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焊芯中的锰元素是一种很好合金剂,当含碳量在2%以下时,随着锰含量的增加,钢的机械性能,特别是强度和韧性提高,是较好的()
关于小儿山根穴的描述哪项是不正确的:()
组成值班的船员的职责包括()
属于《卫生部关于加强卫生行业作风建设的意见》提出的八项行业纪律之一的是()
具有温补肺肾、定喘功效,善治肾不纳气虚喘劳嗽的药物是()
当听到或感到爆炸声和空气冲击波时,应立即()声响和气波传来方向卧倒。
什么是清洁动物?
简述徐霞客游历考察的三个突出成果。
公众在突发核辐射事件中应如何应对?
下列各项关于资源税减免税规定的表述中,正确的有()。
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A Notice of Marine Casualty to a vessel must include().
The notice of casualty to a vessel must include().
The notice of casualty to a ship must include().
You must()in this area unless you have messages about the casualty.
What is this notice mainly about?
Why was this notice posted?
For whom is the notice most likely intended?
What is the purpose of this notice?
What does the notice mainly discuss?
船钟()