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问卷调查
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问卷调查
通过制定详细周密的问卷,要求被调查者据此进行回答以收集资料的方法。是一组与研究目标有关的问题,或者说是一份为进行调查而编制的问题表格。是人们在社会调查研究活动中用来收集资料的一种常用方法。又称调查表。
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nucleic acid chain resection
nucleic acid chemical biology
nucleic acid chemistry
nucleic acid damage
nucleic acid database
nucleic acid detection of genetically modified ingredients
nucleic acid drugs
nucleic acid electrophoresis
nucleic acid hairpin structure
nucleic acid hybridization
nucleic acid isolation machine
nucleic acid liquid-phase synthesis
nucleic acid metabolism
nucleic acid methylation
nucleic acid metrology
nucleic acid modification
nucleic acid probe
nucleic acid repair
nucleic acid self-assembly
nucleic acids encoding
nucleicacids invasive analysis
nucleic acid solid-phase synthesis
nucleic acid-stable isotope probing technique
nucleic acid stem-loop structure
nucleic acid structure
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