搜题请搜索小程序“爱下问搜题”
问题 单项选择题

如果配送成本与路程的相关性较强，而与其他因素的相关性较小时，在选择配送路线时可选（）为目标。

A.以效益最高

B.以吨公里数最小

C.以成本最低

D.以路程最短

答案

参考答案：D

解析：配送路线目标的选择包括：①以效益最高为目标。指计算时以利润最大化为目标；②以成本最低为目标。实际上也是选择了以效益为目标；③以路程最短为目标。如果成本与路程相关性较强，而和其他因素的相关性较小时，可以将其作为目标；④以吨公里数最小为目标。在"节约里程法"的计算中，采用这一目标；⑤以准确性最高为目标。它是配送中心中重要的服务指标。还可以选择运力利用最合理、劳动消耗最低作为目标。

填空题

以下程序中，函数SumColumMin的功能是：求出M行N列二维数组每列元素中的最小值，并计算它们的和值。和值通过形参传回主函数输出。请填空。
#define M 2
#define N 4
void SumColumMin(int a[M][N]，int*Sum)
int i,j,k,s=0
for(i=0;i＜N;i++)
k=0;
for(j=1;j＜M;j++)
if(a[k] [i]＞a[j] [i])k=j;
s+= 【17】 ；

【18】 =s;

main()
int x[M][N]=3,2,5,1,4,l,8,3),s;
SumColumMin( 【19】 )；
printf("%d\n",s);
查看答案
单项选择题

For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never ending flood of words. In (1) a job or advancing in one, the ability to read and comprehend (2) can mean the difference between success and failure. Yet the unfortunate fact is that most of us are (3) readers. Most of us develop poor reading (4) at an early age, and never get over them. The main deficiency (5) in the actual stuff of language itself—words. Taken individually, words have (6) meaning until they are strung together into phrases, sentences and paragraphs. (7) , however, the untrained reader does not read groups of words. He laboriously reads one word at a time, often regressing to (8) words or passages. Regression, the tendency to look back over (9) you have just read, is a common bad habit in reading. Another habit which (10) down the speed of reading is vocalization—sounding each word either orally or mentally as (11) reads.
To overcome these bad habits, some reading clinics use a device called an (12) , which moves a bar(or curtain) down the page at a predetermined speed. The bar is set at a slightly faster rate (13) the reader finds comfortable, in order to "stretch" him. The accelerator forces the reader to read fast, (14) word by word reading, regression and subvocalization practically impossible. At first (15) is sacrificed for speed. But when you learn to read ideas and concepts, you will not only read faster, (16) your comprehension will improve. Many people have found (17) reading skill drastically improved after some training. (18) Charlie Au, a business manager, for instance. His reading rate was a reasonably good 172words a minute (19) the training; now it is an excellent 1,378 words a minute. He is delighted that how he can (20) a lot more reading material in a short period of time.

A．enabling
B．leading
C．making
D．indicating
查看答案