https://www.codecademy.com/catalog/language/python
https://www.codecademy.com/catalog/language/java
https://www.codecademy.com/catalog/language/cpp
https://www.codecademy.com/catalog/language/javascript
https://www.youtube.com/watch?v=_v8eksto3ug
https://www.tutorialspoint.com/data_structures_algorithms/data_structure_overview.htm
https://www.codecademy.com/learn/learn-sql
https://www.youtube.com/watch?v=ua-cidnnj30
https://www.youtube.com/playlist?list=plf7l7kg8_fnxhattlwdceyh72qql9pvpq
https://www.youtube.com/watch?v=flzvoksckxy&list=plqvvaaa0qudf2jswnfigklibinznic4hl
https://www.youtube.com/watch?v=cce8ntxp_xi&list=pltmwhnx-gukkocxqokqjjuvxglsdywssh9
https://www.youtube.com/watch?v=u3ibvu0htns&t=587s(java)
https://www.youtube.com/watch?v=sny9rta3k_q(Java)
https://www.youtube.com/watch?v=t60ynn_zmn8(java)
https://www.youtube.com/watch?v=dlrxp4ysug4(python)
https://www.youtube.com/watch?v=wriunho_6ky(python)
https://www.youtube.com/playlist?list=pl36NENNXU148RZQ8ZWL8FHGG7EF_-5P3CQ(C ++)
https://www.youtube.com/watch?v=pzsegextgae(Python)
https://www.youtube.com/watch?v=xpmthejdyjg(java)
https://www.youtube.com/watch?v=rnvk9natbcm(javaScript)
https://www.youtube.com/watch?v=xdkv5uwek5a(代码在以太坊上您自己的加密货币)
https://www.youtube.com/watch?v=cqgtdkurzte
https://www.youtube.com/watch?v=gxpwcbcb8wc(python)
https://www.youtube.com/watch?v=fqjdxmu4zaq&list=pl1a2csdiysgpxpslgzsziwdavytax61d&index = 11&t=0S(Python)(Python)
https://www.youtube.com/watch?v=44Adnk7ggka(Java)
https://www.youtube.com/watch?v=xv2xltxnnbu&list=plsm8fkp9pppqpq4scyqpfkxxkao4r1ejpdn(java)
https://www.youtube.com/watch?v=rdxw7ps9vxc&list=plhxz9oqgmqgmqxersk8fiusiumsix0dbqskskss
https://www.youtube.com/watch?v=j3org6cbwuy&list=plqgvjc0mjmjmzwtyw3oj89tt3fhw19p8twh
https://www.youtube.com/watch?v=fyyarmqiaag&list=plf797E961509B4EB5(微积分1)
https://www.youtube.com/watch?v=h9ect6f_ftw&list=pldesaqwtn6eq2j4vgsn1hyberadeh4cw-(calculus 2)
https://www.youtube.com/watch?v=tgvnbahlapa&list=pldesaqwtn6esk16yrmzuj8f6-rnuy0ry7(计算3)
https://www.youtube.com/watch?v=ygjjywecqs8&list=plddgpdw7e6ajjacaee9awozsaoou-nix_
https://www.youtube.com/watch?v=xf-3atzfyka&list=pldesaqwtn6espahy2qukkvaxnzuqnxkyq_
https://www.youtube.com/watch?v=pticas22mtq&list=pllq_gufxankl8bjqh-hgq9u24xzp9x0dx
https://www.youtube.com/watch?v=9fthb7v14fo&list=pl5102DFDC6790F3D0
https://www.youtube.com/watch?v=yzr5qglx_9m&list=plai3U8-wik0h-1b5skihgapsh223l7xrt
https://www.youtube.com/watch?v=pzri1ifsty0&list=pl-xeha0tmq2w0vlojmjfkbtuarmhfzbqvv
https://www.youtube.com/watch?v=gp21wu6r0-o&list = plslgishe5tbm8utct1f666 omkpmjcblzkt
https://www.youtube.com/watch?v=4S3KS-ynufc&list=plbmvogvj5njt8itaur8fowbujy0vs-z3c
https://www.youtube.com/watch?v=qgizzltvxxs&list=plrmhiyyair3gngcvqQ3r1oe3gcvq Q3r1oe3azqlf8iqvg
https://www.youtube.com/watch?v=urefkmseuai&list=ple125425ec837021f
https://www.youtube.com/watch?v=nqphpiser30&list=pliy8endw5tw5tw-yjhsxapeilnjx2dkll-ox
https://www.youtube.com/watch?v=6G4O5UOH304(Python)
https://www.youtube.com/watch?v=eoyfa6myog4(JS)
https://www.youtube.com/watch?v=j3mz0brq0qe(Java)
https://www.youtube.com/watch?v=ljuf1myqaie(Java)
https://www.youtube.com/watch?v=qut1vhilmmi(python)
https://www.youtube.com/watch?v=rvmvqpsxl10(python)
https://www.youtube.com/watch?v=CNUI8OWSPPG(Python)
https://www.youtube.com/watch?v=iqfg0fadrze(Python)
https://www.youtube.com/watch?v=VOXK7KP4CRC(JAVA)
https://www.youtube.com/watch?v=0lt9w-bxkfq(python)
https://www.youtube.com/watch?v=qfxx4-9rb7u&list=pl9qxtm4nihk5-cc6egbj3gqthoa6os0nv(java)
https://www.youtube.com/watch?v=zn8djhgsi84(python)
https://www.youtube.com/watch?v=rznkvrtfkby&list=plzbbt5o_s2xrwrnxk_ycptnqqo4_u2ygl(python)
https://www.youtube.com/watch?v=of-q92cd850(r)
https://www.youtube.com/watch?v=r4-ynxw0x5w&list=plkevnnrk8rk8uvmvkrdgznk3o3O3Lxmjfraw7s
https://www.youtube.com/watch?v=5xdhnppyBv4(Python)
https://www.youtube.com/watch?v=y0vhb4yfvws(java)