<samp id="4k0g2"><pre id="4k0g2"></pre></samp>

<ul id="4k0g2"></ul>

<samp id="4k0g2"><tbody id="4k0g2"></tbody></samp>

<samp id="4k0g2"></samp>

<th id="4k0g2"><nav id="4k0g2"></nav></th>

<th id="4k0g2"></th>

<strike id="4k0g2"></strike>

<ul id="4k0g2"><pre id="4k0g2"></pre></ul><strike id="4k0g2"></strike>

判斷題

動滑輪的作用是使?fàn)恳蛱嵘ぷ魇×Α?/h4>

答案：正確

你可能感興趣的試題

采用自動重合閘有利于電力系統(tǒng)的動態(tài)穩(wěn)定。

答案：正確

正常情況下，將電氣設(shè)備不帶電的金屬外殼或構(gòu)架與大地相接，稱為保護(hù)接地。

答案：正確

<samp id="y0uq2"><tbody id="y0uq2"></tbody></samp>

<samp id="y0uq2"><pre id="y0uq2"></pre></samp>

<samp id="y0uq2"><pre id="y0uq2"></pre></samp>