By the end of 2025, garbage-sorting systems （垃圾分类系统） will be ________ in Dongying.
A.set up B.given up C.shut off D.brought out
九年级英语单选题简单题
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 theatre.
Most artists recognize red, yellow and blue as the three basic primary colours. These primaries are the pure colours which cannot 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. How many colour systems are mentioned in the passage?
A. Two B. Three C. Only one D. Four
2.If an artist wants to get green, he must _______ .
A . mix blue and yellow
B. mix blue and red
C. mix red and yellow
D. mix red, yellow and blue
3.Which of the following is NOT true?
A. Red, green and blue are used in television sets.
B. If scientists want to get white, they will mix red, yellow and blue.
C. Most artists think red, yellow and blue are the pure colours.
D. In the print industry, if you mix all the colours, you will get gray.
九年级英语阅读理解中等难度题查看答案及解析
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.
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?
A. Two. B. Three.
C. Only one. D. Four.
3.hich of the following is NOT true?
A. Red, green and blue are used in television sets.
B. If scientists want to get white, they will mix red, yellow and blue together.
C. Most artists think red, yellow and blue are the pure colours.
D. In the print industry, if you mix all the colors, you will get gray.
九年级英语阅读理解中等难度题查看答案及解析
The third line of Zhengzhou Subway by the end of December of 2020.
A. will complete B. was completed C. is completing D. will be completed
九年级英语单选题中等难度题查看答案及解析
People in Urumqi are glad that Subway Line One by the end of the year 2017.
A. will complete B. will be completed
C. has completed D. is completed
九年级英语单选题中等难度题查看答案及解析
By the end of last month, I half of the project.
A. finished B. have finished
C. had finished D. will finish
九年级英语单项填空中等难度题查看答案及解析
Go along the road then you will see a cinema ___________the road.
A. in the end of B. by the end of
C. at the end of D. in the end
九年级英语单选题中等难度题查看答案及解析
阅读短文，并根据短文内容回答所提问题。
Shanghai started a new garbage-sorting (垃圾分类)program in July this year. People are always asking“which is the right bin(垃圾箱) for my garbage?" They need to put different kinds of garbage into different bins. Other cities in China will do the same soon.
Why is garbage sorting a big problem?
It's because there is too much garbage these days. It's bad for our soil, air and water. Actually, we can make use of some garbage again. And first, we need to sort our garbage. For example, if you put an battery(电池) into the“harmful waste(有害垃圾)”bin, people can use it to make new batteries. But if you don't, the battery will be somewhere else. It will be bad for the environment. Many people may not know how to sort it in a right way. China's tech companies are working hard to solve this problem. For example, if you want to know which bin your milk box should go in, you can just open a mini app(小程序) in WeChat or Ali pay and look for“wet wipes". The app will give you the answer right away. Maybe you can just take a photo of the garbage and then you will know which bin you should put it into.
The future of garbage-sorting looks good. But it's not the best way. The best thing we can do is to make less garbage in the first place.
根据短文内容，回答问题。
1.When did the new garbage-sorting program start in Shanghai?
____________________________________ .
2.What do people need to do for this program?
_______________________________________ .
3.Why is garbage-sorting a big problem?
_______________________________________ .
4.Do all people know how to sort garbage in a right way?
_______________________________________ .
5.What is the best thing we can do ?
_______________________________________ .
九年级英语回答问题困难题查看答案及解析
By the end of 2012, many buildings built in our city.
A. have been B. have C. had been D. will
九年级英语单项填空中等难度题查看答案及解析
They________about eight hundred English words by the end of last term．
A．will learn
B．had learnt
C．are going to learn
D．have learnt
九年级英语单项填空中等难度题查看答案及解析
We________four thousand new words by the end of last year．
A．learned
B．had learned
C．have learned
D．will learn
九年级英语单项填空中等难度题查看答案及解析