【单选题】电动机在工频下运行,一般采用( ) 进行过载保护, 在变频控制时不需要
【单选题】The writer's attitude toward email can best be described as ______.
【判断题】卧室植物的选用以小型、淡绿色为佳。( )
【单选题】电动机在工频下运行,一般采用( )进行过载保护,在变频控制时不需要。
【单选题】Generally speaking, the______indicates that what is said is a matter-of-fact statement.
【单选题】变频器在工频下运行,一般采用( )进行过载保护。
【单选题】I promise to look ______ the matter as soon as I get back to the head office.
【单选题】You should look _______ into the matter to get more information about it.