绘制阳台时，如图所示的双斜线，表示（ ）http://edu-image.nosdn.127.net/1BED9EDF6006EDF87FE073AE7AD009D9.png?imageView&thumbnail=890x0&quality=100
举一反三
- 绘制阳台时，如图所示的双斜线，表示（ ）http://edu-image.nosdn.127.net/5B22F03EDB3A43D10B791AE8F8E744E7.png?imageView&thumbnail=890x0&quality=100
- 中国大学MOOC: 如图，FB、FC、FE、AE分别属于什么线？http://edu-image.nosdn.127.net/3BFBA4C03477BD007739B3F195C45AF2.jpg?imageView&thumbnail=890x0&quality=100
- 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: 若第9题中当电路中总电压http://edu-image.nosdn.127.net/45D53DF610EBF196EBE5238589C91ABF.png?imageView&thumbnail=890x0&quality=100，http://edu-image.nosdn.127.net/8232D55E2C1346F746EFBB0780167F51.png?imageView&thumbnail=890x0&quality=100，http://edu-image.nosdn.127.net/A2CC3366BF7376F66D8EFFEB40B97149.png?imageView&thumbnail=890x0&quality=100，以下叙述正确的是
- 双跑楼梯绘制时，方向线有几根？http://edu-image.nosdn.127.net/B19D969013E163FD4C833D27FC15AF04.png?imageView&thumbnail=890x0&quality=100