imageView&thumbnail=890x0&quality=100";
- 中国大学MOOC: 下列取代羧酸中酸性最强的是()。http://edu-image.nosdn.127.net/7C237BDF245EC393A5506C4874523609.png?imageView&thumbnail=890x0&quality=100、http://edu-image.nosdn.127.net/EFA954264582A372C3C9085E40BE80E9.png?imageView&thumbnail=890x0&quality=100、http://edu-image.nosdn.127.net/926CD4F17B92218A7FF5D06D34C5CAAF.png?imageView&thumbnail=890x0&quality=100、http://edu-image.nosdn.127.net/6504083F25D32BC8A95C11AC770935E2.png?imageView&thumbnail=890x0&quality=100