Joe Read studied in this school for fourteen years. When he finished school, he was already eighteen years old. And then his father said to him, “You finished school, and you are a good student. Now you may go to town and get a good job. They need some clever people to work in the office. The people there can get a lot of money now. If you stay at home, you can’t get money from our family.” A few weeks later, Joe went to the office and asked for a job there. A man took him into a small room and gave him some questions on a piece of paper. Joe answered the questions quickly, and he gave the paper to the man. The man looked at the paper for a few minutes and then asked, “You were born on Sep. 23. But which year were you born in?” Joe answered, “Oh, every year.”

小题1: How old was Joe when he went to school?

A．8.

B．18.

C．4.

D．14.小题2: What place did his father want him to work in?

A．A school.

B．An office

C．A house.

D．A shop.小题3:What did his father think of Joe?

A．He was a good student.

B．He wasn’t a good student.

C．He wasn’t clever.

D．He could get money from his family.小题4: Why did the man give Joe a piece of paper?

A．Because he wanted to give Joe a job.

B．Because he wanted Joe to answer some questions.

C．Because he wanted to know if Joe was clever.

D．Because he wanted to know how old Joe was.小题5:From Joe’s answered, “Oh, every year.”, we can infer(推测) that________.

A．he didn’t want to work in the office

B．he was hardworking but dishonest

C．he was outgoing and clever

D．in fact, he didn’t really answer the man’s question

阅读文章，完成下列问题。

　　春秋五霸时期，越王勾践“卧薪尝胆”，一举击败了吴王夫差，演出了历史上春秋争霸的最后一幕。岁月的流逝，使这场惊心动魄的战争静静沉睡在历史的长卷里，忙忙碌碌的后人几乎把它遗忘了。

　　然而，1965年，一支考古队在挖掘春秋古墓时，却意外发现了一把沾满泥土的长剑，剑身上一行古篆——-“越王勾践自用剑”跃入人们眼帘。拔剑出鞘，寒光耀目，而且毫无锈蚀，刃薄锋利，20余层纸一划而破。这把剑全长为55．6厘米，其中剑身长45．6厘米，剑宽5厘米。剑身满饰黑色菱形几何暗花纹，剑格正面和反面还分别用蓝色琉璃和绿松石镶嵌成美丽的纹饰，剑柄以丝线缠缚，剑首向外形翻卷作圆箍，内铸有极其精细的11道同心圆圈。这一重大的考古发现立即轰动了全国，但是，更加轰动的消息却来自对古剑的科学研究报告。最先引起研究人员注意的是：这柄古剑在地下埋藏了两千多年为什么没有生锈呢？为什么依然寒光四射、锋利无比呢？

　　为解开勾践剑千古之谜，1977年12月，上海复旦大学静电加速器实验室的专家们与中国科学院上海原子核研究所活化分析组及北京钢铁学院《中国冶金史》编写组的学者们一道，采用质子X荧光非真空分析法对越王勾践剑进行了无损科学检测，得出了剑身青铜合金分配比的准确数据表。越王勾践剑的主要成分是铜、锡、以及少量的铝、铁、镍、硫组成的青铜合金。剑身的黑色菱形花纹是经过硫化处理的，剑刃的精磨技艺水平可同现代在精密磨床上生产出的产品相媲美。因剑的各个部位作用不同，因此铜和锡的比例不一。

　　剑脊含铜较多，能使剑韧性好，不易折断；而越王勾践剑青铜合金配比刃部含锡高，硬度大，使剑非常锋利；花纹处含硫高，硫化铜可以防止锈蚀，以保持花纹的艳丽。

　　通过进一步的研究发现，“越王勾践剑”千年不锈的原因在于剑身上被镀上了一层含铬的金属。大家知道，铬是一种极耐腐蚀的稀有金属，地球岩石中含铬量很低，提取十分不易。再者，铬还是一种耐高温的金属，它的熔点大约在4000℃。

　　此外，越王勾践剑出土时紧插于黑漆木制剑鞘内，在剑鞘的保护下，又处于含氧量甚少的中性土层中；并且它所处的环境与外界基本隔绝，这也是它没有生锈的重要原因。

　　这把越王剑，无论从它的外形研制，还是质料搭配，都无疑是我国青铜短兵器中罕见的珍品。中华文明中曾有过太多的秘密，现代的科学发明，竟会出现在2400多年以前，在我们禁不住赞叹的同时，也不得不敬佩祖先的智慧。（选自《探索·发现》2006年第5期）

1、这篇文章说明的中心是什么？

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2、科学家们对2400年后越王古剑仍能保持原状的原因进行了检测，检测的结果主要有哪三个原因？请简要概括。

①____________________________________________

②____________________________________________

③____________________________________________

3、文章第2段主要用了什么说明方法？试举一例分析其作用。

①说明方法：__________________________________

②举例分析：__________________________________

4、文章最后一段，“无论从它的外形研制，还是质料搭配，都无疑是我国青铜短兵器中罕见的珍品”，其中的“罕见”一词能否去掉？为什么？

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