按照NB T 47014，焊条J507（E5015）属于焊条的分类代号是（ ）。 A、FeT-1-1 B、Fe……

单项选择题A． B． C． D．

未分类题What does the underlined word 'they' (Line 3, ParA.3) refer to?A.Rare books.B.Library users.C.Book owners.D.Library conditions.

判断题应急处置基本操作-CRH380B型动车组停放制动切除：切除本车空气制动，如果车辆控制面板供电故障或BCU供电故障，或是列车蓄电池关闭，则需要下车将截断塞门B15置于“关断”位置。 正确 错误

未分类题Who played an important role in the early development of Luciano's business?A.His father,B.His family.C.Princess DianA.D.A photographer.

多项选择题专业监理工程师进行现场计量的依据是< )。