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<!DOCTYPE html>
<html> <head> <style> @(1) {@(6): @(3) solid @(6);} </style> </head> <body> <p>This is a paragraph.</p> <p>This is a paragraph.</p> <p>This is a paragraph.</p> </body> </html>
<!DOCTYPE html>
<html> <head> <style> p {border: 1px solid yellow;} </style> </head> <body> <p>This is a paragraph.</p> <p>This is a paragraph.</p> <p>This is a paragraph.</p> </body> </html> 不正确
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