发生特大质量事故,事故单位要在()小时内向有关单位提出书面报告。
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道路危险货物运输从业人员的头部受到毒性物质污染时,首先应注意____。
A. 打电话求援
B. 用大量清水冲洗
C. 用毛巾擦抹干净
ISM第九章与第十章中的“不符合规定的情况”有什么异同?
A user executes the statement; PURGE BINARY LOGS TO 'mysql-bin.010'; What is the result?()
A. It deletes all binary log files, except 'mysql-in.010'
B. It deletes all binary log files up to and including 'mysql-bin.010'
C. It deletes all binary log files before 'mysql-bin.010'
D. It deletes all binary log files after 'mysql-bin.010'
ZD6型电动转辙机的自动开闭器各接点片压力均匀,接触压力不小于()。