若有以下说明和语句：sturct st { int n;char *ch;}; struct st a[3]={5, "abc",7, "def",9, "ghk" /> <div class="width960"> <div id="div_lit_topnav_960_90"> <div class="h15"> </div> <script type="text/javascript"> /*Ask_960-90_通栏*/ var