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同上一堂课0323四年级[语文]纳米技术就在我们身边
同上一堂课0323四年级[语文]纳米技术就在我们身边
同上一堂课【四年级】25/67
![同上一堂课0320四年级[英语]Unit 2 Lesson 3-4](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/dfabee8f34ec4a4389448a279f4ae03c~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=ck7%2BNHzfOKSRgHgEy%2BWQAycet20%3D)
App29:44![同上一堂课0323四年级[语文]纳米技术就在我们身边](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/a9d26f3bf5c3496faff44d01996eda98~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=CCYHCHsYoId3ozxq%2FRlQbpZVFEM%3D)
App29:46![同上一堂课0324四年级[数学]小数点搬家](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/bc6431f0ae394c7c936cad2cb17a7fb9~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=Ljpt%2Bo3Pe6zuf442bhsfPd4vQb8%3D)
App29:47![同上一堂课0325四年级[科学]生活中的静电](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/f10e730990b74c94af7a0240c2eb02e5~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=Oqn9cXZpUnJHp7CXHveSVXrVS1o%3D)
App29:46![同上一堂课0326四年级[英语]Unit 2 Lesson 5-6](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/5d1c1fba3c014d378f009a2029f87b97~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=dt1IhNRzx%2FGn%2BmKp%2BSWjoas%2F88s%3D)
App29:46![同上一堂课0327四年级[数学]街心广场-包装](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/d1ede1fb7f29450dbe8adb9db6db6edd~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=%2BuE5dZsqxvkTW9e9QY69V0MlcYc%3D)
App29:45![同上一堂课0330四年级[数学]蚕丝-手拉手](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/2a99d57d18c84882ab81f10cee41c880~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=ocROv3WNghMMlhAdz2O%2BiMsBfj0%3D)
App29:40![同上一堂课0331四年级[英语]Unit3 Lesson1-2](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/45175a3ffaf7469986da7d0f7197d6e0~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=VpSdinPmk74gjWcX9hT0vp0tz8o%3D)
App27:29![同上一堂课0401四年级[语文]千年梦圆在今朝-习作](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/33ccc02e29854edfb648e2cfce6a8595~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=EvuT8uz9TkTG8KMQHnwtqn44SD0%3D)
App29:01![同上一堂课0402四年级[美术]北京的城楼](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/3ef42d130a7840feaa467345fd85137b~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=DEb2UzUkShqO6yDTkP4fZCYiles%3D)
App27:05![同上一堂课0403四年级[语文]快乐读书吧](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/1b5960b88bf840e186fa317e2169f4f4~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=KYf8OWhkuvSDevFxiEy3EeoFs2A%3D)
App29:19![同上一堂课0407四年级[语文]短诗三首-绿](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/a204624a22a640e097195f7386f1621a~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=QESUxpm6LE7YSjSvFoGBOoL%2BRmU%3D)
App29:44![同上一堂课0408四年级[英语]Unit 3 Lesson 3-4](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/d27351bca1244885893b2f0cfe852227~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=sp9nrzKhWRzoPyN97OI0oAIkaYk%3D)
App29:43![同上一堂课0409四年级[实践]十岁天空](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/39cd827c508440ec98f8a43882f6f5e1~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=80M%2B4uPT%2FWqImjpACNXEpo7%2FgwM%3D)
App29:45![同上一堂课0410四年级[语文]白桦-在天晴了的时候](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/fe3a25f1b245400da6c99800325385ae~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=u9hKXQyDCibwjWv%2FAuI3kP77MHY%3D)
App29:44![同上一堂课0413四年级[数学]练习三-看一看](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/8e444cccac7a4229bdedbfd76735f096~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=jh9hVDBIfBCwq11EFN%2FNSJNXQYo%3D)
App29:46![同上一堂课0414四年级[英语]Unit 4 Lesson 1-2](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/84c2aa10504c48c99c67babf8915f473~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=uCpatvse2czILv%2FgfH0ov%2FT304E%3D)
App29:46![同上一堂课0415四年级[语文]猫](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/225de9c8094f401396fb460ffb400868~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=w%2FM0MGpDaSDGWVC96bePiWc%2BDAI%3D)
App29:46![同上一堂课0416四年级[数学]我说你搭-搭一搭](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/cc8a88b4c3ca464bb9536759cb54813f~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=%2BoF%2F9VqPl4Rl38FG0sXFoj%2FpbKo%3D)
App29:45![同上一堂课0417四年级[语文]母鸡](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/81717dcd1b1349429e973fc3b1b9106d~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=5H6C0BegPt2nvUBDcsEjk2PX5N8%3D)
App29:45![同上一堂课0420四年级[数学]字母表示数](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/c93bce0e9b95416798a914f149950999~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=bymujTqmWdfa0U%2FMexjGVvjWUHo%3D)
App29:06![同上一堂课0421四年级[音乐]我是少年阿凡提-牧羊姑娘](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/ddf67efa6fd443159e11d372191bd1dd~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=ayKV9iFyH5YjbwK%2BJ%2BXB6FChiP0%3D)
App29:35![同上一堂课0422四年级[语文]白鹅](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/805243cdf5b04143bb0152929198874f~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=CKaYSNpjYjGvMOXfaKaAf5AshXA%3D)
App29:02![同上一堂课0423四年级[英语]Unit 4 Lesson 3-4](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/cad6181efed747468d932f0f03103938~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=nbzl05InfH9pd3Umhx6KnaiyjJw%3D)
App28:38![同上一堂课0424四年级[语文]习作](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/d13e9efb727a4c198f6445cc7ad08645~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=r7xzTs8ZnWFjXiYD%2FT8T3rtcKbw%3D)
App28:54![同上一堂课0426四年级[数学]等量关系-方程](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/bd2c62dd4a3e40ceb3a69a302a8f4f18~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=pS2Mi1rOLLMxdHm05gtExLlMoX0%3D)
App29:05![同上一堂课0427四年级[语文]海上日出](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/3f0e47d8216d4d3d82f440bb12d5739b~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=cq%2F0e0l7x66gTtd%2BIFz%2F0bb6pAY%3D)
App29:59![同上一堂课0428四年级[英语]Unit 5 Lesson 1-2](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/cb9cd539d3424ca189219c108ca21764~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=wohjkFKggRdK8YCbkeAyuC21T8U%3D)
App29:59![同上一堂课0429四年级[语文]记金华的双龙洞](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/eb7dc655bbfa4eb186c836473006f742~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=ozy75Oyx%2FPkQU6u51Tj1CXclsIg%3D)
App29:59![同上一堂课0430四年级[数学]解方程](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/84d90cd1a7504b63b4460e4c83d4c5ef~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=R%2Be3FyDvqVrEpN9vSIW8YCDRZHM%3D)
App29:58![同上一堂课0506四年级[数学]猜数游戏-奥运中的数学](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/820ad8583c164029a17a948e48858f65~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20241115045018464B80AB8835BB30E14B&requestFrom=704&version_code=80402&x-expires=1763153418&x-signature=SLbN0GVWui4jDkSuqhRzW3yOmY4%3D)
App29:36打开App观看
