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【单选题】
下列SQL语句中,能够实现参照完整性控制的语句是:( )。A.
Foreign Key
B.
Primary Key
C.
References
D.
Foreignkey和references
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举一反三
【单选题】Mary is the only one of the teachers who ________ a little Chinese because she is one of my friends who ________ been to China.
A.
know；have
B.
knows；has
C.
knows；have
D.
know；has
【单选题】根据成就领导的素质论者约翰·麦克斯弗尔的观点，以下哪类人成为领导的几率最大()
A.
缺少做某项特定工作的能力或天赋
B.
具有领导者的天资与才能，但缺乏自律
C.
具有朴素的天赋但缺少展现其才能的机会
D.
唯一缺乏的就是机会，但能自己选择或创造机会
【简答题】Then my friends went to a house where the sign said 'NO VACANCIES', because they thought this meant the people who owned the house were not away on holiday. (Passage 1)
【单选题】I hope my parents ______ the Mid-autumn Party in our school. Because I will dance with my friends ______ it. [ ]
A.
to come to, on
B.
to hold, at
C.
can come to, at
D.
to come to, at
【单选题】I like the Internet because I can____my friends and make a lot of new friends online. [ ]
A.
sing with
B.
go with
C.
chat with
D.
argue with
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