“item difficulty”的概念、定义、翻译、参考文献-科学参考

单词	item difficulty
释义	item difficulty 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	rocket dynamic test tower rocket ejection seat rocket engine ignition test at high altitude rocket engine precooling rocket engine test rocket exploration of the upper atmosphere rocket fairing rocket flow-out test rocket for artificially triggering lightning rocket ground support equipment rocket highway transporter rocket infrared astronomy rocket kerosene rocket mechanism rocket motion equation rocket propellant rocket-ramjet combined cycle engine rocket range safety control rocketry rocket sled rocket static test-firing facility rocket structure rocket train rocket ultraviolet astronomy rocket X-ray astronomy

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。