????：<div class='box1'></div><div class='box2'></div><div class='box3'></div><div class='box4'></div><script>//用jQuery實(shí)

<div class='box1'>

</div>

<div class='box2'>

</div>

<div class='box3'>

</div>

<div class='box4'>

</div>

<script>

//用jQuery實(shí)現(xiàn)這種功能

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

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

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

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

</script>

?? ???：查無此人?? ??：2019-06-11 09:12:20
???? ??：完成的不錯(cuò)。每行js和jq語句結(jié)束增加;號。繼續(xù)加油