問題詳情

(三) The M:N relationship between STUDENT and CLASS must be divided intotwo 1:M relationships through the use of the ENROLL entity; the ENROLLentity is________ . 
(A)weak
(B)strong
(C)optional
(D)mandatory

參考答案

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增