对于操作压力要求绝对平稳的容器，应选用（）式安全阀。
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《决定》指出，建立宪法宣誓制度，什么人何时公开向宪法宣誓？
Evaluate the SQL statement DROP TABLE DEPT: Which four statements are true of the SQL statement? （）
A. You cannot roll back this statement.
B. All pending transactions are committed.
C. All views based on the DEPT table are deleted.
D. All indexes based on the DEPT table are dropped.
E. All data in the table is deleted, and the table structure is also deleted.
F. All data in the table is deleted, but the structure of the table is retained.
G. All synonyms based on the DEPT table are deleted.
低压断路器是主要用于配电线路和电气设备的过载、失压、欠压和短路保护的设备。
A. 正确
B. 错误
在PowerDesigner中，既支持在概论层又支持在物理层建立和维护数据模型的模块是（）。
A. ProcessAnalyst
B. DataArchitect
C. AppModeler
D. WarehouseArchitccture
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