Software quality assurance is now an emerging sub - discipline of (36) . As Buckly and oston point out, (37) software quality assurance is likely to lead to an ultimate (38) of software costs. However, the major hurdle in the path of software management in this area is the lack of usable software (39) . The development of accepted and generally applicable standards should be one of the principal goals of (40) in software engineering.

A．balance

B．increment

C．production

D．reduction

金属材料室温拉伸试验方法为（）

A.GB/T231

B.GB/T228

C.GB/T4338