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大豆根瘤固氮活性对干旱的响应摘要：在开放的试验场地中通过定量浇灌控制土壤干旱程度，对盆栽大豆进行试验测定，研究了不同干旱程度对大豆根系，重点是根瘤活性的影响。结果表明，土壤的干旱程...

本科论文computers,replacing manual bookkeeping,accounting and reporting with electroniccomputers,and partially replacing manual analysis,forecasting and decision-making processof a...

本科论文AbstractThe origin and development of human beings have created many cultures.Economic and culture development is also rapid.From the technique of tying ropein ancient time...

毕业论文（设计）1.1 IntroductionEnglish idioms are usually widely and commonly used all over the world.They containbrief structures and profound meanings,which are also a group of ...

北京理工大学珠海学院2016届本科生毕业设计Design of apple vinegar workshop with an annual output of 60000 tonsAbstractApple is a nutritious,healthy and delicious fruit.Vinegar is a c...

本实验不用乳化剂（乳化剂残留对合成乳液的涂膜性能产生不利影响），成功合成水性PUA分散体。简要过程为：首先在丙烯酸单体存在下制备由一NCO封端的高分子预聚体，并使用少量HPA封端。预聚体残...

北京理工大学珠海学院2020届本科生毕业设计Design of a biodiesel factory with annual production of 8000 tons ofslops oilAbstractAs a kind of artificial treatment of restaurant waste c...

跨文化视角下中美时间观中记时制度的差异分析摘要近年来，中国加快了对外开放的步伐，加强了与世界的联系。来自不同背景的人们在日常生活、学习和商业事务中的交流也变得不可避免。本文以爱德华...

A Comparative Study of the Effects of Input/OutputPractice on Test PerformanceOf College English MajorsbyHu ShuqingUnder the Supervision ofProfessor Yan YixiSubmitted in Partial Fu...