【多选题】关于埋弧焊的特点,下列说法正确的是:( )
A.
生产效率高,主要由于埋弧自动焊的焊接电流较大,焊接速度较快
B.
焊接质量好,关键在于埋弧自动焊的焊剂保护效果
【单选题】根据短文回答 23~30 题。 Ford 1 Ford's great strength was the manufacturing process--not invention. Long before he started a car company, he was a worker, known for picking up pieces of metal and wire and turn...
D.
The establishment of the Company
E.
Ford's biggest contribution
【简答题】根据下列文章,请回答 23~30 题。 Ford 1 Ford’s great strength was the manufacturing process——not invention. Long before he stoned a car company,he was a worker. known for picking up pieces of metal and wire and tu...
【多选题】下列对埋弧自动焊特点的描述中正确的是( )
【单选题】有机磷酸酯类中毒症状中,不属于M样症状的是
【单选题】男,34岁,有贫血临床表现,血红蛋白65g/L,网织红细胞13%,骨髓幼稚红细胞增生活跃,Coombs实验阴性,Ham实验阴性,红细胞渗透脆性实验正常,自身溶血试验增强,加葡萄糖不能纠正,加ATP能纠正,根据上述,最可能的诊断是
【单选题】承压类特种设备受压元件中常用的焊接方法中,( )的特点是焊接过程快,生产效率高;工艺参数自动控制,操作简单,焊接质量较好。
【多选题】埋弧自动焊把电弧引燃、焊条送进和电弧移动等动作都采用机械装置自动的完成,下列选项中属于埋弧自动焊与手工电弧焊相比具有的特点的是( )
【单选题】_____ her bag, but also ______ in the leg. [ ]
A.
Did Betty not only lose; did get wounded
B.
Did Betty not only lose; got wounded
C.
Betty not only lost; got wounded
D.
Not only Betty lost; did get wounded