1,0,1,1,2,3,5,( )
A.7
B.8
C.9
D.10
参考答案:B
I like traveling by sea it is not rough.
A.unless
B.in case
C.as long as
D.although
关系表中的每一行称为一个( )。
A.元组
B.字段
C.属性
D.码