What is true about version-enabled tables?()
A. The unit of versioning is the schema.
B. It is possible to version enable a table pertaining to SY
C. There are as many segments as versions for the same base table.
D. It is possible to create workspaces if there is no version-enabled table in the database.
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Circle方法绘制扇形或圆弧图形时,图形的形状不仅与起始角、终止角的大小相关,而且与起始角、终止角的正或负相关。
A. 正确
B. 错误
生产工艺流程中起截流作用是()。
A. 流量计
B. 盲板
C. 工艺阀门
D. 静态混合器