可行性原则
可行性原则就是研究者应根据主客观条件来选择研究课题,以保证课题的研究工作能顺利地、高质量地完成,取得预期的研究成果。P45
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If you speak English, you might be acquainted with quite a few other languages as well: Greek, Latin, German, French, Spanish, and Thai, to name just a __16__ You may not be fluent in any of these languages, but every day you usewords from their v