影响个体活动效率的主观因素主要是个体的能力与动机，但动机因素比能力因素（）
A. 次要
B. 更次要
C. 更重要
D. 更无足轻重
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胚是种子最主要的部分，由受精卵发育而成的幼小植物体。一般可分为（）四部分。
You execute the following RMAN command in the order shown below： BACKUP VALIDATE DATABASE； BLOCKRECOVER CORRUPTION LIST； What will these commands do？（）
A. Create a backup of the database and recover all corrupted blocks found in the backup.
B. Run a backup validation and list all the logically corrupt blocks as well as physically corrupt blocks in the database.
C. Run a backup validation to populate V$COPY_CORRUPTION view， and then list any corrupt blocks recorded in the view.
D. Run a backup validation to populate V$DATABASE_BLOCK_CORRUPTION view， and then repair any corrupt blocks recorded in the view.
E. Run a backup validation， repair any corrupt blocks found during the validation process， and then update V$DATABASE_BLOCK_CORRUPTION view to indicate which corrupt blocks have been repaired.
战国时期是我国历史上的大变革时代，各诸侯国纷纷变法。其变法的直接目的是（）
A. 促进生产力发展
B. 实现富国强兵
C. 缓和社会矛盾
D. 增强东周王室实力
每个班次应至少一次用（）台仪表测量油管道附近热力管道表面温度不高于（）℃。
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