abstract：<div class='box1'></div><div class='box2'></div><div class='box3'></div><div class='box4'></div><script>//用jQuery實

<div class='box1'>

</div>

<div class='box2'>

</div>

<div class='box3'>

</div>

<div class='box4'>

</div>

<script>

//用jQuery實現(xiàn)這種功能

$('.box').background='red';

$('.box').background='black'

$('.box').background='pink'

$('.box').background='yello'

</script>

Correcting teacher：查無此人Correction time：2019-06-11 09:12:20
Teacher's summary：完成的不錯。每行js和jq語句結(jié)束增加;號。繼續(xù)加油