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【单选题】
设学生关系S(SNO,SNAME,SSEX,SAGE,SDEPT)的主键为SNO,学生选课关系SC(SNO,CNO,SCORE)的主键为SNO和CNO,关系R(SNO,CNO,SSEX,SAGE,SDEPT,SCORE)的主键为SNO和CNO,关系R满足( )A.
1NF
B.
2NF
C.
3NF
D.
都不对
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举一反三
【单选题】______ weather we are having these days!
A.
What a bad
B.
How nice a
C.
How nice
D.
What bad
【单选题】下列哪项是一般生产制造企业现金流入的主要来源（）？
A.
收回投资收到的现金
B.
处置固定资产、无形资产和其他长期资产所收回的现金
C.
销售商品、提供劳务收到的现金
D.
取得 借款收到的现金
【单选题】The airport has been closed due to bad weather. ( ), we are informed that the flight has been canceled.
A.
For circumstance
B.
For safety reasons
C.
For good day
D.
For help
【单选题】We are going to ___ the game to next week because of the bad weather.
A.
associate
B.
postpone
C.
anticipate
D.
distribute
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