<h1 id="titleH1" style="margin: 0px; padding: 10px 0px 0px; font-size: 16px; width: 590px; line-height: 32px; font-weight: inherit; color: rgb(51, 51, 51); font-family: 微软雅黑, &quot;microsoft yahei&quot;, Arial, Helvetica, sans-serif; white-space: normal;">干燥的电工纸板的介电系数为（)。</h1><div class="clear" style="margin: 0px; padding: 0px; clear: both; color: rgb(102, 102, 102); font-family: 微软雅黑, &quot;microsoft yahei&quot;, Arial, Helvetica, sans-serif; font-size: 14px; white-space: normal;"></div><div class="s_mess2" id="LiteContextdiv" style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑, &quot;microsoft yahei&quot;, Arial, Helvetica, sans-serif; font-size: 14px; white-space: normal;"><div class="s_mess2_m" style="margin: 0px; padding: 10px 0px 0px; width: 590px; line-height: 30px; overflow: hidden;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px;">A、1.1～1.9;</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px;">B、2.5～4.0;</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px;">C、4.0～5.0;</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px;">D、5.0～6.0。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px;">请帮忙给出正确答案和分析，谢谢！</p></div></div><p><br/></p>