何谓中心同步实体、集中式同步机构和非集中式同步机构?
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为什么在访问文件之前,要用open系统调用先打开该文件?
为了快速访问,又易于更新,当数据为以下形式时,应选用何种文件组织方式?(1)不经常更新,经常随机访问:
A ___is the basic form. of a word which cannot be further analyzed without total loss of identity.
If you don’t, you could end ____ spending hundreds of dollars more than you should have.