一、平面曲线弧长 (1)曲线:y=f(x) asxsb=f+fx (2) =x(t) =y(t) astsB s=x'2()+()dt (3) r=r(e) asess s=()+()de 例求下类平面曲线的弧长

02-01-05一级考试选择题(S) 1、目前微型计算机所采用的CPU() A)不仅是Intel和与其兼容的CPU B)都是Intel和与其兼容的CPU C)都是Intel公司生产的CPU D)都是Pentium CPU 2、衡量计算机硬件系统的主要性能指标中不包括() A)字长 B)主存容量 C)主频 D)操作系统性能 3、八位无符号二进制整数的最大值对应的十进制数为() A)255B)256C)511D)512

字符串( String 字符串是n(≥0)个字符的有限序列, 记作S:“cc2g3…Cn” 其中,S是串名字 “c2c3…cn”是串值

一、选择题(共30分) 1(本题3分) 一质点作直线运动,某时刻的瞬时速度v=2m/s,瞬时加速度a=-2m/s2,则一秒钟后质点的速度

Confidentiall For Siemens internal use, onlyl Automation and Drives S7-200CN CPU overview S7-200 CN CPU Overview

3-1(1)铁饼离手时的角速度为 =v/R=25/1.0=25(rad/s) (2)铁饼的角加速度为 2 252 a== =39.8(rad/s2) 202×2×1.25

多元方差分析的主要用途是同时分析和检验不同类别在多个间距测度等级变 量上是否存在显著差别。这种方法由威尔克(S.S.Wlk)在1932年创建,后来 又得到逐步发展和完善。现在,许多计算机统计软件中都已经具有多元方差分析 的功能。但是,这种方法在我国社会科学研究中的应用尚属少见,有待进一步推 本章第一节将从多元方差分析与一元方差分析的关系入手,简介相关方法的 沿革及多元方差分析的特点。第二节主要介绍多元方差分析所要求的变量、数据 方面的条件

Ⅱ. Listening skills Understanding Times and dates w: Oh, look at the clock It's 5: 15. I'll be late for Jennifer's birthday party! I was supposed to leave at 5 o'clock M: Don't worry! You still have some time. The clock is twenty minutes fast Q What time is it now?

Ⅱ. Listening skills Dialog 1 Girl 1: What do you think of this miniskirt, Amy? pretty hot stuff, eh? Girl 2: Wow... it's pretty short. My mom would never let me wear something like that Girl 1: My mom's cool. She lets me make my own decisions about clothes

unit 9 Here are the seasons to be jolly I. Basic listening practice the holidays people celebrate, Christmas, Easter, Mother's Day . which are the most important to you? M: Christmas and easter, because they mark events in Jesus Christ's life: his birth and