问题 选择题

下面是两个人的血液检验结果,这两个人可能的病症是(  )

①贫血  ②遗传病③扁桃体炎  ④缺钙.

A.①②

B.①③

C.②③

D.②④

答案

血液中的三种血细胞是红细胞、白细胞和血小板.红细胞的功能主要是运输氧气;多细胞具有防御疾病的作用;血小板具有止血和加速凝血的作用.红细胞过少或其中的血红蛋白过少时会患贫血,白细胞过多说明有炎症,血小板过少会止血困难.通过分析图中数据可知第一个女性红细胞数量为3.×1012个/L,正常值为:(3.5~5.0)×1012个/L,低于正常值,所以可以判断第一个女性可能患有①贫血.第二个男女性白细胞1.8×1010个/升,正常值为:(4~10)×109个/升,高于正常值,因此,第二个女性可能有炎症,故可能患有③扁桃体炎.

故选B

改错题
阅读理解

阅读理解。

     Computer programmer David Jones earns $35.000 a year designing new computer games, yet he cannot

find a bank ready to let him have a credit card (信用卡). Instead he has been told to wait another two years

until he is 18. The 16-year-old works for a small firm in Liverpool where the problem of most young people

of his age is finding a job. David's firm releases (推出) two new games for the fast growing computer market

each month

     But David's biggest headache is what to do with his money. Even though he earns a lot he cannot drive a

car take out a mortgage (抵押贷款), or get credit cards. David got his job with the Liverpool-based company

four months ago, a year after leaving school with six O-levels and working for a time in a computer shop "I got

the job because the people who run the firm knew I had already written some programs" he said. David spends

some of his money on records and clothes and gives his mother 50 pounds a week. But most of his spare time

is spent working

     "Unfortunately, computing was not part of our studies at school" he said "But I had been studying it in books

and magazines for four years in my spare time. I knew what I wanted to do and never considered staying on

at school. Most people in this business are fairly young, anyway" David added:"I would like to earn a million and

I suppose early retirement (退休) is a possibility. You never know when the market might disappear."

1. In what way is David different from people of his age?

A. He often goes out with friends

B. He lives with his mother

C. He has a handsome income

D. He graduated with six O-levels

2. What is one of the problems that David is facing now?

A. He is too young to get a credit card

B. He has no time to learn driving

C. He has very little spare time

D. He will soon lose his job

3. Why was David able to get the job in the company?

A. He had done well in all his exams

B. He had written some computer programs

C. He was good at playing computer games

D. He had learnt to use computers at school

4. Why did David decide to leave school and start working?

A. He received lots of job offers

B. He was eager to help his mother

C. He lost interest in school studies

D. He wanted to earn his own living