执行以下命令安装face_recognition：pip3 install face_recognition出现错误：Collecting face_recognition
Using cached https://files.pythonhosted.org/packages/1e/95/f6c9330f54ab07bfa032bf3715c12455a381083125d8880c43cbe76bb3d0/face_
安装cmake:pip3 install cmake错误:Collecting cmake
Downloading https://files.pythonhosted.org/packages/a5/7c/6525cadf99abbabbcb29676f53de0441e8d2f8d0114ab52aae2b31223a3b/cmake-3.16.3.tar.gz
Complet
本来想在ubuntu下安装个pip3，发现没有这个包：$ pip3
Command 'pip3' not found, but can be installed with:
sudo apt install python3-pip
$ sudo apt-get install python3-pip
Reading
备份/etc/apt/sources.list替换/etc/apt/sources.list内容如下（以下中阿里云的）：deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main
源码：package test;
public class test {
public static void main(String[] args) {
String text = "这是<code>Java</code>代码测试<code>hello.</code>！&quo
安装Drupal 8.8.4时提示以下错误:Requirements review
Warnings found
PHP OPCODE CACHING
Not enabled
PHP OPcode caching can improve your site's performance considerably. It is
Microsoft Edge默认是没有“加载扩展”这个选项，需要先打开：1. 打开开发者人员扩展功能：在地址栏输入 about:flags 然后回车，勾选“启用开发者人员扩展功能”；2. 加载扩展：在菜单中找到“扩展”，单击打开，再找到“加载扩展”，再单击选择需要加载的插件就可以了；
