HR 测试

空HR

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border:solid 1px red;

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height:0px; border-top:dotted 1px red;

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height:0px; border-top:dashed 1px red;

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height:1px;

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height:0px;

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height:0px; border:solid 10px red;

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height:0px; border-top:solid 10px red;

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height:20px;

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height:20px; border:solid 1px red;

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height:1px; border-top:solid 1px red; border-bottom:solid 3px blue;

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