单项选择题

设有关系R(CITY,ST,ZIP),其函数依赖集F={(CITY,ST)ZIP,ZIPCITY},则关系R至多满足()。

A.1NF
B.2NF
C.3NF
D.BCNF

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单项选择题
符合IEEE802.3标准的Ethernet网物理地址采用连续编码方法,它使用的地址长度为()。

A.8bit
B.16bit
C.48bit
D.64bit

单项选择题
White box testing of software testing is a test for software structure. Which of the following item should not be included in the content of white box ?()

A.boundary value analysis
B.statement testing
C.branch testing
D.path testing

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