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【单选题】
下述哪一个SQL语句用于实现数据存取的安全机制?A.
COMMIT
B.
ROLLBACK
C.
GRANT
D.
CREATETABLE
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【单选题】Many people like white as a color as it is a _____ of purity.
A.
symbol
B.
sign
C.
signal
D.
symptom
【判断题】As white is a symbol of celebration and rich, the western bride’s wedding dress is generally white.
A.
正确
B.
错误
【简答题】The main color of western wedding is white, which is a symbol of_______________.
【简答题】In many cultures white is often associated with something positive. A white collar job, for instance, is the kind of job many people look for, working with your brain and not your hands. White has a c...
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