The colour systems (系统) used by scientists and artists are completely di
题型:期末题难度:来源:
The colour systems (系统) used by scientists and artists are completely different. An artist will mix blue and yellow paint to get a shade of green; a scientist will mix green and red light to create yellow. The printed page in a magazine is yet another system. Scientists recognize the light primaries (原色) are red, green and blue. When mixed, red and green light rays produce yellow, blue and green produce cyan, red and blue produce magenta. Red, green and blue mix to create white (light). This colour model is used in computer monitors, television sets and theater. Most artists recognize red, yellow and blue as the three basic primary colours. These primaries are the pure colours which can not be created by mixing any other colours. In the print industry, cyan, magenta, yellow and black are used as the primary colours. When you mix all the colours, the result is gray. |
1. __________ on the colour systems. |
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A. Scientists and artists have the same idea B. Scientists agree with artists C. Scientists and artists have different ideas D. Some of their ideas are the same |
2. How many colour systems are mentioned in the passage? |
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A. Two. B. Three. C. Only one. D. Four. |
答案
1-4 C B C B |
举一反三
根据短文内容及首字母提示在空白处填上适当的单词,使短文意思完整。 |
Airplanes are the newest kind of transportation. From early times, people tried to f 1 through the sky like birds. About 100 years a 2 , someone took the first ride on an airplane. This ride lasted for less than one m 3 . These first planes were very s 4 , too. Only one o 5 two people could fly in them at one time. Today these p 6 are very big and fast. H 7 of people can travel in them at one time. W 8 them, people can get f 9 one side of the United States to the other in less than one day. Traveling is very d 10 from the way it was 100 years ago. 1._____ 2._____ 3._____ 4._____ 5._____ 6._____ 7._____ 8._____ 9._____ 10._____ |
完形填空。 |
A good dictionary is 1 important tool (工具). It will tell you 2 only what a word means but 3 how it 4 . A dictionary needs to be printed again about every ten years. Languages develop (发展) and a good dictionary must 5 these new changes. A new English dictionary will only tell you 6 most people use the language today. It will not tell you what is right 7 wrong. It may tell you the right time to use a word. If only 8 people use a word, a dictionary will 9 tell you this or not list (编列) it. 10 dictionary will tell you many interesting facts. If you type (用打字机打) a word and the word is too long, 11 in your dictionary. All dictionaries show you 12 to break (拆开) a word. And they also show you how a word 13 . Every dictionary, of course, tells you what a word means. But some words, like "get" or "take", may have lots of meanings (意思). In some dictionaries, the main (主要的) meanings are often listed first. In 14 , the newest meanings are listed last. So before you use your dictionary, you should always 15 the front part. This part explains 16 . Some dictionaries also show you where a word comes 17 . Do you know that the word "brand" (标记) comes from an old word? This old word means "to burn". This is because 18 years ago people burned their names on tables or boats to show who 19 them. They also burned their own names on their farm animals 20 they would not be stolen. Your dictionary also has a lot of other interesting facts in it. After you have learned to use a dictionary, it can become your best useful book. |
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 into a few letters called acronyms (首字母缩略词). Acronyms are often used in chat rooms and forums. 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 their emotions. Most people use their keyboards to draw "emoticons",such as: :-) (happy) :-( (sad) ;-) ( joking) :-o (surprised) These days, many forums have picture emoticons. 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. |
1. Why do people type acronyms ? |
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A. Because people wanted to show their emotions. B. Because people can type them quickly. C. Because people wanted to make jokes. D. Because newbies won"t understand them. |
2. What does "My puter is not working well. :-( " mean? |
[ ] |
任务型阅读,阅读短文,按要求完成各题。 |
A volunteer is someone who offers to perform a service out of his own will, often without payment. The year 2001 wasthe International Year of the Volunteer. 2005 was the UK Year of the Volunteer. Some volunteer for clinical trails (临床试验) or other medical research. Some may even donate their bodies to scientific research after their death. An online volunteer is a person who spends time and effort with an organization through an online connection, rather than in person. A great number of people from around the world are online volunteers. Online volunteers can provide help in many fields. The practice of offering online help goes by other names. (A)There are many opportunities for people to donate their services using the internet. (B) Online volunteers can do different kinds of tasks. Young or old, anyone can spend his spare time online offering some help as an online volunteer. Are you ready to be an online volunteer? 1. What is a volunteer? 2. Where may some donate their bodies to after their death? 3. How can an online volunteer work? 4. 写出(A)句的同义句。 5. 将(B)句改为被动语态。 |
阅读短文,回答下列问题。 |
What is color? Why do some of the things around us look red, some green, others blue? Colors are really made by reflected (反射) light. We see color because most of the things reflect light. In the same way, if something is green, it reflects most of the green light. If something reflects all light, it is white. If it doesn"t reflect any light, it is black. Some of the light is reflected and some is taken in (吸引) and turned into (变成) heat (热能).The darker the color is, the less light is reflected, the more light is taken in. So dark-colored clothes are warmer in the sun than light-colored clothes. |
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