2019-06-01课后作业

HTML

</p> <p> 20190531作业</p> <p>

CSS

.bth:link{

display: block;

width:42px;

height: 30px;

background-image: url(img/4.png);

background-repeat:no-repeat;

background-position:-8px -338px;

}

.bth:hover{

background-position:-59px -338px;

}

.bth:active{

background-position:-127px -338px;

}

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