摘要：
<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title></title> <style> label{display: block; margin: 20px;} #box{width: 260px; overflow: hidden;m 阅读全文
摘要：
<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title></title> <style> label{display: block;margin: 20px;} #box{width: 260px; height: 50px; borde 阅读全文