Why should you back up a duplicated tablespace after a TSPITR is complete?()
A. The tablespace cannot be duplicated or restored to any point in time after the duplication.
B. The tablespace cannot be duplicated or restored to the point in time before the duplication.
C. The entire database cannot be restored after a TSPITR, so a backup is required.
D. You cannot bring the tablespace online until its been backed up.
E. There is no requirement to do so, as RMAN will back up the tablespace after the TSPIT
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甲状舌管囊肿和瘘开口在()第一对鳃瘘开口在()第二对鳃瘘开口在()第三对鳃瘘开口在()
A. 外耳道
B. 盲孔
C. 扁桃体窝
D. 耳咽管
E. 舌骨下方咽部
转K3型转向架轴箱无裂纹,轴箱弹簧、轴箱纵向定位橡胶块、主磨耗块无裂损,轴箱吊杆无弯曲、裂纹,吊杆固定()
A. 螺栓无松动、折断
B. 螺栓无松动、丢失
C. 螺栓无松动、丢失不超过1条
D. 螺栓松动不超过1条、丢失
临修对心盘的要求正确的是()
A. 下心盘无变形
B. 下心盘连接螺栓、螺母丢失不超过2条
C. 心盘裂纹长度不大于2mm
D. 心盘磨耗盘上部边缘无破损窜出
Before doing maintenance on electrical equipment, you should ().
A. turn off power first
B. turn on power first
C. with a test pen in hand
D. tell C/E