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【单选题】
Recently, the government considered adding an excise tax on CDs that can be used to record music and CD players that can record discs. If this tax was enacted, we would expect:A.
that consumers would pay a higher price and producers would sell fewer of these CDs and CD players than before the tax.
B.
there to be no effect on consumption or the prices paid by consumers of these CDs and CD players.
C.
that consumers would pay a lower price and producers would receive a higher price for these CDs and CD players than before the tax.
D.
there to be an increase in economic activity due to the tax.
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【单选题】数据序列{5,4,15,10,3,1,9,6,2}是某排序方法第一趟后的结果,该排序算法可能是( )。
A.
冒泡排序
B.
二路归并排序
C.
堆排序
D.
简单选择排序
【单选题】用希尔排序方法对一个数据序列进行排序时，若第1趟排序结果为9，1，4，13，7，8，20，23，15，则该趟排序采用的增量(间隔)可能是( )。[2014年全国试题10(2分)】
A.
2
B.
3
C.
4
D.
5
【单选题】对于数控车削加工,下列说法错误的是[ ]。
A.
由数控加工程序控制主轴的回转运动以及刀具的进给运动
B.
加工精度和效率大大提高
C.
减少了对操作者手工操作技能的依赖
D.
采用与普通车削加工相同的机床
【简答题】设有一个有序数据序列,其中各记录的关键字为{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15},当用折半查找算法查找关键字1,8,17时,其比较次数分别为多少?
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