单选题
发布日期:2021-03-22
Methyl acrylate may be loaded in a tank adjacent to diethanolamine but not triethylamine
The heating coils to the cargo tank loaded with methyl acrylate must be blanked off
Valve components made of aluminum,copper,or zinc may not be in contact with the cargoes
Each crew member working on deck must have an emergency escape breathing apparatus
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新闻稿的结构包括()。
以“色、香、味”三绝著称于世的中国名酒是( )。
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