在特殊环境焊接与热切割作业中,()事故发生频率最高。
A. 中毒
B. 坠落
C. 火灾爆炸
D. 触电
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脘腹肿块,推之可移,痛无定处,聚散不定。此为()
A. 痞满
B. 瘕聚
C. 水肿
D. 内痈
E. 瘕积
Each hand portable fire extinguisher on a ship must be marked with().
A. the name of the unit on which it is located
B. the date that it was installed on the unit
C. the names of the individuals qualified to use it
D. an identification number different from other extinguishers on the unit
《中华人民共和国国家通用语言文字法》是于2000年10月31日,第几届全国人民代表大会常务委员会第几次会议通过?