即热式电热水器那种发热管的好?
<div class="wgt-best " id="best-answer-1472794040" style="background-image: initial; background-position: 0px 0px; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: " pingfang="" sc",="" "lantinghei="" "microsoft="" yahei",="" arial,="" 宋体,="" sans-serif,="" tahoma;="" padding:="" 0px="" 28px;="" zoom:="" 1;="" color:="" rgb(51,="" 51,="" 51);="" font-size:="" 14px;"="">