根据有害气体对人体的危害作用,可将有害气体分为三种:()和对中枢神经有损害的气体。
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Which two statements are true about the use of the procedures listed in the vsysaux_occupants.move_procedure column?()
A. The procedure may be used for some components to relocate component data to the SYSAUX tablespace from its current tablespace.
B. The procedure may be used for some components to relocate component data from the SYSAUX tablespace to another tablespace.
C. All the components may be moved into SYSAUX tablespace.
D. All the components may be moved from the SYSAUX tablespace.
混凝土入模温度,冷天不低于5℃,热天不高于()。
A. 25℃
B. 30℃
C. 35℃
D. 40℃
吊装作业应有专人负责、统一指挥,各个受力地锚应有()。
A. 专人检测
B. 专人安装
C. 专人看护
D. 专人松紧
万用表标尺端标有“AC”或“~”标记为测量直流电流和直流电压时用。
A. 正确
B. 错误