问题 选择题

甲图是一氧化碳还原氧化铁的装置,乙图是炼铁高炉示意图。下列叙述中正确的是

A.乙图所示的炼铁中原料焦炭的作用是只提供热量

B.两图所示的实验和生产过程中都发生的反应是:3CO+Fe2O3高温2Fe + 3CO2

C.甲图所示的实验中开始时应先点燃酒精喷灯,后通CO

D.用两图所示的方法得到的铁的成份完全相同

答案

 

题目分析:A选项乙图所示的炼铁中原料焦炭的作用是即提供热量又产生还原剂一氧化碳;B选项两图所示的实验和生产过程中都发生的反应是:3CO+Fe2O3高温2Fe + 3CO2是正确的叙述;C选项甲图所示的实验中开始时应先通CO,后点燃酒精喷灯;D选项用两图所示的方法得到的铁的成份完全相同,是错误的叙述,甲中得到的铁较纯净;故答案选择B

阅读理解

We use the Internet for many things: business, shopping, writing letters, talking to people, finding information, and so on. In recent years, a new kind of English has grown on the Internet. There’s no real word for it yet, so we’ll call it e-talk. People don’t like typing too much. To save time, they turn phrases (短语) into a few letters called acronyms(首字母缩略词). Acronyms are often used in chat rooms.

Some of them are:

BTW(by the way)     BRB (be right back)

LOL (laughing out loud) IMO (in my opinion)

People also use many abbreviations. They are shortened forms of words. Some common abbreviations are:

info (information)    puter (computer)    pic (picture)      sec (second)

We usually don’t see people when we communicate on the Net, so people have new ways to show feelings. Most people use their keyboards to draw “feeling”, such as:

: ) (happy)     :-( (sad) ;    : P (joking)   : O (surprised)

These days, many forums have picture feelings. For example:

happy          sad         angry        cool

There are even whole new words, like ‘newbie’ (someone who is new on a chat board or forum). When you write something bad about someone else, it’s called ‘flaming’ the person.

It takes time to get used to e-talk. Also, different groups in the Net have their own special ways of communicating. Newbies sometimes have to ask other people what they mean. As the Internet grows, e-talk will continue to grow and change.

小题1: Why do people type acronyms?

A.To show their feelings.

B.To make jokes.

C.Because people can type them quickly.

D.In this way, newbies won’t understand them.小题2:What does “My puter is not working well. :-( ” mean?

A.The person is happy about getting a new computer.

B.The person has to go away from their computer.

C.The person is angry at somebody.

D.The person is sad that his computer is having problems.小题3:If someone is angry, what may he type?

A.

B.

C.LOL

D.BRB小题4:E-talk will probably_________.

A.keep changing

B.stay the same

C.be used by people on the telephone

D.be easy for newbies to understand小题5:People can do the following through the Internet except _________.

A. doing shopping                B. writing diaries

C. eating foods                   C. playing games

单项选择题