B.) occasion
C.) case
D.) situation
[单选题]A. caseB. shortC. turnD. essence
[单选题][A] case [B] example [C] lesson [D] suggestion
[单选题]A.) in caseB.) rather thanC.) as well asD.) as though
[试题]circumstance
[单选题]7.— ________ .is your pencil case?—It’s blue and white.A. HowB. What colorC.WhatD. When
[单选题]在关系模式S(A,B,C,D)中,F={A→(B,C,D),C→D},则R最高达到______。A.) 1NFB.) 2NFC.) 3NFD.) BCNFA.B.C.D.
[单选题][A]figures [B]exhibits [C]convinces [D]speculates
[单选题]A. binding B convincing C restraining D sustaining
[单选题]有关系R(A, B, C,D)和关系S(A, B, C, D, E, F),关系T是及与S的笛卡尔积,即: T=R×S。则关系T的属性个数是______。A.4B.6C.10D.24
[单选题]有关系R(A,B,C,D) 和关系S(A,B,C,D,E,F),关系T是R与S的笛卡尔积,即T=R×S。则关系T的属性个数是( )。A.4B.6C.10D.24