通过现身说法促成吸烟老年人树立戒烟的信念,符合老年健康教育的()
A. 鼓励性原则
B. 指导性原则
C. 说服性原则
D. 预防性原则
E. 实践性原则
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三相异步电动机虽然种类繁多但基本结构均由定子和转子两大部分组成。()
A. 正确
B. 错误
Which two are prerequisites for performing a flashback transaction?()
A. Flashback Database must be enabled.
B. Undo retention guarantee for the database must be configured.
C. EXECUTE privilege on the DBMS_FLASHBACK package must be granted to the user flashing back transaction.
D. Supplemental logging must be enabled.
E. Recycle bin must be enabled for the database.
F. Block change tracking must be enabled tor the database.
夏季高温时间槽车水箱缺水后,需要加水前必须先排空水箱
A. 正确
B. 错误
文化交流与文化融合在中华文化的形成和壮大中起了什么作用?