已选分类
管理学工商管理
单选题5，6，7三个数的几何平均数( )。 A．大于6 B．小于6 C．等于6 D．等于5
单选题Ounce for ounce, blends of different artificial sweeteners match any individual artificial sweetener in sweetening power. When used to sweeten food, blends greatly decrease the likelihood that consumers will exceed acceptable daily intakes for individual sweeteners. Blends should therefore be used, rather than single sweeteners alone, since blends are clearly more healthful, yet equally effective.
The argument above depends on which of the following assumptions?
单选题If P is a set of integers and 3 is in P, is every positive multiple of 3 in P? (1)If x is in P，then x+3 is in P. (2)If x is in p, then x-3 is in p. (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．
单选题下列调查中，最适合采用重点调查的是( )。 A．了解全国钢铁生产的基本情况 B．了解全国人口总数 C．了解上海市居民家庭的收支情况 D．了解某校学生的学习情况
单选题Which of the following best completes the passage below?
The unemployment rate in the United States fell from 7.5 percent in 1981 to 6.9 percent in 1986. It cannot, however, be properly concluded from these statistics that the number of unemployed in 1986 was lower than it had been in 1981 because______
单选题技术引进可以提高企业的技术水平，而衡量技术引进成功与否的唯一标志是( )。 A．产量 B．经济效益 C．工资水平 D．市场份额
单选题Inthefigureabove,howmanyofthepointsonlinesegmentPQhavecoordinatesthatarebothintegers?
单选题If n and p are different positive prime numbers, which of the integers n4, p2, and np has (have) exactly 4 positive divisors?
单选题The wild mouflon sheep of the island of Corsica are direct descendants of sheep that escaped from domestication on the island 8,000 years ago. They therefore provide archaeologists with a picture of what some early domesticated sheep looked like, before the deliberate selective breeding that produced modern domesticated sheep began.
The argument above makes which of the following assumptions?
单选题下列变量哪个属于连续变量( )。 A．职工人数 B．原煤产量 C．汽车产量 D．居民户数
单选题How many integers between 324,700 and 458,600 have tens digit 1 and units digit 3? (A) 10,300 (B) 10,030 (C) 1,353 (D) 1,352 (E) 1,339
单选题统计分析报告的编写，其标题要( )。 A．严谨、分明、清晰 B．确切、简明、有吸引力 C．突出、正确、鲜明、集中 D．简短、精悍、形式新
单选题Woodsmoke contains dangerous toxins that cause changes in human cells. Because woodsmoke presents such a high health risk, legislation is needed to regulate the use of open-air fires and wood-burning stoves.
Which of the following, if true, provides the most support for the argument above?
单选题If x, y, and z are single-digit integers and 100(x)+1,000(y)+10(z)=N, what is the units' digit of the number N? (A) 0 (B) 1 (C) x (D) y (E) z
单选题加权算术平均数数量指标指数中的权数为( )。 A．p0q0 B．p1q1 C．p1q0 D．p0q1
单选题若因变量随自变量的变动而发生大致均匀的变动，说明两变量之间的关系是( )。 A．正相关 B．负相关 C．直线相关 D．曲线相关
单选题TOTALEXPENSESFORTHEHVEDIVISIONSOFCOMPANYHThefigureaboverepresentsacirclegraphofCompanyH'stotalexpensesbrokendownbytheexpensesforeachofitsfivedivisions.IfOisthecenterofthecircleandifCompanyH'stotalexpensesare$5,400,000,whataretheexpensesfordivisionR?(1)x=94(2)ThetotalexpensesfordivisionsSandTaretwiceasmuchastheexpensesfordivisionR.
单选题下列关系中，属于正相关关系的有( )。 A．合理限度内，施肥量和平均亩产量之间的关系 B．产品产量与单位产品成本之间的关系 C．商品的流通费用与销售利润之间的关系 D．流通费用率与商品销售量之间的关系
单选题如果一个时间数列的自相关系数出现周期性的变化，每间隔若干个便有一个高峰，表明该时间数列是( )。 A．随机性时间数列 B．平稳性时间数列 C．存在着某种趋势的时间数列 D．季节性时间数列
单选题The fossil record shows that the climate of North America warmed and dried at the end of the Pleistocene period. Most of the species of large mammals then living on the continent became extinct, but the smaller mammalian species survived.
Which of the following, if true, provides the best basis for an explanation of the contrast described above between species of large mammals and species of small mammals?