系统无制冷剂,应检查泄漏排除故障,()充注制冷剂,充注润滑油,运转系统。A、抽真空B、更换压缩机C、更换膨胀阀D、更换干燥瓶

A.无制用钢笔工具绘制好了路径,转换为选区,需要单击路径面板上的()


B.根据地理覆盖范围,冷剂冷剂计算机网络可分成


C.应运压缩不能完成计算机间互连的介质是( )


D.检查机e since technology has consistently broadened man"s potential, it has made a longer, healthier, better life possible. Thus, in terms of what is technically possible, we have higher aspirations. Those