【单选题】The staff have been informed that under no circumstances______the telephone in the office for personal calls.
【单选题】焊缝布置的原则
B.
焊缝布置应尽量对称,尽量避开最大应力和应力集中部位
C.
焊缝布置应避开机械加工表面,尽量减少焊缝数量及长度、缩小不必要的焊缝截面尺寸。
【单选题】There must have been someone who had informed the owner of the bathing center of the sudden crack-down or he______able to escape the sweep.
【多选题】按焊缝在空间位置的不同,焊缝可以分为平焊、横焊、立焊和仰焊四种类型。对于焊缝位置的布置,下列描述正确的是( )
【单选题】Applicants for this company have to be informed of the demands peculiar to the job.
【单选题】They______informed, or they would get here on time.
【多选题】焊接残余应力会影响焊接构件的使用性能,因此必须加以防止和消除,可通过( )。