pre-study period是什么意思

pre-study period是什么意思 pre-study visit 如何翻译? hrs是什么单位?The inhibitor was added after 24 hrs pre-corrosion period .这句话中的hrs是单位吗? 高分追加：求分析此句的各个成分?谢谢a commonly drawn distinction is between pre-history ,i.e. the period before written records -and history in the narrow sense, meaning the study of the past using written evidence. Pre-mRNA是什么 PRE OUT是什么 pre-iPSCs中文是什么? pre-k是什么 study skills period 6的中文意思 Put the following group of sentences into correct order to make a coherent paragraph.1) The unrelated questions in the objective test drive the student to learn by rote isolated facts during the pre-test period of study.2) Unlike the unrelated questi 求分析此句的各个部分,作为此句的什么成分?a commonly drawn distinction is between pre-history ,i.e.the period before written records -and history in the narrow sense,meaning the study of the past using written evidence. time period 的意思是什么? conside or examine by argument 和 a period of suspension of regular work ,study 的英语单词是什么这是用英语解释英语的问题 period Ctrl+PERIOD是什么快捷键 PERIOD是什么意思是哪个按键 Pre-adding Water 是什么东东啊? cur和pre是什么英文的简称 Pre-A Level帮我介绍一下pre-alevel,及读这个的用处是什么?