设图1-69所示电路均为CMOS门电路，实现功能的电路是（）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/71489f6c803e4126a4dd81ca92e3c47b.png

2021-04-14

答案：

BD

0
图示电路中的电压 U x 为（）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/3da6f4a95b254ee9a794c0a6d2b27e36.png
1
请判断图 4 所示的电路中，引入反馈的类型（）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/108f06edb4104c918c4a225c348ed9e7.png
2
图所示电路中，网孔方程为则R21=（）Ω。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/1dc683a3c9e34636b3a2bb2f2004d31b.png
3
对称三相电路的有功功率的计算公式正确的是( )。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/3306ee5c6c384986b082f95c444c3e4d.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/d59fad97c5ea4de786230488e1333ec7.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/480713659b00439c983040f4d91364e9.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/c475fb2fc3494891960d403d1e6b92d0.png" />
4
拉普拉斯（Laplace）方程的表达式为（）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/26731bcad75f41389448b29292940653.jpg" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/40e7e55a72ee44f59b45d20c84ebe3a6.jpg" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/c65a79ea4d754174b99f34020d6e1735.jpg" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/139e8d3dc37941549e7b6b1731243172.jpg" />

设图1-69所示电路均为CMOS门电路，实现功能的电路是（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/71489f6c803e4126a4dd81ca92e3c47b.png