【简答题】为了控制气动回路中的气体流量,在每一个气缸的气管连接处都设有 ,以调节机械手各个方向的 。
【简答题】某型硅整流二极管的型号为ZP100-8F,指的是其额定电压为()。
【简答题】硅二极管的型号为ZP100—8F,指的是其额定电流为100A,额定电压800V,正向平均电压(),()的硅整流二极管。
【单选题】Sentences 4 and 6 are ________ (examples/reasons/facts)
【简答题】阅读下面短文,并借助上下文和插图补充所缺信息。每个空只能填写一个形式正确、意义相符的单词。 One day my uncle was (1)______ a newspaper and learned that (2)______ were our friends. We should get (3)______ well with them. He looked at his nice bi...
【简答题】阅读理解。 Raising pets is a popular online among agers. 'More than 20 of my classmates have adopted(领养) pets online.' Said Wang Hui from Beijing. If you go to some websites, you can adopt virtual...
【单选题】My uncle learned to play the guitar by ______ three years ago.