单项选择题

Let R and S be the following relations：

A．3
B．4
C．5
D．6
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单项选择题
Consider a relation R ( A，B，C，D ) with the following dependencies： AB C, CD E, DE B.
A．AB
B．ABC
C．ABD
D．ABE
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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