已选分类
管理学工商管理
单选题方程|x-|2x+1||-4的根是( )．
单选题During a 3-year period, the profits of Company X changed by what percent from the second year to the third year? (1)The increase in profits of Company X from the first year to the second year was the same as the increase from the first year to the third year. (2)For Company X, the profits for the first year were $13,800 and the profits for the third year were $15,900.
单选题If 10 persons meet at a reunion and each person shakes hands exactly once with each of the others, what is the total number of handshakes? (A) 10·9·8·7·6·5·4·3·2·1 (B) 10·10 (C) 10·9 (D) 45 (E) 36
单选题IftheratioofmentowomenemployedbyCompanySin1975was,whatistheratioofmentowomenemployedbyCompanySin1976?(1)CompanySemployed20morewomenin1976thanin1975.(2)CompanySemployed20moremenin1976thanin1975.(A)条件(1)充分，但条件(2)不充分．(B)条件(2)充分，但条件(1)不充分．(C)条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．(D)条件(1)充分，条件(2)也充分．(E)条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
单选题总量指标是用( )表示的。 A．绝对数形式 B．相对数形式 C．平均教形式 D．百分比形式
单选题Point(x,y)hasinwhichquadrantoftherectangularcoordinatesystemshownabove?(1)x+y＜0(2)x=1andy=-7(A)条件(1)充分，但条件(2)不充分．(B)条件(2)充分，但条件(1)不充分．(C)条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．(D)条件(1)充分，条件(2)也充分．(E)条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
单选题评价回归直线方程拟合优度如何的指标有( )。 A．回归系数b B．直线截距a C．判定系数r2 D．相关系数r
单选题产品“三包”服务统计、接待用户和访问用户情况的统计属于( )服务情况的统计指标。 A．销售业务 B．使用指导 C．销售技术
单选题Last year Luis invested x dollars for one year, half at 8 percent simple annual interest and the other half at 12 percent simple annual interest. Now he wants to reinvest the x dollars for one year in the same two types of investments, but the lower rate has decreased, If the higher rate is unchanged, what fraction of the x dollars must be reinvest at the 12 percent rate s that the total interest earned from the x dollars will be the same for both years? (1)The lower rate is now 6 percent. (2)The total amount of interest earned from the two investments last year was $3,000. (A) 条件(1)充分，但条件(2)不充分． (B) 条件(2)充分，但条件(1)不充分． (C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分． (D) 条件(1)充分，条件(2)也充分． (E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
单选题一元线性回归模型与多元线性回归模型的区别在于只有一个( )。 A．因变量 B．自变量 C．相关系数r D．判定系数r2
单选题Iftaxifareswere$1.00forthefistmileand$0.20foreachmilethereafter,thenthetaxifarefora3-mileridewas(A)$1.56(B)$2.40(C)$3.80(D)$4.20(E)$2.80
单选题下列因素中，与样本容量成反比的是 A．置信概率 B．总体均值 C．总体方差 D．边际误差
单选题过程能力指数与产品质量的关系是 A．过程能力指数越大，产品质量越高 B．过程能力指数越小，产品质量越高 C．过程能力指数越大，产品质量越低 D．两者无关
单选题How many integers between 100 and 150, inclusive, can be evenly divided by neither 3 nor 5? (A) 33 (B) 28 (C) 27 (D) 25 (E) 24
单选题The country of Maravia has severe air pollution, 80 percent of which is caused by the exhaust fumes of cars. In order to reduce the number of cars on the road, the government is raising taxes on the cost of buying and running a car by 20 percent. This tax increase, therefore, will significantly reduce air pollution in Maravia.
Which of the following, if true, most seriously weakens the argument above?
单选题All of the tickets for two real estate seminars, F and G, were either purchased or given away, and the ratio of F tickets to G tickets was 2 to 1. Of the total number of F tickets and G tickets, what percentage was purchased? (1)The total number of F tickets and G tickets is 240. (2)Of the F tickets, exactly 60 percent were purchased, and of the G tickets, exactly 80 percent were purchased. (A) 条件(1)充分，但条件(2)不充分． (B) 条件(2)充分，但条件(1)不充分． (C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分． (D) 条件(1)充分，条件(2)也充分． (E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
单选题下列属于原始记录的是( )。 A．班组记录 B．企业报表 C．统计年鉴 D．统计公告
单选题If 27
P
×3
2
=3
4
×9
8
, what is the value of p?
单选题正在成熟的行业具体有的特点是（ ）
单选题某城市进行工业企业未安装设备普查，总体单位是( )。 A．该市工业企业全部未安装设备 B．该市工业企业每一台未安装设备 C．该市每个工业企业的未安装设备 D．该市每一个工业企业