【简答题】( )是指用二维表的形式表示事物和事物间联系的数据模型。
【单选题】It was years ______ I bad visited my home town and I was determined to enjoy my stay.
【单选题】New York, ____ one of my friends last year, is a nice city. [ ]
【判断题】个人独资企业和合伙企业名称中都不能有“有限”、“有限责任”字样,他们都是法人企业。( )
【单选题】三端集成稳压电路LM137,其输出电压范围为( )V。
【判断题】个人独资企业和合伙企业名称中都不能有“有限”、“有限责任”字样,他们都是法人企业。( )
【单选题】It was years ______ I had visited my home town and I was determined to enjoy my stay.
【单选题】关系模型是指用二维表形式表示事物和事物间联系的( )