在图示的DHT11引脚中，串行数据引脚为（ ）。http://edu-image.nosdn.127.net/7F2643CB608A164AD054420784EBC8AE.jpg?imageView&thumbnail=890x0&quality=100
举一反三
- 中国大学MOOC: 3-8线译码器74LS138的引脚4为高电平时，输出http://edu-image.nosdn.127.net/_PhotoUploadUtils_f3ff8c47-547a-4df5-aea7-fa341efb52a4.png为http://edu-image.nosdn.127.net/C69FB941F254D587588DC03A965E814B.PNG?imageView&thumbnail=890x0&quality=100
- 图示为定轴轮系，其传动比大小满足http://edu-image.nosdn.127.net/93603D7ACFC7BC11ABD365A70E34C361.PNG?imageView&thumbnail=890x0&quality=100。http://edu-image.nosdn.127.net/FE6DBD5A6879276CDCB4F09D9D174C0A.PNG?imageView&thumbnail=890x0&quality=100
- 已知图示有压混联输水管路（按长管计）各管段的沿程阻力系数http://edu-image.nosdn.127.net/1443EEDD6C2FA09BB126BDB9642044BA.png?imageView&thumbnail=890x0&quality=100，管径http://edu-image.nosdn.127.net/974CD2163F1D3BFAAEDC8DA84872F1CA.png?imageView&thumbnail=890x0&quality=100，管长http://edu-image.nosdn.127.net/76A594A1299928A8955B35FC20252D31.png?imageView&thumbnail=890x0&quality=100，流量http://edu-image.nosdn.127.net/1D52DAEDDD85EC829BD9C6E6F96AE143.png?imageView&thumbnail=890x0&quality=100,,则http://edu-image.nosdn.127.net/DAC36D2F41C6C3F84F776BC849094BA1.png?imageView&thumbnail=890x0&quality=100中k=（ ）。http://edu-image.nosdn.127.net/06283F2B8E549ACD83D8DDBBD7E4BE7C.png?imageView&thumbnail=890x0&quality=100
- 图中所示集成块的1脚和28脚是哪两个引脚？http://edu-image.nosdn.127.net/A8F6802A17955E28E375693EC9C9D646.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