The STUDENT_GRADES table has these columns: STUDENT_ID NUMBER(12) SEMESTER_END DATE GPA NUMBER(4,3) 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_grade。
施工总体部署包括以下工作（） 建立施工管理机构。 进行施工组织安排。 划分施工任务，确定施工关系及施工顺序。 编制施工准备计划。
You performed an incremental level 0 backup of a database: RMAN > BACKUP INCREMENTAL LEVEL 0 DATABASE; To enable block change tracking after the incremental level 0 backup, you issued this command: SQL > ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ‘ /mydir/rman_change_track.f’; To perform an incremental level 1 cumulative backup, you issued this command: RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which three statements are true?（） Backup change tracking will sometimes reduce I/O performed during cumulative incremental backups.。 The change tracking file must always be backed up when you perform a full database backup.。 Block change tracking will always reduce I/O performed during cumulative incremental backups.。 More than one database block may be read by an incremental backup for a change made to a single block.。 The incremental level 1 backup that immediately follows the enabling of block change tracking will not read the change tracking file to discover changed blocks.。
工程开始前，（）应对工程的文档资料收集分类等提出统一的要求，制定统一的格式样本。工程施工的资料应真实地记录工程的过程和状况。 建设单位。 监理单位。 项目法人。 招标单位。
Given. Which two statements are true？（） Foo.beta（） is a valid invocation of beta（）.。 Foo.alpha（） is a valid invocation of alpha（）.。 Method beta（） can directly call method alpha（）.。 Method alpha（） can directly call method beta（）.。
为了确保楼梯栏杆高度满足要求，内楼梯扶手高度自（）量起不宜小于0.90m。
