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href="http://club.oecr.com/home.php?mod=magic&mid=showip&idtype=user&id=yylovejianshen" id="a_showip_li_814243" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/showip.small.gif" alt="" /> IP卡</a> <a href="http://club.oecr.com/home.php?mod=magic&mid=checkonline&idtype=user&id=yylovejianshen" id="a_repent_814243" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/checkonline.small.gif" alt="" /> 狗仔卡</a> </div> <div id="avatarfeed"><span id="threadsortswait"></span></div> </div> </div> <div> <div class="avatar"><a href="http://club.oecr.com/space-uid-124098.html" class="avtm" target="_blank"><img src="http://www.oecr.com/uc_server/avatar.php?uid=124098&size=middle" /></a></div> </div> </div> </td> <td class="plc"> <div class="pi"> <div id="fj" class="y"> <label class="z">电梯直达</label> <input type="text" class="px p_fre z" size="2" onkeyup="$('fj_btn').href='forum.php?mod=redirect&ptid=168726&authorid=0&postno='+this.value" onkeydown="if(event.keyCode==13) {window.location=$('fj_btn').href;return false;}" title="跳转到指定楼层" /> <a href="javascript:;" id="fj_btn" class="z" title="跳转到指定楼层"><img src="static/image/common/fj_btn.png" alt="跳转到指定楼层" class="vm" /></a> </div> <strong> <a href="http://bbs.oecr.com/thread-168726-1-1.html" id="postnum814243" onclick="setCopy(this.href, '帖子地址复制成功');return false;"> <em>1</em>楼</a> </strong> <div class="pti"> <div class="pdbt"> </div> <div class="authi"> <img class="authicn vm" id="authicon814243" src="static/image/common/online_member.gif" /> <em id="authorposton814243">发表于 2011-5-23 19:21:11</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=168726&page=1&authorid=124098" rel="nofollow">只看该作者</a> <span class="none"><img src="static/image/common/arw_r.gif" class="vm" alt="回帖奖励" /></span> <span class="pipe show">|</span><a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=168726&extra=page%3D1&ordertype=1" class="show">倒序浏览</a> <span class="pipe show">|</span><a href="javascript:;" onclick="readmode($('thread_subject').innerHTML, 814243);" class="show">阅读模式</a> </div> </div> </div><div class="pct"><style type="text/css">.pcb{margin-right:0}</style><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_814243"> 交流电的正弦电压，在负轴以下增大的时候 是属于电压减小吗？</td></tr></table> </div> <div id="comment_814243" class="cm"> <h3 class="psth xs1"><span class="icon_ring vm"></span>点评</h3> <div class="pstl xs1 cl"> <div class="psta vm"> <a href="http://club.oecr.com/space-uid-83803.html" c="1"><img src="http://www.oecr.com/uc_server/avatar.php?uid=83803&size=small" /></a> <a href="http://club.oecr.com/space-uid-83803.html" class="xi2 xw1">弥勒</a> </div> <div class="psti"> 交流电的正弦电压，在负轴以下绝对值增大的时候 其直流电位减小。比方你带100万去澳门，回来的时候欠了别人50万。欠的越多，你实际的资产就越少。 <span class="xg1"> 发表于 2011-6-17 10:47</span> </div> </div> </div> <div id="post_rate_div_814243"></div> </div> </div> </td></tr> <tr><td 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class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_825126"> 交流电压看有效值的吧</td></tr></table> </div> <div id="comment_825126" class="cm"> </div> <div id="post_rate_div_825126"></div> </div> </div> </td></tr> <tr><td class="plc plm"> </td> </tr> <tr id="_postposition825126"></tr> <tr> <td class="pls"></td> <td class="plc" style="overflow:visible;"> <div class="po hin"> <div class="pob cl"> <em> <a class="fastre" href="forum.php?mod=post&action=reply&fid=8&tid=168726&repquote=825126&extra=page%3D1&page=1" onclick="showWindow('reply', this.href)">回复</a> <a class="replyadd" href="forum.php?mod=misc&action=postreview&do=support&tid=168726&pid=825126&hash=db592db4" onclick="showWindow('login', this.href)" onmouseover="this.title = ($('review_support_825126').innerHTML ? $('review_support_825126').innerHTML : 0) + ' 人 支持'">支持 <span id="review_support_825126"></span></a> <a class="replysubtract" 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