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【单选题】
Suppose we have the relation schema R( A, B, C, D)with functional dependencies; F{A→B,B→C,C→D,D→A}, then R(A,B,C,D. at least is in(73).A.
1NF
B.
2NF
C.
3NF
D.
BCNFThe construct eobegin Statement1; Statement2; coend means Statement1 and Statement2 are to be executed in parallel. The only two atomic actions in this construct are loading the value of a variable and storing into a variable. For the p
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【单选题】It was raining heavily.Little Mary felt cold,so she stood__to her mother.
A.
close
B.
closely
C.
closed
D.
closing
【单选题】_____ preparing dinner , she stood at the front door waiting for her children to return
A.
To finish
B.
Having finished
C.
Having been finished
D.
Finished
【简答题】把u1 u2 添加到g2组
【单选题】I'm going anyway; ____________she will go is up to her to decide.
A.
A. if or not
B.
that if
C.
that
D.
Whether or not
【多选题】栓剂中的添加剂主要有( )。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
硬化剂
B.
吸收促进剂
C.
增稠剂 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
D.
D 乳化剂
E.
防腐剂 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
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