[主观题]Youseethelightning_________ithappens,butyouhearthethunderlater.A.)theinstantB)foraninstantC.)ontheinstantD)inaninstant
[单选题]Mary: Oh, Lucy! Something terrible happened on me. I fell off my bike and hurt my right leg.Lucy: Did you?______. How did it happen?
[单选题]Recent evidence has tended to be contrary to established theories on this subject.A.in contradiction withB.in coincidence withC.in correspondence withD.in contrast with
[单选题]For many years, people have tended to think of natural resources as stacks
[单选题]For many years, people have tended to think of natural resources as stacks
[单选题]For many years, people have tended to think of natural resources as stacks
[单选题]For many years, people have tended to think of natural resources as stacks
[单选题]For many years, people have tended to think of natural resources as stacks
[单选题]化简(A-B-C) ∪(A-B) ∩C) ∪(ANB-C) ∪(A∩B∩C) =(62)。A.A∩BB.B∩CC.AD.B
[单选题]模式R({A,B,C},{(A,C)→B,(A,B)→C,B→C})属于最高范式的是(43)。A.1NFB.2NFC.3NFD.4NF