高考数学（重庆专用 理科）一轮复习题库 12.2基本算法语句 Word版含解析

1、课时作业64基本算法语句一、选择题1给出程序如图所示，若该程序执行的结果是3，则输入的x值是()a3 b3c3或3 d02计算机执行下面的程序段后，输出的结果是()a1,3 b4,1c0,0 d6,03(2012杭州联考)将两个数a8，b17交换，使a17，b8，下面语句正确的是()a bc d4计算机执行下面的程序后，输出的结果是()a1,3 b 4,1 c6,18 d6,05对赋值语句，描述正确的是()可以给变量提供初值；赋值号左、右不能对换；可以给一个变量重复赋值；不能给一个变量重复赋值a bc d6对该程序判断正确的是()a求从1 000到1这1 000个自然数的和b求从1到1 000

2、这1 000个自然数的和c求从1到1 000这1 000个自然数的积d求从1 000到1这1 000个自然数的积7下面为一个求20个数的平均数的程序，则在横线上应填的语句为()ai20 bi20ci20 di20二、填空题8运行下列程序，则其输出的结果为_9下列程序是求一个函数的函数值的程序，在键盘上输入一个自变量x的值，输出它的函数值若执行的结果为3，则输入的x值为_10运行下面程序框内的程序，在两次运行中分别输入4和4，则运行结果依次为_三、解答题11阅读下面的程序，试求其输出的结果是多少12设计算法求1的值，画出程序框图，并编写程序参考答案一、选择题1c解析：该算法对应的函数为y|x|，

3、已知y3，则x32b解析：由语句知a134，b13b解析：由赋值语句可知b正确4c解析：aab236，bab63185d解析：不可以给一个变量重复赋值6b解析：由ssi，ii1，知该程序是求从1到1 000这1 000个自然数之和待添加的隐藏文字内容27a解析：加完第20个数后有i21故选a二、填空题8解析：第1次循环：s，n4，i2；第2次循环：s，n8，i3；第3次循环：s，n16，i4；第4次循环：s，n32，i5；第5次循环：s，n64， i6；第6次循环：s，n128，i7满足条件结束循环，输出s的值为94或3解析：此函数解析式为y当y3时，x4或x3101,20解析：当x4时，y2

4、，y11；当x4时，y34219，y120三、解答题11解：该程序是一当型循环结构，计数变量是k，当k10时运行循环体其功能是计算s1246810的值，易知s31，即输出的结果为3112解：程序框图：程序：29c91afe4ced1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91afedd1b6c87d1b6c8795ad9c91afe4ced1b6c8795ad91afe4ced1b6c8795ad9c91fe4ced1b6c8795ad29c91af95ad9c91afe4ced1b6c87

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