0,2/3,0,2/5,0,( )
A.0
B.2/7
C.2/9
D.1/3
参考答案:B
— Excuse me, can I turn right here?
— No, you can't. Please look at the sign _____. [ ]
A. B. C.
软件可维护性度量的七个质量特性是可理解性、可测试性、可修改性、可靠性、 ______、可使用性和效率。