【简答题】A.I was a salesclerk. B.Thanks a lot. C.I lost my job last week. D.I'd like to be an editor ff possible.
【单选题】Only when I lost the opportunity to take my first job ____ how important it was to me. A. I real
A.
25. Only when I lost the opportunity to take my first job ____ how important it was to me. A. I realized
B.
I had realized C, had I realized D . did I realize
【简答题】二氢吡啶类药物硝苯地平遇光极不稳定,可能产生的光化产物 ( )
【单选题】当船舶发生保安事件或保安状况受到威胁或破坏时,除____外,禁止其他人员上船。
【单选题】解决农作物大面积杂交制种时母本去雄技术问题的最理想方法是( )。
【简答题】UNIQUE 约束的作用是( ), DEFAULT 约束的作用是( ), CHECK 约束的作用是( )。
【判断题】二氢吡啶类药物遇光极不稳定,易发生光化学歧化作用,故此类药物分析时需要遮光操作。()