You want to perform a backup of your database to tape. Which backup format can you use？（） ["backup set only","image copy only","only user-managed backup","both image copy and backup set","only incremental image copy backu"]
You deployed a Java EE Shared Library and want to use it from an application that is also deployed on the same cluster. Which two manifest attributes must be specified at a minimum with corresponding values in the deployment descriptor of the application that requires?（） ["Implementation-Version","Specification-Version","Extension-Name ","Specification-Vendor","Implementation-Vendor"]
pKa值是指（）。 ["药物90％解离时的pH值","药物99%解离时的pH值","药物50％解离时的pH值","药物不解离时的pH值","药物全部解离时的pH值"]
面对竞争，企业一般会采取哪些市场行为？
The STUDENT_GRADES table has these columns: The register has requested a report listing the students' grade point averages (GPA), sorted from highest grade point average to lowest within each semester, starting from the earliest date. Which statement accomplishes this?（） [" SELECT student_id, semester_end, gpa FROM student_grades ORDER BY semester_end DESC, gpa DESC;"," SELECT student_id, semester_end, gpa FROM student_grades ORDER BY semester_end ASC, gpa ASC;"," SELECT student_id, semester_end, gpa FROM student_grades ORDER BY semester_end, gpa DESC;"," SELECT student_id, semester_end, gpa FROM student_grades ORDER BY gpa DESC, semester_end DESC;"," SELECT student_id, semester_end, gpa FROM student_grades ORDER BY gpa DESC, semester_end ASC"]
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