摘要：
<!DOCTYPE html><html> <head> <meta charset="utf-8" /> <title></title> <style type="text/css"> .box{ width: 350px; height: 250px; /*border: black soild 阅读全文
摘要：
<!DOCTYPE html><html> <head> <meta charset="utf-8" /> <title></title> <style type="text/css"> *{ margin: 0; padding: 0; } ul{ list-style: none; } .box 阅读全文