销售终端机是安装在商户内，为持卡人提供授权、消费、结算等服务的专用银行电子设备。销售终端机的英文简称是（）。
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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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