已选分类
管理学工商管理
单选题What is the tens digit of positive integer x? (1)x divided by 100 has a remainder of 30. (2)x divided by 110 has a remainder of 30. (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
单选题During his three years in office, the governor of a state has frequently been accused of having sexist attitudes toward women. Yet he has filled five of the nineteen vacant high-level positions in his administration with women appointees, all of whom are still serving. This shows that the governor is not sexist.
Which of the following statements, if true, would most seriously weaken the conclusion above?
单选题货币流通速度愈快，流通中所需要的货币量( )。 A．愈少 B．愈多 C．无变化 D．时多时少
单选题If x and y are prime numbers, which of the following CANNOT be the sum of x and y?
单选题以下指标恒为正的是( )。 A．相关系数 B．截距a C．斜率b D．复相关系数
单选题Committee X and committee Y, which have no common members, will combine to form Committee Z. Does Committee X have more members than Committee Y? (1)The average (arithmetic mean) age of the members of Committee X is 25.7 years and the average age of the members of Committee Y is 29.3 years. (2)The average (arithmetic mean) age of the members of Committee Z will be 26.6 years.
单选题Politician: Unless our nation redistributes wealth, we will be unable to alleviate economic injustice and our current system will lead inevitably to intolerable economic inequities. If the inequities become intolerable, those who suffer from the injustice will retort to violence to coerce social reform. It is our nation"s responsibility to do whatever is necessary to alleviate conditions that would otherwise give rise to violent attempts at social reform.
The statements above logically commit the politician to which one of the following conclusions?
单选题低机会和低威胁的业务被称为（）
单选题Extinction is a process that can depend on a variety of ecological, geographical, and physiological variables. These variables affect different species of organisms in different ways, and should, therefore, yield a random pattern of extinction. However, the fossil record shows that extinction occurs in a surprisingly definite pattern, with many species vanishing at the same time.
Which of the following, if true, forms the best basis for at lest a partial explanation of the patterned extinction revealed by the fossil record?
单选题单位产品成本报告期比基期下降5/%，产量增加5/%，则生产费用( )。 A．增加 B．降低 C．不变 D．很难判断
单选题A rectangle is defined to be "silver" if and only if the ratio of its length to its width is2 to 1. If rectangle S is silver, is rectangle R silver? (1)R has the same area as S. (2)The ratio of one side of R to one side of S is 2 to 1.
单选题Last Tuesday a trucker paid $155.76, including 10 percent state and federal taxes, for diesel fuel. What was the price per gallon for the fuel if the taxes are excluded? (1)The trucker paid $0.118 per gallon in state and federal taxes on the fuel last Tuesday. (2)The trucker purchased 120 gallons of the fuel last Tuesday. (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．
单选题时间数列可以分为( )。 A．时期数列和时点数列两种 B．绝对数、相对数和平均数时间数列三种 C．绝对数和平均数时间数列两种 D．分配数列和变量数列两种
单选题用简单随机抽样(重复抽样)方法抽取样本单位，如果要使抽样允许误差降低50/%，则样本容量需扩大到原来的( )。 A．2倍 B．3倍 C．4倍 D．5倍
单选题If p and q are positive integers, what is the value of q?
(1)q
p-1
=1
(2)p=1
单选题Ifxandyaredifferentprimenumbers,eachgreaterthan2,whichofthefollowingmustbetrue?Ⅰx+y≠91Ⅱx-yisaneveninteger.Ⅲisnotaninteger.
单选题Mouth cancer is a danger, for people who rarely brush their teeth. In order to achieve early detection of mouth cancer in these individuals, a town"s public health officials sent a pamphlet to all town residents, describing how to perform weekly self-examinations of the mouth for lumps.
Which of the following, if true, is the best criticism of the pamphlet as a method of achieving the public health officials" goal?
单选题In order to relieve congestion in the airspace near the airports of a certain country, transportation officials propose sending passengers by new rapid trains between the country"s major airport and several small cities within a 300-mile radius of it. This plan was proposed even though the officials realized that it is the major airport that is congested, not those in the small cities.
The plan to relieve congestion would work best if which of the following were true about the major airport?
单选题Coins are to be put into 7 pockets so that each pocket contains at least one coin. At most 3 of the pockets are to contain the same number of coins, and no two of the remaining pockets are tO contain an equal number of coins. What is the least possible number of coins needed for the pockets? (A) 7 (B) 13 (C) 17 (D) 22 (E) 28