In the following statements about functional dependency, which one is incorrect?A.Ifthen X→X'.B.If X→Y andthen X→Y'.C.If X→Y andthen X'→Y.D.If X→Y and Y→Z, then X→Z.
In the following statements about functional dependency, which one is incorrect?
A.Ifthen X→X'.
B.If X→Y andthen X→Y'.
C.If X→Y andthen X'→Y.
D.If X→Y and Y→Z, then X→Z.
相关考题:
以下错误的if语句是( )。A.if(x>y)x++;B.if(x)x++;C.if(x!=y) cout<<x;y++;D.if(x<y) x++;cout<<x;else cout<<y;
下述语句中,_____中的if语句语法是错误的。()A.if(x>y);B.if(x==y)x+=y;C.if(x!=y)seanf("%d",x)else scanf("%d",y);D.if(x<y){x++;y++;}
下述语句中,______中的if 语法有错误。A.if(x==y);B.if(x==y) x+y;C.if(x!=y) scanf(“%d”,x) else scanf(“%d”,y);D.if(x==y) {x++;y++;}
以下不正确的if 语句形式是()A.if(x<y) {x++;y++;}B.if(x>yx!=y);C.if(x==y)x+=y;D.if(x!=y) scanf("%d",x) else scanf("%d",y);
以下合法的if语句形式是()。A.if (0) ;B.if (x=y) x+=10;C.if (x!=y) scanf("%d",x); else scanf("%d",y);D.if (x==y) {x++; y++;}
以下为不正确的if语句的是A.if(x<y);B.if(x!=y) printf("x=%d",x); else(x==y) printf("y=%d",y);C.if(x==y) x+=y;D.if(x<y) {x++;y++;}