- 表示其前连接的检索词必须出现在检索结果中，但其后连接的检索词不能出现在检索结果中的逻辑运算符（）
- () 又称为检索点(access point)、检索入口或检索标识，指用户进行信息检素的出发点和依据，它是由信息的内部特征和外部特征构成的。
- 在计算机信息检索中，用于组配检索词和限定检索范围的布尔逻辑运算符包括not、or和()
- 国家图书馆检索系统，检索符“?”和“#”的关系为: [ ]
- 关于检索工具的说法中，正确的是:[ ]
- 追溯法是指从已有文献的参考文献着手，追查原文，再利用这些原文的参考文献进行检索获得一批相关文献的方法。
- 顺排文档是指文献的某种属性或特征被用作文献标识,即当成可检索的字段,主题词、著者名、分类号等。
- 混排文档:文献的某种属性或特征被用作文献标识，即当成可检索的字段，主题词、著者名、分类号等。
- 截词检索技术，是指在检索式中砖门的截词符号即通配符)表示检索词的某一部分的一种检索方式，截词符可以代替-一个字符串,如字母、字母组合及汉字、词组等，常用的通配符有()号和(?)号。
- 试述文献检索的基本方法、途径与步骤。
- 若i,j已定义为int型,则以下程序段中循环体的总的执行次数是()。 for(i=5;i>=0;i--) for(j=0;j<4;j++) { }
- 以下程序段中的变量已正确定义 for(i=0;i<4;i=i+2) for(k=1;k<3;k++) printf("*"); 程序段的输出结果是 ()
- 以下程序的运行结果是()。 main() { int i,b,k=0; for(i=1;i<=5;i++) {b=i%2; while(b>0) { b--;k++;}} printf("k=%d,b=%d",k,b);}
- 有以下程序#includemain( ){ int i,j,m=1,s=0;for(i=1;i<3;i++){ for(j=3;j>0;j--){ m=i*j;s=s+m;}}printf(“s=%d\n”,s);}程序运行后的输出结果是 ()
- 若输入字符串:abcde,则以下while循环体将执行 【1】 次. while((ch=getchar())=='e') printf("*");回车>
- 以下do-while语句中循环体的执行次数是【1】. a=10; b=0; do { b+=2; a-=2+b; } while (a>=0);
- 若所用变量都已正确定义,请填写以下程序段的输出结果【1】. for(i=1;i<=5;i++); printf("OK\n");
- 下面程序的运行结果是 。main( ){ int i,j;for(i=0;i<=3;i++){ for(j=0;j<=5;j++){ if(i==0||j==0||i==3||j==5) printf(“*”);else printf(“ ”);}printf(“\n”);}}
- 下面程序的功能是从三个红球、五个白球、六个黑球中任取八个球,且其中必须有白球,输出所有可能的方案,请填空。#includemain( ){int i,j,k;printf(“\n 红 白 黑\n”);for(i=0; i<=3; i++)for( (1) ; j<=5; j++){k=8-i-j;if( (2) ) printf(“%3d%3d%3d\n”,i,j,k);}}
- 下面的程序是求1!+3!+5!+……+n!的和。#includemain( ){long int f,s;int i,j,n;(1) ;scanf("%d",&n);for(i=1;i<=n; (2) ){ f=1;for(j=1; j<=i;j++)(3);s=s+f;}printf("n=%d,s=%ld\n",n,s);}
- advance answered appropriately delivered fulfilled?xml:namespace>insert instructed knocked occupied passpromptly provoke tied trim ringHe had been kept busy all those years. But he always liked to do things very 1) _______, long before the deadline. In this way, even if he was 2) ________, everything would still work out 3)_____________.The case in point is that he would arrange to send his wife red roses every year before Valentine’s Day, 4)_____ with pretty bows. The note inside the enclosed card would say “I love you even more this year than last year on this day” or “My love for you will always grow with each passing year.” He could imagine how his wife would 5)_____ the stems, 6)______ them symbolically in a very special vase, and then be seated in the chair smiling at the roses sitting there.Maybe he realized that he would 7)_____away before long. He paid the florist a large sum of money in 8)________ to order roses for his wife on every Valentine’s Day. So even after his death, the roses were still 9)_________ to her door that very day. And maybe he knew that his wife would call the Florist after his death. Except for the usual notes, he wrote a special note which not only expressed his deep love for his wife, but also explained that the roses would come every year unless nobody 10)_________ the door (after five visits that day), and then the roses would be sent to the grave.
- At the very beginning, what kind of person Mrs. Auld was in my eyes?
- Why did Mrs. Auld stop teaching me how to spell word?
- When Mr. Auld forbade my mew mistress to instruct me, how did she react?
- Did Mr. and Mrs. Auld successfully stop my learning?
- Based on my master's trying to stop my learning, how did I feel about this?
- I didn't give up learning and found my new teacher, so who is my new teacher?
- How did I pay for the new teacher?
- When I fisrt tried to learn to write, what kind of learning material I can use?
- Every Monday afternoon when my mistress left home, what did I do?
- How long did I succeed in learning how to write?
- 当说明一个结构体变量时系统分配给它的内存是（ ）。
- static struct{int a1;float a2;char a3;}a[10]={1,3.5,'A'};说明数组a是数组，它有10个结构体型的元素，采用静态存储方式，其中被初始化的元素是：
- 结构体类型的定义允许嵌套是指:
- 在下列程序段中，枚举变量c1，c2的值依次是（ ）。enum color {red，yellow，blue=5，green，white} c1，c2；c1=red；c2=green；printf（“%d，%d\n”，c1，c2）；
- 在测试软件中设定了室内温湿度传感器的阈值后，超出或低于阈值分别将打开什么设备？
- 模拟量采集器上是否有Output口？若没有，其上多了哪些口，应该如何接线？
- 为什么室外温湿度传感器不需要配置阈值，控制其他设备？
- 日常用电中，不该带电的物体决不能带电。所以应该？
- 为什么灯座负极不接零线要接地？
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