<li id="jepnc"><form id="jepnc"><xmp id="jepnc"></xmp></form></li>

<dd id="jepnc"><delect id="jepnc"><sup id="jepnc"></sup></delect></dd>

<samp id="jepnc"><label id="jepnc"><legend id="jepnc"></legend></label></samp>

<dfn id="jepnc"><dl id="jepnc"></dl></dfn>

判斷題

循環(huán)水中加氯的作用是防腐。

答案：錯(cuò)誤

你可能感興趣的試題

離心泵的出口閥是用于調(diào)節(jié)水泵的流量和揚(yáng)程。

答案：正確

加填料時(shí)將幾根填料的頭放在一起，不要相互錯(cuò)開(kāi)。

答案：錯(cuò)誤

<thead id="wcisn"><meter id="wcisn"></meter></thead>

<dfn id="wcisn"><label id="wcisn"><legend id="wcisn"></legend></label></dfn>

<dfn id="wcisn"><input id="wcisn"><strong id="wcisn"></strong></input></dfn><form id="wcisn"><delect id="wcisn"><dfn id="wcisn"></dfn></delect></form>

<menuitem id="wcisn"></menuitem>

<menuitem id="wcisn"></menuitem>