根据《水利工程质量管理规定》（水利部令第7号），加强工程质量管理，建立健全施工质量检查体系的主体是（）。
A. 施工单位
B. 设计单位
C. 项目法人（建设单位）
D. 质量监督机构
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一台微机共有32MB内存，则其高内存区的内存为（）
A. 640KB
B. 384KB
C. 约64KB
D. 32MB
测试JRJC-66/345型交流二元继电器的磁路平衡？
Which two statements about views are true? （）
A view can be created as read only.
B. A view can be created as a join on two or more tables.
C. A view cannot have an ORDER BY clause in the SELECT statement.
D. A view cannot be created with a GROUP BY clause in the SELECT statement.
E. A view must have aliases defined for the column names in the SELECT statement.
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