某机主存容量为16MB，cache容量为16KB，主存与cache每块都分为16B，主存与cache地址变换采用直接映像方法。这种映像方法优点是算法简单，缺点是(1)。若访问的主存单元为B4AF45H，而且该单元已经装入cache，则cache的地址是(2)。

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Software　quality　assurance　is　now　an(71)sub-discipline　of　software　engineering.　As　Bucldy　and　Oston　point　out,(72)software　quality　assurance　is　likely　to　lead　to　an　ultimate(73)of　software　costs.　However,　the　major　hurdle　in　the　path　of　software　management　in　this　area　is　the　lack　of(74)software　standards.　The　development　of　accepted　and　generally　applicable　standards　should　be　one　of　the　principal　goals　of(75)in　software　engineering.

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