Then =1-91=1(3+:2)(3+2n 可=-1-3)=1(4-+2)(1-2+a With 1 0 O: Thus, in equilibrium, we must have ai=.2. In fact, the two firms must sit in the middle By Proposition 2.1, Pi=p?=c Discussion

一、判断题(对打O,错打X。每小题3分,共计9分) 1.局部坐标系单元刚度矩阵和整体坐标系单元刚度矩阵]均为对称矩阵。() 2.当结构中某杆件的刚度增加时,结构的自振频率不一定增大。()

环状化合物,环上除碳,还有杂原子(N、O、S等) 环具有芳香结构和一定的稳定性(闭合共轭体系) 根据以上定义,酸酐、环氧、内酯、内酰胺不属杂环化合物 核酸碱基:

8.5.1配位场化学 化合物着色的最重要的来源是过渡族元素 (cr,mn,fe,o,Ni)或稀土元素离子(钕、铒、钬 等),它们或出现于固溶体中,或以晶体的固有阳离 子存在。 这些元素在电子占据轨道方面不同于主族元素。如对 于过渡族元素,主要涉及能量很相近的部分添满的3d 轨道(简并能级)

Information and the Manager e Data raw facts such as the number of customers Information: data arranged in a meaningful fashion Good information possesses these attributes o Information Quality: measures information accuracy and reliabilit

Groups. Teams and Effectiveness oGroup: two or more people who interact with each other to accomplish a goal. oTeam: group who work intensively with each other to achieve a specific common goal All teams are groups, BUT, not all groups are teams. o Teams often are difficult to form I Takes time for members to work together. Teams can improve organizational performance Irwin/McGraw-Hill

Management Key Concepts Organizations: People working together and coordinating their actions to achieve specific g coals o Goal a desired future condition that the organization seeks to achieve Management: The process of using organizational resources to achieve the organization's goals by

以水平弹簧振子为例讨论简谐振动系统的能量 动能(c+1o)nieo=m

3参数方程所给函数求导公式: dy y(t 设函数x=),y=()可导且()≠0,→ay() 证(法一)用定义证明. (法二)由9()≠0,→恒有()>0或φ(O)<0.→∞)严格单调 (这些事实的证明将在下 章给出)因此,(有反函数,设反函数为t=(x),有 ()=(a1(x)用复合函数求导 法,并注意利用反函数求导公式就有

胸部创伤 hest trauma 胸内脏器:肺和心脏大血管 胸内负压:-078~-0.98kPa(-8~-10cmH2O) 胸部伤后易发生呼吸和循环功能障碍 个平时多为交通事故伤 战时阵亡者约2%~27%死于胸部伤 美国每年15万人死于创伤,其中胸伤占25% 我国: