[判断题]Mason(梅逊公式)公式适用于线性和非线性定常系统.
[多选题]净现值率排序法的缺点是( )A、 计算简便,选择方法简明扼要B、 经常出现资金没有被充分利用的情况C、 不一定能保证获得最佳组合方案D、 一般能得到投资经济效果较大的方案组合
[单选题]自动导引车在平面上运动,一般具有的运动自由度是( )A.2个B.3个C.4个D.6个
[判断题]现浇水磨石地面之间嵌条的作用主要是美观.
[问答题]简述调查问卷设计的程序
[计算题]求函数f (x) = sinx + cosx在区间[0,2π]上的最大值和最小值
[单选题]选择性作用于β 1受体的药物是 A、 多巴胺 B、 多巴酚丁胺 C、 去甲肾上腺素 D、 麻黄碱 E、 异丙肾上腺素
[单选题]What he said was too ______ for me to understand and I got totally lost. A、 obvious B、 accurate C、 complex D、 awful
[单选题]以下能正确定义数组并正确赋初值的语句是( ) A) int N=5,b[N][N]; B) int a[1][2]={{1},{3}}; C) int c[2][]= {{1,2},{3,4}}; D) int d[3][2]={{1,2},{34}};
[单选题]His company owned dollars ten years ago.A. millions of. 2.00/2.00B. million.C. million of.D. ten millions
[判断题]铸铁管具有抗腐蚀性好、经久耐用、价格便宜的优点. ( )
[单选题]人类最终从动物分化出来的根本标志是( ) A直立行走 B制造工具 C抽象思维 D语言表达
[单选题]设f(x)=1 1 2/1 1 x2-2/2 x2+1 1,则f(x)=0的根是( ).A.1,1,2,2; B.-1,-1,2,2; C.1,-1,2,-2; D.-1,-1,-2,-2 .
[名词解释]证据法学
[单选题]仔猪梭菌性肠炎主要发生于的仔猪( )(A)2~3周龄(B)1~3日龄(C)0~10日龄(D)1月龄以上
[单选题]下列关于商法特征表述不准确的是( )A.较强的兼容性B.技术性C.公平性D.安全性
[问答题]企业系统结构
[阅读理解]Passage 1 There are stories about two U.S. presidents, Andrew Jackson and Martin Van Buren, which attempt to explain the American English term OK. We don’t know if either story is true, but they are both interesting. The first explanation is based on the fact that President Jackson had very little education. In fact, he had difficulty reading and writing. When important papers came to Jackson, he tried to read them and then had his assistants explain what they said. If he approved of a paper, he would write “all correct” on it. The problem was that he didn’t know how to spell, so what he really wrote was “ol korekt”. After a while, he shortened that term to “OK”. The second explanation is based on the place where President Van Buren was born, Kinderhook, New York. Van Buren’s friends organized a club to help him become President. They called the club the Old Kinderhook Club, and anyone who supported Van Buren was called “OK”.(1). ( )The author __________. A、 believes both of the stories B、 doesn’t believe a word of the stories C、 is not sure whether the stories are true D、 is telling the storie(2). ( )According to the passage, President Jackson __________. A、 couldn’t draw up any documents at all B、 didn’t like to read important papers by himself C、 often had his assistants sign documents for him D、 wasn’t good at reading, writing or spellings just for fun(3). ( )According to the first story, the term “OK” ___________. A、 was approved of by President Jackson B、 was the title of some official documents C、 was first used by President Jackson D、 was an old way to spell(4). ( )According to the second story, the term “OK” __________. A、 was the short way to say “Old Kinderhook Club” B、 meant the place where President Van Buren was born C、 was the name of Van Buren’s club D、 was used to call Van Buren’s supporters in the election “all c(5). ( )According to the second story, the term “OK” was first used _________. A、 by Van Buren B、 in a presidential election C、 to organize the Old Kinderhook Club D、 by the members of the “Old Kinderhook Club”orrect”
[单选题]下列项目中,不属于管理会计基本职能的是( )A.规划经营方针B.参与经营决策C.控制经济过程D.核算经营成果
[计算题]计算下列函数的导数:(1)y=1/√3x-5 (2)y=e^1/x+x√x (3)y=(3x^4-1)^100 (4)y=e^-x2+2x-1 (5)y=e^cos sin bx (6)y=1n(ax^2+b) (7)y=1n1nx (8)y=3^sin1/x (9)y=1n x+√1+x^2/x (10)y=(cosx)^x 2.计算下列函数的微分:(1)y=(3x^2+1)^2/3 (2)y=e^1/x -e^-x2 (3)y=2^x2+3x-1 (4)y=1-e^x2/cosx 3. 下列各方程中是的隐函数,试求y′或dy:(1)x^2+y^2-xy+3x=1,求dy;(2)xy-e^x+e^y=1,求y′;(3)sin(x+y)+e^xy=4,求y′;(4)x1ny+y1nx=1,求dy;
[判断题]所有的物证都是间接证据