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【单选题】
系模型中,实现不同关系之间的联系是通过( )。A.
关系
B.
外键
C.
表
D.
候选码
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参考解析：
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皮皮学刷刷变学霸
举一反三
【简答题】越来越多的酒店在国际空港设置 ,使店外迎接服务更具专业化。
【单选题】She managed to save _____ she could out of her wages to help her brother.
A.
how little money
B.
so little money
C.
such little money
D.
what little money
【简答题】A.She hired a detective to help her. B.She finished writing only half of her story. C.She wants to put her book away. D.She s reading something interesting.
【单选题】Busy as she was, she made ______ her duty to help her old neighbors.
A.
this
B.
that
C.
one
D.
it
【简答题】We should help her when she is____________
【单选题】She ________ when she received her medical report.
A.
could help but to cry
B.
couldn’t help but crying
C.
couldn’t help crying
D.
couldn’t help to cry
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