css内部由内到外分别是元素、内边距、边框、外边距。对于内边距（padding）,1个属性值是设置4个方位；2个属性值是设置上下、左右；3个属性值是设置上、左右、下；4个属性值分别代表的方位是上、下、...
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<!DOCTYPE html><html><head> <meta charset="UTF-8"> <t...
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主要难点在于if……else判断语句的理解与运用
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<!DOCTYPE html> <html> <head>...
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先用HTML布局再用css写出样式
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<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title>...
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<!DOCTYPE html><html><head> <meta charset="UTF-8"> <t...
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<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <...
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<html><head> <meta charset="utf-8"> <title>test</title> <...
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<!DOCTYPE html><html><head> <meta charset=utf-8" /> ...
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<!DOCTYPE html><html><head><meta charset="UTF-8"><title>灵犀科技...
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通过给input标签设置for循环+if……else判断语句实现多选功能
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效果图html代码<div class="box"> <img src="image/font.png"> ...
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<!DOCTYPE html> <html> <head> <title>浮动作业</title> <meta ...
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<!DOCTYPE html> <html> <head>...
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