举一反三
- 逻辑函数F(A,B,C)=AB+BC+AC的卡诺图为（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/7a8254757f8a4fc6ab82fa93a8e86ebf.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/229cbcade3654fb99c66a7c102ec046f.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/1c851f1288be499c92d2a7b40607bd1a.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/3b385269839a45df9645db71096c2e81.png" />
- n个变量的逻辑函数一共有最小项（ ）个。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/bc6b2e9c189248feb007810275b3ba46.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/a04259d5f82c487eb3fe219bdfe142fd.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/994cb971d6b0496e97023da8982c9ee1.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/c7dc4e3adc954375b97a1f5f805272cc.png" />
- 同或的逻辑表达式为：（ ） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/de7cc25b0fa441acbd1ae351e6b717bf.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/0521e4ead0c94f6b926ad268101e03dc.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/d7e24d5fe0914412afdc9203542a97be.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/1a45c582099646599b854ab6adc648f4.png" />
- 已知信号f(t)的波形如下图所示，则f(6-2t)的波形图为http://image.zhihuishu.com/zhs/onlineexam/ueditor/201906/414e4bc7b0b44f6e8f660e9dd1189014.bmp
- 如图所示电路，已知R1=10kΩ，R2=5kΩ，C1=0.05μF，C2=0.01μF，其输出脉冲的周期为()。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/08d078fb8fc540e784b1e1d8b3060d86.png
内容
- 0
图中尺寸标注正确的是（） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/c27b2c5bcd5248d2938ff20dcadb3848.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/283d8966e68e476a835df10a7001fa1b.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/99cfc288fcb64fd282a9ad41acac2e70.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/c8163178d3cb46f98f20b4c79e872b18.png" />
- 1
下列尺寸标注正确的是（） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/c9b1f998550f46f2954ddb9a6e931917.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/2ebdcfcbd422486e8f52decd4b1f3c91.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/713b97186b2a4602a111ab988359072b.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/d21403f12f034db3b26192a552f8f9c1.png" />
- 2
逻辑函数F (A,B,C)=Σ m (0，1，4，6)的最简与非-与非式为（ ） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/6677dfd1ca0a4255871fff8d24c1bfe1.png"/> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/5556e6fba4d849c988d994a19156d44a.png"/> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/6f296abd190d40b19f2f737f02c7adca.png"/> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/b2bf2478b09b4e6ab818d71adb4a8715.png"/>
- 3
下面的投影图中表示交错直线的是（） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/abd70ceaf2b1417f8db7dcbdafe06a4e.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/69c37bc573b34b00829846f0d05b1b8e.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/467d9b64267e4a99928004e28e8ce78f.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/ab49baad1d7f4b4bbfd286c3225870bb.png" />
- 4
已知f(t)↔F(w)，则下列说法正确的是（） A: tf(t)↔wF(w) B: F(t)↔f(w) C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/e987a05c70d3455bad2fbdef6ce1fc1d.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/92f68075a5ff43708660199e4eed9415.png" />