点击切换搜索课件文库搜索结果(3897)
文档格式:PPT 文档大小:898KB 文档页数:45
2-1生态学基础 一、生态学与生态 1.生态学(Ecology): A.传统定义:研究生物 与其生活环境相互关系的学科。( 侧重于植物、动物)
文档格式:DOC 文档大小:293KB 文档页数:5
一、富里埃(Fourier)级数的引进 1定义:设f(x)是(-∞,+∞)上以2元为周期的函数,且f(x)在[-,]上绝对可积,称形如 a+∑( cos nx+ sin nx) 2n=1 的函数项级数为f(x)的 Fourier级数(f(x)的 Fourier展开式)
文档格式:DOC 文档大小:28.5KB 文档页数:6
Gross Domestic Product (GDP) Defintion: GDP is the total market value of all final goods and services produced by a country Final versus Intermediate By final\, we mean the goods and service that are purchased for final use by purchaser and not for resale or further processing. The meaning intermediate is opposite to final
文档格式:PPS 文档大小:10.37MB 文档页数:34
9-4用基点法求平面图形内各点的加速度 作平面运动的平面图形S, 选A点为基点。其运动可分解为: S 1、随基点的平动一牵连运动
文档格式:DOC 文档大小:39.5KB 文档页数:2
Task Team of FUNdaMENTAL aCCOUNtIng School of Business. Sun Yat-sen University Lesson 2 Economic Transactions and Accounting equation Exercises 1. Lion Company had a net cash inflow of $80,000 from operating activities. It spent $40,000 on investing activities. Lion Company received $50,000 in cash from issuing stock. Calculate the ease or decrease in cash
文档格式:PPT 文档大小:1.44MB 文档页数:117
Plant nitrogen 1.1 Uptake of N 1. N is required by plants in large amounts Most plant material contains 2-4%N and 40%C. 2. N is usually the limiting nutrient in unfertilized systems 3. Most n is taken up from the soil in the form of nht or no a small amount of NH3 can be absorbed through the leaves N2 can be used by legume plant via biological nitrogen fiXation
文档格式:PPT 文档大小:1.36MB 文档页数:53
THE CELL WALL Before traversing the plasma membrane(p. m., ions must first cross the cell wall and contact the p. m the bulk flow of soil solution coul theoretically carry inorganic ions into the cell wall and through the apoplastic pathway. The thickness of a cell wall is in the range of 500 to 1000 nm. It is porous
文档格式:PDF 文档大小:82.34KB 文档页数:2
1.1试举几个开环控制系统与闭环控制系统的例子,画出它们的框图,并说明它们的工作原理。 1.2根据图题1.2所示的电动机速度控制系统工作原理图 (1)将a,b与c,d用线连接成负反馈系统; (2)画出系统方框图
文档格式:PPT 文档大小:33KB 文档页数:8
(1)鉴于乙方与甲方订立本合同,安装甲方的空气调 节设备,双方协议如下: Whereas party b and party a have entered into this Contract to install Party As air-conditioning equipment, the he Parties hereto do hereby agree as follows (2)鉴于该银行同意向该公司提供短期信贷作为资金 周转之用,双方达成协议如下: Whereas the Bank has agreed to extend as Short Term Credit loan for the purpose of providing general working capital to the company, the Parties thereto do hereby agree as follows
文档格式:PDF 文档大小:42KB 文档页数:2
本文档将给出用 Mathcad计算方程根的方法. 求方程x3-17x+32=0在区间(-2,-1)、(1,2)、(16,17)中的根 方法1:调用root(f(x),x,[a,b])函数直接计算 g(x)=x3-17x2+32 root(g(x),x,-2,-1)=-1.32158root(g(x),x,,2)=1.4378root(g(x),x,16,17)=16.887
首页上页349350351352353354355356下页末页
热门关键字
搜索一下,找到相关课件或文库资源 3897 个  
©2008-现在 cucdc.com 高等教育资讯网 版权所有