依次执行如下三条命令即可换源:
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak sudo sed -i 's/archive.ubuntu.com/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list sudo sed -i 's/security.ubuntu.com/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list
a772304419 ©著作权
依次执行如下三条命令即可换源:
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak sudo sed -i 's/archive.ubuntu.com/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list sudo sed -i 's/security.ubuntu.com/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list
目录实现功能开发环境代码实现导入包窗体界面(DrawUI)监听器实现监听器功能(DrawMouse)addActionListener监听器 1. 曲线  
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