【多选题】【消耗次数：1】
当局部Ｅ-Ｒ图合并成全局Ｅ-Ｒ图时可能出现冲突，具体包括（ ）。
①
属性冲突
②
语法冲突
③
结构冲突
④
命名冲突
参考答案：
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相关题目
【简答题】
在数据库概念结构设计中，各分E-R模型之间的冲突主要有：属性冲突、[填空]和结构冲突。
随机题目
【单选题】
不能对二维数组a进行正确初始化的语句是（ ）
①
int a[3][2]={1,2,3,4,5};
②
int a[3][]={{1,2,3},{4,5,6}};
③
int a[][2]={{1,2},{3,4},{5,6}};
④
int a[3][2]={{1},{2,3},{4,5}};
【简答题】
说明下列2个图例符号的名称、字母及数字的含义。<img width="70" height="141" style="width: 86px; height: 168px;" src="data:image/png;base64,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"/>[填空(1)]
【单选题】
通过分析线段，应按（ ）的顺序绘制平面图形。
①
已知线段、中间线段、连接线段
②
中间线段、已知线段、连接线段
③
连接线段、中间线段、已知线段
④
已知线段、连接线段、中间线段
【单选题】
正确的左视图是（）<img src="https://file.icve.com.cn/doc_public2/319/180/4FD2D2B45E7EDE18B6AF6CC6057DCD52.png" title="1.png" alt="1.png"/>
①
<img src=http://222.173.11.71/doc_public/b@3E58CC9DF22906412A671903FC025133.png title=2.png alt=2.png/>
②
<img src=http://222.173.11.71/doc_public/b@3DD7834E39705F419658EAB926BABC7A.png title=3.png alt=3.png/>
③
<img src=http://222.173.11.71/doc_public/b@5307D9221B31A8537919762793130020.png title=4.png alt=4.png/>
④
<img src=http://222.173.11.71/doc_public/b@BDCCB9F062E4F37481D7F5938F219B14.png title=5.png alt=5.png/>
【单选题】
正面和水平投影图所对应的侧面投影图为 。<img src="https://file.icve.com.cn/doc_public2/963/120/F0C1E39E534CDD6CEFEC0C0481C5E3D1.png" title="1.png" alt="1.png"/>
①
<img src=http://222.173.11.71/doc_public/b@D4BB62899709BE2F45F414C28A4CA9A7.png title=2.png alt=2.png/>
②
<img src=http://222.173.11.71/doc_public/b@D26AC752421CD577BAB086C3FDDDFA77.png title=3.png alt=3.png/>
③
<img src=http://222.173.11.71/doc_public/b@41023E220058FAAA5E536AE1226629A8.png title=4.png alt=4.png/>
④
<img src=http://222.173.11.71/doc_public/b@14215B63E40DF13F895F5CB38760F767.png title=5.png alt=5.png/>