点击切换搜索课件文库搜索结果(3414)
文档格式:PPT 文档大小:6.89MB 文档页数:21
Leading-in Activities: Discussion 1. What's your definition of money? 2. What attitude should we take toward money? 3.what’ your fantasy?
文档格式:PPT 文档大小:113.5KB 文档页数:11
稳定和转捩的特征表现 1.先发生二维不稳定性T-S波 2.三维不稳定性λ,波 3底层发生涡的伸长卷起, 4漩涡猝发和溅射後平静交替.湍流斑形成
文档格式:PDF 文档大小:1.77MB 文档页数:60
O Copyright 2006 SAP AG. All rights reserved IBM, DB2, DB2 Universal Database, OS/2, Parallel Sysplex, MVS/ESA, AIX, S/390, AS/400, OS/90, OS/400, iSeries, PSeries, xSeries, zSeries, The information in this document is proprietary and contains z/OS, AFP, Intelligent Miner, WebSphere, Netfinity, Tivoli, Informix
文档格式:DOC 文档大小:134.5KB 文档页数:3
调度中心对某种数据采集的周期因任务而有不同: (1)为完成对全系统正常运行时的监视功能,一般要求 SCADA系统对各厂、站设备的运行数据,每30s采集一次;
文档格式:PDF 文档大小:136.94KB 文档页数:2
当木原(95)首次通过核置换回交,将普通小麦awm核基因导入尾状山 草( A e caudata}細胞质产生小麦雄性不育来这一发现为利用小麦杂种优势带来了希望, 但由于尾状山羊草细胞质除能诱导雄性不育外,也带来许多有害的副作用,使其难用于 实际生产。当啊s和R9%2报道培育成功提型小麦雄性不育系后,杂种小麦的研 究与利用才广泛开展起来
文档格式:PDF 文档大小:57.96KB 文档页数:1
随着生物技术的发展和不断完善,许多研究者试图通过生物技术的方法来获得雄性 不育。如 Mariani等, Koltunow等,Li等分别将白喉毒素和两个不同的核糖核酸 酶( Rnase T1和 Barnase)基因进行融合,通过含抗除草剂基因的植物双元表达载体转 化烟草,得到转基因雄性不育烟草和油菜再如 Schmulling等将农杆菌 Rhizogenes A的T-DNA间的rolc基因与CaMV35s启动子串联成嵌合基因转化烟草,结果rolc基因 在转基因植株中的系统表达,出现雄性不育植株
文档格式:DOC 文档大小:151.5KB 文档页数:12
第一节 概 述 第二节 药物代谢的酶( E n z y m e s f o r D r u g M e t a bo lism) 第三节 第Ⅰ相的生物转化(PhaseⅠ B iotransformation)
文档格式:PPT 文档大小:2.92MB 文档页数:67
Introduction: Weathering The Breakdown of Rock At the Earth's surface, rocks are exposed to the effects of weathering: the chemical alteration and mechanical breakdown of rock, when exposed to air, moisture, and organic matter. Weathering is an integral part of the rock cycle. Weathering converts rock to regolith
文档格式:PPT 文档大小:3.26MB 文档页数:58
Introduction: What Is an Igneous rock? Igneous rocks vary greatly. Some contain large mineral grains. Others contain grains so small they can barely be seen under a high power microscope. Igneous rocks also vary greatly in color. All igneous rocks are formed through the cooling and solidification of magma
文档格式:PPT 文档大小:788KB 文档页数:34
Earth's Internal Structure When a meteorite impacts a planet or moon, its energy of motion (called kinetic energy)is transformed into heat energy. As Earth grew larger and larger from continual impacts, its temperature increased. Radioactive decay of materials like uranium, thorium and potassium also added heat
首页上页203204205206207208209210下页末页
热门关键字
搜索一下,找到相关课件或文库资源 3414 个  
©2008-现在 cucdc.com 高等教育资讯网 版权所有