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改变主题,夜晚/白天
<!DOCTYPE html> <html> <head> <style> p.one { border-style: solid; border-width: 5px; } p.two { border-style: solid; border-width: medium; } p.three { border-style: solid; border-width: 1px; } </style> </head> <body> <p class="one">Write your text here.</p> <p class="two">Write your text here.</p> <p class="three">Write your text here.</p> </body> </html>