植物农药学视频资料。

压力和斯托克斯流动2、随体导数及奈维-斯托克斯方程3、层流边界层与曳力系数4、传热和传质系数的计算

望而却步的科学哲学第一章从公认的观点到波普的观点第二章从波普到新的异端第二篇经济学方法论的历史第三

The book is intended for more advanced students of English. It is written mainly as a self-study book, but might also be used in class with a teacher. It revises some of the more difficult points of grammar that you will have already studied - such as when to use the, a/an or no article, and when to use the past simple or the present perfect - but will also introduce you to many more features of English grammar appropriate to an advanced level of study.

这是清华大学的汽车设计用书，很不错的材料，可以帮你学习汽车设计方面的问题。

The First Global Financial Crisis of the 21st Century. 次贷危机英文版。

在现实工作中﹐经常会用的精典电工公式。

传染病，犬瘟热，牛流行热，兔病毒性出血症，马传染性贫血病等。

的取值,运用正交试验的方法,对肋厚、肋长、肋高三要素进行优化设计。结果表明,该方法不仅能够得到参数的

演示了“内旋轮线的产生”的知识原理。