GIT: 撤销修改

创建版本库: git-init

git-push

git-push-by-friend

git-clone

git-no-ff

git-status

git-rebase

git-rm-tag

git-add-commit

git-pull-merge-push

git-remote-add

git-merge-conflict

编写第一个Python程序

用Visual Studio Code搭建Node.js开发环境

SQL: read uncommitted

install-py

Python定义函数并调用

Python控制的小车