【简答题】数据完整性主要包括:实体完整性、()和用户自定义完整性
【单选题】在下列栲胶中,我国工业上用于生产气体脱硫剂是 ______________ 。
【单选题】现代汉语普通话的规范标准是哪一年确定的?( )
【简答题】A failed marriage means there are others just like you needing to be ______ (love).
【单选题】(2013·南京金陵中学模拟)I failed again,but my parents encouraged me and told me that failure________the mother of success.
【单选题】_________ to me, John would not have failed.
A.
If he has listened to me
D.
Should he have listened
【判断题】He live in Shanghai.
【判断题】空间的尺度是人通过知觉尺度与人体尺度对照实现。