已选分类
管理学
单选题Although it is assumed that peacocks" magnificent tails function essentially to attract peahens, no one knows why it should be magnificent tails that give a competitive advantage in securing mates. One explanation is that peahens are more likely to mate with peacocks with magnificent tails than with peacocks that lack magnificent tails.
Which of the following is an error of reasoning exemplified by the explanation?
单选题Atotalof774doctoratesinmathematicsweregrantedtoUnitedStatescitizensbyAmericanuniversitiesinthe1972～1973schoolyear,andWofthesedoctoratesweregrantedtowomen.Thetotalofsuchdoctoratesinthe1986～1987schoolyearwas362,andωoftheseweregrantedtowomen.IfthenumberofdoctoratesinmathematicsgrantedtofemalecitizensoftheUnitedStatesbyAmericanuniversitiesdecreasedfromthe1972～1973schoolyeartothe1986～1987schoolyear,wasthedecreaselessthan10percent?(1)(2)W=ω+5
单选题How many three-digit numerals begin with a digit that represents a prime number and end with a digit that represents a prime number?
单选题方差分析是 A．检验多个总体的方差是否相等 B．检验多个总体的均值是否相等 C．比较多个总体的方差大小 D．比较多个总体的均值大小
单选题在时间序列中，每项指标数值可以相加的是( )。 A．相对数时间序列 B．时期序列 C．平均数时间序列 D．时点序列
单选题There were 36,000 hardback copies of a certain novel sold before the paperback version was issued. From the time the first paperback copy was sold until the last copy of the novel was sold, 9 times as many paperback copies as hardback copies were sold, if a total of 441, 000 copies of the novel were sold in all, how many paperback copies were sold? (A) 45,000 (B) 360,000 (C) 364,500 (D) 392,000 (E) 396,900
单选题下面哪个是二级市场并购的特点（）
单选题根据整体产品概念，“免费送货”属于：( )
单选题How many positive integers k are there such that 100k is a factor of (22)(3)(53)?
单选题A company that ships boxes to a total of 12 distribution centers uses color coding to identify each center. If either a single color or a pair of two different colors is chosen to represent each center and if each center is uniquely represented by that choice of one or two colors, what is the minimum number of colors needed for the coding? (Assume that the order of the colors in a pair does not matter.) (A) 4 (B) 5 (C) 6 (D) 12 (E) 24
单选题DISTRlBUTl0NOFSALESINCOMEFORSTORESLASTWEEKAccordingtothegraphabove,thesaleoffruitsandvegetablesinStoreSlastweekaccountedforwhatpercentofthetotalsalesincomefortheweek?(1)LastweekthetotalincomefromthesaleoffruitsandvegetablesinStoreSwas$16,000.(2)x=2y
单选题数据161， 162，163， 164，165，161，165，163，165，166的中位数是 A．163 B．163．5 C．164 D．0
单选题每期期末等额付款项的年金，称为：
单选题An infinite sequence of positive integers is called an "alpha sequence" if the number of even integers in the sequence is finite. If S is an infinite sequence of positive integers, is S an alpha sequence? (1)The first ten integers in S are even. (2)An infinite number of integers in S are Odd.
单选题分类数据不可绘制( )。 A．条形图 B．圆形图 C．饼形图 D．累计频数折线图
单选题Ifab≠0,inwhatquadrantofthecoordinatesystemabovedoespoint(a,b)lie?(1)(b,a)liesinquadrantⅣ.(2)(a,-b)liesinquadrantⅢ.
单选题Walter: A copy of an artwork should be worth exactly what the original is worth if the two works are visually indistinguishable. After all, if the two works are visually indistinguishable, they have all the same qualities, and if they have all the same qualities, their prices should be equal.
Marissa: How little you understand art! Even if someone could make a perfect copy that is visually indistinguishable from the original, the copy would have a different history and hence not have all the same qualities as the original.
单选题In an office, 40 percent of the workers have at least 5 years of service, and a total of 16 workers have at least 10 years of service. If 90 percent of the workers have fewer than 10 years of service, how many of the workers have at least 5 but fewer than 1 0 years of service?
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.
单选题对占全区煤炭开采量75/%的大矿井进行劳动生产率调查，这是( )。 A．全面调查 B．抽样调查 C．典型调查 D．重点调查