旅游饭店餐饮部的营业活动主要由（）人员、（）人员和（）人员的共同努力来完成的。
《小学教师专业标准》是国家对合格小学教师专业素质的（），是小学教师开展教育教学活动的（），是引领小学教师专业发展的（），是小学教师培养、准入、培训、考核等工作的（）。
Which of the following SQL statements will return the year and average salary for all employees hired within a given year that have a salary greater than $30,000?（） SELECT * FROM t1 UNION SELECT * FROM t2。 SELECT * FROM t1 UNION DISTINCT SELECT * FROM t2。 SELECT * FROM t1 INTERSECT SELECT * FROM t2。 SELECT * FROM t1 WHERE (c1,c2)= (SELECT c1,c2 FROM t2)。
下列关于放火罪的犯罪构成表述正确的有（）。 侵犯的客体是公共安全。 客观方面表现为实施足以危害公共安全的放火行为。 主体是年满14周岁，具有刑事责任能力的自然人。 主观方面既可以出于故意，也可以出于过失。
You have enabled backup optimization for the RMAN environment.Identify two criteria on which RMAN will skip the file, if it has already been backed up.（） The data file backup is done with multiple channels。 The data files is in the read-write mode after being backed up in the read only mode。 The backup was taken after the data files was taken offline-normal or is in the read only mode。 The data file backup complies with the back retention policy and the backup duplexing feature。
水压试验压力：为检验气瓶静压强度进行以（）为介质的耐压试验压力。
