单项选择题

适合反映两个变量的关系的统计图是(  )。

A.直方图
B.条形图
C.散点图
D.圆形图
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阅读以下说明和C代码,将应填入(n)处的字句写在对应栏内。[说明]下面程序用来将打乱的单词还原为原来的次序,比如将rty还原为try。单词的原来次序存储于wordlist.txt文件中,原则上可用穷举法(rty对应的穷举为:rty、ryt、try、tyr、ytr、yrt),但考虑到破译速度,采用如下方法。注意到单词列表中不存在组成字符完全相同的单词(如Hack12与Hack21包含完全相同的字符),因此将单词中的字符进行重组再进行比较,例如,try单词重组为rty(按ASCⅡ码顺序),这样不管打乱的单词是什么顺序,只要是由r、t、y三个字母组成的均破译为try,大大提高破译速度。程序中借助二叉排序树以进一步提高查找效率,二叉排序树左子树(如果有)上的节点对应的值均小于根节点的值,右子树(如果有)上的节点对应的值均大于根节点的值。函数中使用的符号定义如下:#define NumberofWords 1275 单词总数#define MaxLength 10 最长单词所含字符数char WordList[NumberofWords][MaxLength]; 存储单词列表int cmp(Node *q,Node *p); q与p比较。p小,返回负值;P大返回正值:相等,返回0typedef struct Node( 二叉树节点char *eleLetters; 重组后的字符串int index; 对应单词表中的下标struct Node *lChiId,*rChiid; 左右子节点}Node;[C代码]void reCompose(Node *p,char *temp) 重纰,亦即将temp字符串中的字符升序排序,存储于p节点中 采用直接插入排序法{char c;strcpy(p->eleLetters,temp); int len=strlen(temp);int i,j,k;for(i=0;i<len-1;i++){k=i;for(j=i+1;j<lan;j++){if(p->eleLetters[j]<P->eleLetters[k])k=J;}if( (1) ){C=P->eleLetters[i];P->eleLetters[i]=P->eleLetters[k];P->eleLetters[k]=c;} if} for};int find(Node &root,char *temp) 在二叉排序树root中查找与temp匹配的单词。 若匹配返回相应单词在WordList中下标;若查找失败,返回-1{Node *P,*q;int flag;P=(2); 临时存储reCompose(p,temp); 将temp重组q=&root;while((flag=(3))&&q !=NULL){if(flag<0){ 搜索左子树q=q->lChiid;}else( 搜索右子树q=q->rChild;}} whileif(flag==0){ 找到匹配的,保存下标return (4);}}if( (5) ){ 查找失败printf('cant unscramble the following word:%s',temp);;return -1;}};(1)
A.txt文件中,原则上可用穷举法(rty对应的穷举为:rty、ryt、try、tyr、ytr、yrt),但考虑到破译速度,采用如下方法。
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?Read the article below about the securities exchangE.?Choose the best sentence to fill in each of the gaps.?For each gap 8-12, mark one letter(A-G)on your Answer Sheet.?Do not use any letter more than oncE.The Securities ExchangeWhen people buy stock, most do so through one of the securities exchanges or marketplaces for stocks and bonds. These marketplaces are commonly called 'stock exchanges' and they provide a meeting place for both the buyer and seller. To understand why such securities or stock exchanges are important in the purchase and sale of stocks and bonds, consider what would happen if you, and everyone who wanted do buy (or sell) securities, had to find your own buyer (or seller). If the market is going down the only way to recover your investment is to hang on to the stock and wait for it to come back. More importantly, how would you find out who is interested in selling that stock to you (or buying it from you)? In order to handle this marketing problem, securities exchanges sprung up. These exchanges are nothing more than locations where stocks are bought and solD.And since there is a common meeting place for there (or send their representatives). The result is a very systematic market process, where transations are handled in an orderly manner and the operations are both supervised and regulated by law. (8) Buying and Selling SecuritiesThe general approach in buying and selling securities, regardless of the exchange where they are purchased, is basically the same, We provide a general picture of how security transactions take place; and for a fuller understanding, we will discuss some of the important terminology and functions of security trading. (9)How would you go about buying stock in a major corporation? It's really quite simplE.First, you would decide what you want to buy—such as 100 shares of IBM. (10)Assuming your broker works for a major stock brokerage, the order would be telephoned directly to a company clerk on the floor of the New York Stock ExchangE.The clerk would hand the order to a member of the Exchange who is a partner in the brokeragE.This individual would then go to the appropriate locale on the trading floor and ask for the latest quote on IBM. Let us say it is '70 to a quarter.' (11)If your broker wants, a sale can be struck at $ 70.25 since the order calls for a purchase at the current market pricE.More likely, however, your broker will bid $ 70.125 and hope to save you one eighth of a point or $ 12.50. And it is likely that another broker with an order to sell will show up and accept the bid of $ 70 1 8. The two brokers will then initial each other's sales orders and see that the transaction is relayed to the exchange employee known as the reporter. The reporter sees that the sale is reported and a few minutes later it will come out on the ticker tapE.Bulls and BearsWhat does 'a bull' mean? It is a term that is used to refer to an invester who expects prices to risE.(12) Of course, the market will not always risE.Sometimes stocks drop and remain low for extended periods of timE.Those investors who expect stock prices to decline are known as 'bears.' During the Great Depression, the bears made a great deal of money. While the bulls were 'buying long' the bears were 'selling short.'A How would you know what a fair price for the security is?B This means that someone is currently bidding '$ 70 for the stock and another party is willing to sell at $ 70.25.'C How stocks are actually purchasedD 'Bulls' buy in anticipation of the market going up.E In this way, the buyer (or seller) is ensured that the best price is secured and they are not shortchanged or cheated in any way.F&nbs
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G.125
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A
M.25.'
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