【简答题】Look at the picture, the electrode, the arc and the weld pool are sorrounded by the shielding gas. They have no chance to contact with air before the molten metal cools down and solidifies. That`s to ...
【判断题】The welding consumables include filler metal, flux, backing material, shielding gas etc.
【单选题】对《将进酒》一诗分析有误的一项是( )
A.
这是首劝酒歌,诗人借题发挥,尽吐郁积在胸中的不平之气,也表达了施展抱负的愿望。
B.
这首诗的感情基调,愤激之情是占主导地位的。豪放只是它的外壳,而内核则是愤激。
C.
这首诗中,诗人感情的发展变化极快。开头四句写悲,“人生”以下六句写欢。“钟鼓”以下六句写愤激之情。“主人”句至结尾写狂放之情。
D.
诗的开头两联用的是古代民歌中赋的手法,渲染了一种阔大的境界,读来很有声势,又富有慷慨悲壮的韵味。
【单选题】A suitable shielding gas may isolate the following except ________ from air.
【简答题】A.Avoiding B.Fending C.Escaping D.Shielding
【简答题】What should be specified about shielding gas in the WPS?
【简答题】A. Avoiding B. Fending C. Escaping D. Shielding