“项目难度”的概念、定义、翻译、参考文献-科学参考

单词	项目难度
释义	项目难度 Encyclopedia 理学项目分析释 item difficulty项目难度被试完成测验项目任务时所遇到的困难程度。一般在学业和能力测验中会较多使用难度来考察项目对于被试的难易程度。
随便看	shortest spanning tree shortest tree shortest vector problem short exact sequence short fiber content short finish shortfin mako short focus lens short hairpin RNA，shRNA short-hole blasting of open pit short hole ore blast Shorthorn short increment sensitivity index shorting short inter-frame space short inter-frame space, SIFS short interspersed element short interspersed nuclear element short interspersed repeated sequence short line short lived intermediates short lived nucleus short-lived nucleus short-lived plant short-lived radionuclide dating

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。