数据库的重组织不要求修改应用程序,也不改变数据的______。
A.逻辑结构和物理结构
B.输入和输出
C.存储模式
D.数据库的关联顺序
参考答案:A
读下面的句子,然后将它们按顺序排列成对话。
__1__ Sure. The fashion show will start at 10:30 tomorrow morning in Zhongguancun Shopping Center.
__2__ Hi. Michael. we are going to watch a fashion show tomorrow. Would you like to go with as?
__3__ How do you know that?
__4__ I read the poster. it also says many famous model are going there to model the clothes.
__5__ A fashion show? Sounds interesting. could you tell me when and where?
某小学校因停电,午餐在饭店为学生订做盒饭,学生们食用后大约4小时,陆续出现头晕、上腹部疼痛、腹泻、恶心、呕吐,腹泻为黄绿色水样便,一日数次至十余次,体温在38~40℃。
中毒食品最可能是()。
A.米饭
B.鱼
C.熟肉类
D.蔬菜
E.腐乳