用10以内的质数,组成一个三位数,使它既含有约数2,又是3的倍数,这个三位数是(

题型:填空题

问题:

用10以内的质数,组成一个三位数,使它既含有约数2,又是3的倍数,这个三位数是(    )。

考点:2、3、5的倍数及其特征质数,互质数,分解质因数,合数
题型:填空题
某一时刻,身髙1.6m的小明在阳光下的影长是0.4m,同一时刻同一地点测得某旗杆的影长是5m,则该旗杆的高度是(  )
A.1.25mB.10mC.20mD.8m
题型:填空题

计算机中的流是( )。

A.流动的字节

B.流动的对象

C.流动的文件

D.流动的数据缓冲区

题型:填空题
两个完全相同的电热器,分别通有如图所示的交变电流,则它们的功率之比为(   )

A.4:1

B.1:

C.2:1

D.:1

题型:填空题

一物体做变速直线运动,某时刻的速度为4m/s,1s后速度的大小变为10m/s,在这1s内该物体的()

A.平均加速度大小只有一个值

B.平均加速度大小有多个值,各个值难以确定

C.速度的变化量可能小于初速度

D.速度的变化量可能大于末速度

题型:填空题

A discount retailer of basic household necessities employs thousands of people and pays most of them at the minimum wage rate. Yet following a federally mandated increase of the minimum wage rate that increased the retailer’s operating costs considerably, the retailer’s profits increased markedly.
Which of the following, if true, most helps to resolve the apparent paradox

A.Over half of the retailer’s operating costs consist of payroll expenditures; yet only a small percentage of those expenditures go to pay management salaries.

B.The retailer’s customer base is made up primarily of people who earn, or who depend on the earnings of others who earn the minimum wage.

C.The retailer’s operating costs, other than wages, increased substantially after the increase in the minimum wage rate went into effect.

D.When the increase in the minimum wage rate went into effect, the retailer also raised the wage rate for employees who had been earning just above minimum wage.

E.(E) The majority of the retailer’s employees work as cashiers, and most cashiers are paid the minimum wage.

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