证券是用来证明证券发行人有权获得相应权益的凭证。 ( )
参考答案:错
I think Class One ________to win because Class One ______ all football lovers. [ ]
A. is likely; are
B. are likely; are
C. is likely; is
D. are likely; is
原型定义的属性中,确保需求没有逻辑上的矛盾是下列哪种属性
A.一致性
B.完备性
C.可维护性
D.非冗余性