问题 单项选择题

甲乙两个工厂的平均技术人员比例为45%,其中甲厂的人数比乙厂多12.5%,技术人员的人数比乙厂的多25%,非技术人员人数比乙厂多6人。甲乙两厂共有多少人?()

A.680

B.840

C.960

D.1020

答案

参考答案:A

解析:和差倍比问题解析由题干中"甲厂人数比乙厂多12.5%"可知甲、乙两厂总人数之比为9:8,则可假设甲厂总人数有9n,乙厂总人数有8n,甲乙总人数为17n,故总人数一定能被17整除,排除选项B、C;在A和D之间选择,直接代入A选项,则有680=17n,n=40,则甲厂共360人,乙厂共320人,两厂的技术人员总数为680×45%=306人,甲厂技术人员有170人,非技术人员为190人,乙厂有技术人员136人,非技术人员184人,甲乙两厂的非技术人员相差190-184=6人,满足题意,验证成立。故正确答案为A。标签直接代入数字特性

阅读理解

The hardworking blacksmith Jones used to work all day in his shop and so hard-working was he that at times he would make the sparks (火星) fly from his hammer.

The son of Mr. Smith, a rich neighbor, used to come to see the blacksmith every day and for hours and hours he would enjoy himself watching how the tradesman worked.

“Young man, why don’t you try your hand to learn to make shoe tacks (钉), even if it is only to pass the time?” said the blacksmith. “Who knows, one day, it may be of use to you.”

The lazy boy began to see what he could do. But after a little practice he found that he was becoming very skilled and soon he was making some of the finest tacks.

Old Mr. Smith died and the son on account of the war lost all his goods. He had to leave home and was forced to live in another country. It so happened that in this village there were many shoemakers who were spending a lot of money buying tacks for their shoes and even at times when they paid high prices they were not always able to get what they wanted, because in that part of the country there was a high demand for soldiers’ shoes.

Our young Mr. Smith, who was finding it difficult to earn his daily bread, remembered that once upon a time he had learned the art of making tacks and had the sudden idea of making a bargain with the shoemakers. He told them that he would make the tacks if they would help to get him settled in the workshop. The shoemakers were only too glad of the offer. And after a while, Mr. Smith found that he was soon making the finest tacks in the village.

“How funny it seems,” he used to say, “even making tacks can make money. My trade is more useful to me than all my former riches.”

小题1: The young man learnt to make shoe tacks because ________.

A.his father told him to

B.he wanted to learn a skill

C.Jones encouraged him to

D.he just wanted to pass his time小题2: Which of the following is TRUE according to the passage?

A.Old Mr. Smith enjoyed making the shoe tacks.

B.The blacksmith had predicted the young man would be in need of the skill.

C.The higher prices they paid, the more tacks the shoemakers would get.

D.The young man earned his living by his skills learnt when he was young.小题3: What can we learn from the story?

A.Practice makes perfect.

B.Skill makes life easy.

C.A good beginning makes a good ending.

D.Every man has his gift.

单项选择题