单选题某商品价格发生变化，现在的100元只值原来的90元，则价格指数为( )。 A．10/% B．90/% C．110/% D．111/%

单选题Inspection system X and inspection system Y, though based on different principles, each detect all product flaws, but they each also erroneously reject three percent of flawless products. Since false rejections are very costly, money will be saved by installing both systems, instead of either one or the other, and rejecting only products found flawed by both. The argument above requires which of the following assumptions?

单选题普查规定标准时点是为了( )。 A．避免登记的重复与遗漏 B．确定调查对象的范围 C．确定调查单位 D．确定调查期限

单选题A certain encyclopedia has 20 volumes, each of which is ω inches wide, k inches long and t inches thick. If all of the volumes are to be tightly packaged in one rectangular box that is k inches wide and ω inches deep inside, could the inside length of the box be less than 35 inches. (1)t=1.5 (2)ω=9 and k=12

单选题企业在不同的细分市场推出不同的产品，并在渠道、促销和定价方面都加以相应改变，以适用不同细 分市场的需要，这被称为：

单选题WhatfractionalpartofthetotalsurfaceareaofcubeCisred?(1)Eachof3facesofcisexactlyred.(2)Eachof3facesofCisentirelywhite.

单选题设a，b，c为整数，且|a-b|20+|c-a|41＝1，则|a-b|+|a-c|+|b-c|＝( )。

单选题现有一数列：3，9，27，81，243，729，2 187，反映其平均水平最好用( )。 A．算术平均数 B．调和平均数 C．几何平均数 D．众数

单选题 LEAGUE RESULTS Team Number of Games Won A 4 B 7 C 9 D 2 E 2 X According to the incomplete table above, if each of the 6 teams in the league played each of the other teams exactly twice and there were no ties, how many games did team X win? (Only 2 teams play in a game.)

单选题当一组数据的分布为对称分布时，最好用( )作为该组数据的概括性度量。 A．众数 B．均值 C．中位数 D．极差

单选题对职工的生活水平状况进行分组研究，正确地选择分组标志应当用( )。 A．职工月工资总额的多少 B．职工人均月收入额的多少 C．职工家庭成员平均月收入额的多少 D．职工的人均月岗位津贴及奖金的多少

单选题If,wherepandqarenonzerointegers,isnaninteger?(1)n2isaninteger.(2)isaninteger.

单选题先将总体各单位按主要标志分组，再从各组中随机抽取一定单位组成样本，这种抽样形式被称为( )。 A．简单随机抽样 B．等距抽样 C．类型抽样 D．整群抽样

单选题In how many arrangements can a teacher seat 3 girls and 3 boys in a row of 6 seats if the boys are to have the first, third, and fifth seats?

单选题A jewelry dealer initially offered a bracelet for sale at an asking price that would give a profit to the dealer of 40 percent of the original cost. What was the original cost of the bracelet? (1)After reducing this asking price by 10 percent, the jewelry dealer sold the bracelet at a profit of $403. (2)The Jewelry dealer sold the bracelet for $1,953. (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．

单选题宝洁公司在洗衣粉上使用“汰渍”、“cheers”等多个品牌，同样，在洗发水上使用“潘婷”、 “海飞丝”、“飘”等品牌。宝洁采用的是：

单选题Ifnisaninteger,isaninteger?(1)isaninteger.(2)isaninteger.

单选题下列( )数据是顺序型品质数据。 A．王仲的性别为男 B．李明的数学期中成绩为78分 C．江涛的学历为大学本科 D．陶敏的年龄25岁

单选题如果所有标志值的频数都扩大为原来的5倍，而标志值仍然不变，则算术平均数( )。 A．不变 B．扩大到5倍 C．减少为原来的1/5 D．不能预测其变化