举一反三
- <img src="http://img1.ph.126.net/xRWXQUfZJwmSXkQiZ0l2HQ==/3826089358528721080.jpg" />? <img src="http://img2.ph.126.net/QX-jBzzFTrwpTjQkcBtfcg==/2449958197307439176.jpg" />|<img src="http://img0.ph.126.net/3XApesgU0Iga8L5Tkm0YXg==/6630324495838409649.jpg" />|<img src="http://img2.ph.126.net/sPsiWYSStdIbrCUcsMBK9A==/3114802092298176869.jpg" />|<img src="http://img1.ph.126.net/y-FdOVmaocQvOIOXtXTxEw==/662592095194801258.jpg" />
- 中国大学MOOC: 如图所示, 质量均匀分布的导线框abcd置于均匀磁场中(http://img2.ph.126.net/ZWktqafDceDxecpM_ObyaA==/6608556364631565752.png的方向竖直向上),线框可绕http://img1.ph.126.net/Fjp5Hlz_lRZx_ijt87wbRg==/6631382226024230200.png轴转动,导线通电转过http://img1.ph.126.net/gfBNNFJjL6jdtshQimeoUw==/3250473031155123904.png角后达到稳定平衡(实线位置).如果导线改用密度为原来1/2的材料做,欲保持原来的稳定平衡位置(即http://img1.ph.126.net/gfBNNFJjL6jdtshQimeoUw==/3250473031155123904.png角不变),可以采用哪一种办法?http://edu-image.nosdn.127.net/5D26D7CBB8B2617B9131535BCF06DC32.jpg?imageView&thumbnail=890x0&quality=100
- 心形线 <img src="http://img1.ph.126.net/51iXNdllu1oPmo73M33A-g==/3828059683365171853.png" /> , 其中 <img src="http://img1.ph.126.net/l1SGfBOzwcoKTuLZSsBGJQ==/2695685851975900600.png" />, 则该心形线的弧长等于 (;; )? <img src="http://img2.ph.126.net/Z2kfcGdQYGVls8Ce891a9w==/1419196832675449814.png" />|<img src="http://img2.ph.126.net/4jCSzt215P9escwFQA6wzg==/6619425037072595432.png" />|<img src="http://img1.ph.126.net/L43F-slSm-WU9DuF-i0ZXg==/3228517982971533103.png" />|<img src="http://img1.ph.126.net/J3Pcx4QQxPm779wQddVKQA==/1047649863334615897.png" />
- <img src="http://img2.ph.126.net/qowvyGJmU71A6UIpMtWkYw==/6619531689700953755.jpg" />? <img src="http://img2.ph.126.net/un3GDHXLxtcRiMEcP1z7yg==/6619072093840546265.jpg" />|<img src="http://img2.ph.126.net/IZ9fF3KQHcgJNZoygylhHQ==/6630845664350440712.jpg" />|<img src="http://img2.ph.126.net/_iw_TRTbgBcFfQ9EIzN3YA==/6619139164049839979.jpg" />|<img src="http://img2.ph.126.net/Tehi0XAX-FVa8la7PAFlnw==/2435602973495420798.jpg" />
- <img src="http://img0.ph.126.net/q6tqn77YyTg_j7CabeHYJw==/3109735542717391842.jpg" />? <img src="http://img1.ph.126.net/QO3FWMGgxAVtN31l0ulKFw==/6619487709235793443.jpg" />|<img src="http://img2.ph.126.net/-x9WCwFJKaqmfOJLJjH0_Q==/6630623563001319953.jpg" />|<img src="http://img1.ph.126.net/5eiGUQZYA2gEX9q4m57n4Q==/6608642126539334311.jpg" />|<img src="http://img1.ph.126.net/YixVkAU6iexb7xitW-q8Lg==/6630125484233816848.jpg" />
内容
- 0
<img src="http://img1.ph.126.net/JMg9tqo6gf8sEot0y9NSUg==/6619559177490984445.gif" />? 0|<img src="http://img1.ph.126.net/uSXYTJKY1--cmM46BmL7Pg==/1177972777551495010.gif" />|<img src="http://img0.ph.126.net/-vDBDVZEQJqbFun7PrX7vg==/2887370311115280318.gif" />|<img src="http://img2.ph.126.net/NK1mnxUZa_ibCGqQvHOaoQ==/2435884448470832003.gif" />
- 1
n位触发器构成的扭环形计数器,其无效状态数有( )个。? <img src="http://img1.ph.126.net/syawN86lkJeyXf8emf2enw==/6630087001327300267.png" />|<img src="http://img2.ph.126.net/0JBcfdqdyUjt5-uTh7cmUQ==/4886405595797893661.png" />|<img src="http://img2.ph.126.net/qBQGx0Z9T_pt4PZJc8Nn7g==/6608560762678510607.png" />|<img src="http://img0.ph.126.net/elyGxaiPbD815O67sULOnQ==/1876312194853825038.png" />
- 2
用相同材质、相同粗细的导线分别制成半径不同的a、b两个圆环,已知a、b两个圆环的半径之比为1:2,将圆环放在匀强磁场中,磁场与环面都垂直。当磁感应强度随时间发生变化时,a、b两环中的感应电流分别为[img=15x22]1803640ac24afe0.png[/img]和[img=14x22]1803640aca273c7.png[/img],其比值[img=15x47]1803640ad1bff20.png[/img]为
- 3
中国大学MOOC: NEMOSFET饱和区的工作条件为http://img2.ph.126.net/dJ8qGP39VGya1jZ6O7gSEQ==/2120069524684880843.png http://img1.ph.126.net/DXz3P3yAAPxMCyIGQeZ5YQ==/6608591549004212209.png,http://img1.ph.126.net/Vco_5uwMSR9d6KUF5THRjg==/3765290763558702868.png http://img2.ph.126.net/4k3r2ITby6psTeca_6LIsw==/6608212217494610744.png。
- 4
[ ]是平面简谐波波函数。 未知类型:{'options': ['[img src="http://img2.ph.126.net/wjV5ynMkHOZWU6tVOJpgWQ==/6631558147884798602.png"]', '[img src="http://img1.ph.126.net/BYK6eRy2m3CFIGn6uOyBvg==/6631603227861540016.png"]', '[img src="http://img2.ph.126.net/YpG0D7ifszUGb3ZVafQx3g==/6631454793791791103.png"]', '[img src="http://img1.ph.126.net/P6Qa6Cllm5RRaIcGlnUM_g==/6631739567303384107.png"]'], 'type': 102}