<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>id选择器</title> <style type="text/css"> #dcs{ color: red; } </style> </head> <body> <p id="dcs">深圳市多测师信息技术有限公司</p> <p id="jj">宝安班</p> </body> </html>