设有关系模式W(C,P,S,G,T,R),其中各属性的含义是:C为课程,P为教师,S为学生,G为成绩,T为时间,R为教室,根据定义有如下函数依赖集: F = {C → G , (S , C) → G , (T , R) → C , (T , P) → R , (T , S) → R} 若将关系模式 W 分解为 3 个关系模式 W1(C , P) , W2(S , C , G) , W3(S , T , R , C) ,则 W1 的规范化程度最高达到
【简答题】n.1 [sing., U] the chance to experience new ideas, ways of life, etc. 接触;体验.2 [U] when sb. is in a situation where they are not protected from sth. erous or unpleasant 暴露
【简答题】e____ n. 1[sing.,U] thechance to experience new ideas, ways of life, etc. 接触;体验 2[U] when sb. is in asituation where they are not protected from sth. erous or unpleasant 暴露