A standard CPK model, colored by element, against a stone background.The flat base-pairs are stacked in the center of the strand, perpendicular to the view, and the backbone makes a right-handed spiral around the central, vertical axis.

西北农林科技大学《植物营养学》ppt教学课件（英文版二），王林权主讲。主要内容包括绪论、跨膜传输机械、短距离传输与长距离传输、施用肥料、微量营养素、有机肥料等： lecture 1 introduction lecture 2 essential nutrients lecture 3 transport mechanism across membrane lecture 4 rooot and ntrients uptake lecture 5 rhizoshpere lecture 6 short distance transport and long distance transport lecture 7 foliar fertilzer lecture 8 the factors of effect nutrients uptake lecture 9 Fertility and Nutrient Bioavailability lecture 10 Application Fertilizer lecture 11 Nitrogen fertilzer lecture 12 Phophorus fertilizer lecture 13 K fertilzers lecture 14 secondary nutrients lecture 15 micronutrients lecture 16 organic fertilizer

THIS IS FOR THE STUDENTS WHO STUDY ENGINEERING AND FOR THE THESIS WRITING IN NORTH AMERICAN & ALL OVER THE WORLD.

The McGraw-Hill Dictionary of Engineering provides a compendium of more than 18,000 terms that are central to the various branches of engineering and related fields of science. The coverage in this Second Edition is focused on building construction, chemical engineering, civil engineering, control systems, design engineering,electricity and ... 1、Preface 2、Staff 3、How to Use the Dictionary 4、Fields and Their Scope 5、Pronunciation Key 6、A-Z Terms 7、Appendix

英文版《乳品生物化学》电子图书。

郧阳医学院《人体解剖学》ppt教学课件（三），主要内容包括动脉，腹部，颈部，血管学，食物系统，脑神经，解剖学系统，呼吸系统等多个部分。

麻省理工大学生物系列《Foundations of Biology》电子教案主要介绍了生物体系的基础部分，蛋白质结构等内容。

《饼干和点心生产手册-原料》（英文版）。

西北大学《综合英语》ppt、word完整课件，内容包括完整课件与试题库，章节齐全。

《循环系统（Circulatory system）》flash动画素材库（英文）一，主要包括心电图、血压、向大脑供给血液、静脉血栓等多个动画，动画演示清晰、流畅，英文解说准确、专业。