【简答题】设有一个 SPJ 数据库,包括 S , P , J , SPJ 四个关系模式,用关系代数完成查询。 3 )求供应工程 J1 零件为红色的供应商号码 SNO :
【单选题】Jenny said that she was sorry she had got no knife ______.
【单选题】--- Why hasn’t Jenny turned up? --- Oh! She called me just now and said that she was _____ the way.
【简答题】He said to himself , "Where is Jenny?"(she)
【单选题】世界卫生组织( WHO )将 2019 年底在武汉发现的新型冠状病毒命名为?
【单选题】新型冠状病毒是以前从未在人类中发现的冠状病毒新毒株。世界卫生组织将2019年在武汉发现的新型冠状病毒命名为( )
【单选题】世界卫生组织,将武汉发现的新型冠状病毒命名为?
【单选题】世界卫生组织将这次武汉发现的新型冠状病毒命名为
【单选题】Jenny said she _____her holiday in China .