请问老师们，这里调用了第2个栏目的内容，第2个栏目下有3-4-5-6-7栏目，我想只调用3、5、7，应该怎么写呢
{eyou:channelartlist typeid='2'}
<div class="section3 container">
<div class="imgbg"><em class="letter">{eyou:field name='lmjc' /}</em><span class="letter1">{eyou:field name='typename' /}</span><img class="letterq1" src="{eyou:global name='web_templets_pc' /}/skin/img/q1.png"><img class="letterq2" src="{eyou:global name='web_templets_pc' /}/skin/img/q1.png"><img class="letterq3" src="{eyou:global name='web_templets_pc' /}/skin/img/q1.png"></div>
<div class="wrapsec3c " >
<div class="swiper-container section3-container">
<div class="swiper-wrapper"> {eyou:arclist flag='c' orderby='now'}
<div class="swiper-slide"><a href="{$field.arcurl}"><img src="{$field.litpic}" style=" border-radius:25px;">
<div class="info">{$field.title}</div>
</a></div>
{/eyou:arclist} </div>
</div>