根据统计法的规定,统计调查对象包括()和公民个人。
A. 国家机关
B. 社会团体
C. 企业事业组织
D. 个体工商户
E. 基层群众性自治组织
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测量轴电压和在转动着的发电机上用电压表测量转子绝缘的工作,应使用专用电刷,电刷上应装有500mm以上的绝缘柄。
A. 正确
B. 错误
You plan to execute the following command to perform a Flashback Database operation in your database: SQL> FLASHBACK DATABASE TO TIMESTAMP (SYSDATE -5/24); Which two statements are true about this?()
A. The database must have multiplexed redo log files
B. The database must be in the MOUNT state to execute the command
C. The database must be in the NOMOUNT state to execute the command
D. The database must be opened in RESTRICTED mode before this operation
E. The database must be opened with the RESETLOGS option after the flashback operatio
检水尺的内直径为10mm。
A. 正确
B. 错误
功率谱的初步估计不是无偏估计。
A. 正确
B. 错误