在数据库设计中，用E-R图来描述信息结构但不涉及信息在计算机中的表示，它是数据库设计的()阶段
A、概念模型B
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Iwanttogotothegrocery,butyou_______withme.
Sitbackandreflecton______itisthatyoudobestandwhatyouenjoy.
Rock:______.
Sharon:Verywell,andtheexperimentisnearlyfinished.
Thereisno( )betweenthenations.
Asthenumberofparticipantshasincreasedfrom60to98,wewonderifwecanuseLectureHall'A'as'B'willbetoosmall.
