Have you ever noticed the black and white bar...

Have you ever noticed the black and white bars on a book？Do you know what they are used for?

They are bar-codes（条形码）used in most products. If you go to a supermarket，you can see almost every product with a bar-code on it. Bar-codes have information about the product, such as name and production date.It's an easy and convenient way to know about the products. Just scan the bar-code and everything is clear.

The first use of a bar-code in a supermarket checkout system was on a pack of American Wrigley Company chewing gum in 1974.Beyond supermarkets, bar-codes are needed everywhere:for renting cars, for luggage checks on a plane, for parcels(包裹) you send. Life would be rather difficult without bar-codes.Most of our things would get lost in the post.

Bar-codes change as well.Bar-codes in the past were 1-D(one-dimensional空间), but now there are 2-D bar-codes,such as QR code.Since 2009, QR has been used on Chinese train tickets. People can enter stadiums,cinemas and theaters by holding certain types of bar-codes.

With these small codes, life is getting much easier for us.

If you find these bar-code things boring, a bar-code building might be more up your street. In St Petersburg, Russia, there is a building designed like a bar-code.It looks strange, but it's actually a shopping mall. There are games too. Bar-code Monsters is a mobile phone game. You have to scan bar-codes and find the monsters!

1.Bar-codes were first used in ________.

A.1974 in the UK B.1974 in the US C.2009 in China D.2009 in Russia

2.The underlined word “scan”might mean “________” in Chinese.

A.复印 B.展示 C.描写 D.扫描

3.From Paragraph 3 and 4, we can learn that ________.

A.bar-codes are very useful in our daily life B.our things will get lost without bar-codes

C.bar-codes make our life rather difficult D.we can’t live without bar-codes

4.Which of the following is NOT true about the bar-code building?

A.It looks like a bar-code. B.It’s in St Petersburg, Russia.

C.It’s used as a shopping mall. D.Its name is Bar-code Monsters.

5.The best title of this passage is________.

A.From 1-D Bar-codes to 2-D Bar-codes B.Why Bar-codes are Black and White

C.Small Codes that Make a Big Difference D.What if the World Doesn’t Have a Bar-code

九年级英语阅读单选中等难度题查看答案及解析

Have you ever noticed that you’re treated differently in stores based on your sex，age，race(种族)and even the way you dress? I certainly have，so 1 wanted to see exactly what happens inside these stores that are meant to be run with“customer(顾客)service”．

A young man in ripped jeans and a hoodie went into a car shop and asked for a price on the top of the line vehicle．The salesman looked him up and down and said．“I don’t think you can afford a　 car like this．Have a look at the　 inferior　 cars over here.”

As you can imagine，the young man was angry and left the showroom．Two days later, the

young man walked back in，and he walked up to the salesman who had served him two days before and asked，“Hi，do you remember me? You said l should look at the inferior cars the other day．”The salesman nodded and said yes．

The young man then asked him to just quickly come outside and have a look at something．

They walked out and the young man pointed to the brand—new top of the line Ford and said．“I paid with cash(现金)，do you like my new car?”And then the salesman quickly left．

Maybe many businesses don’t understand a fact—if they don’t treat their customers equally,they will lose business．Not every one of the above people will ever go back to those companies and they won’t recommend them to anyone．You will not only lose repeat business but also lose up to 10 customers，for every person you treat badly will not recommend your companies and will tell people not to go to these places．

1.What fact does the writer mainly tell us about treatment in the passage?

A．Everyone is treated equally in their life．

B．Many people are treated unequally in their life．

C．People don’t need to be treated equally in their life．

D．People need society to provide an equal environment．

2.What does the underlined word“inferior”mean in Chinese?

A．高级的　　 B．崭新的　　 C．下等的　　 D．二手的

3.Which of the following is TRUE according to the passage?

A．The young man in brand．new jeans and a hoodie entered the showroom．

B．All the people treated badly will go back to complain about the service．

C．The salesman left quickly because he felt very embarrassed(尴尬的)．

D．If customers are treated equally, companies will lose repeat business．

4.Which of the English sayings can we get after reading the passage?

A．Love me love my dog．

B．A miss is as good as a mile．

C．A clean hand wants no washing．

D．Never judge from appearance．

九年级英语阅读理解中等难度题查看答案及解析

(C).阅读与回答问题。

Have you seen this photo yet? This is the first— ever image of a black hole. On April 10, people around the world got their first look at a real black hole. Scientists say it is a landmark(里程碑) in the history of science.

The image shows a black hole with a bright ring around it. The black hole lies in a galaxy(星系) named Messier 87 which is about 55 million light— years from earth. Scientists say that the image proves that black holes are real. It also supports Einstein’s theory of general relativity(广义相对论).

The image is fuzzy ( 模糊的). Scientists said it might be possible to make the image sharper by using algorithms(计算机算法). They are also working on taking pictures of other black holes.

More than 200 astronomers helped to capture ( 捕 捉 ) the image, including 16 from we Chinese mainland.

回答下面问题, 每个答案不超过 5 个单词。

1.When did people got their first look at a real black hole?

_______________________________________________________________________________

2.What is around the black hole?

_______________________________________________________________________________

3.Which galaxy does the black hole lie in?

_______________________________________________________________________________

4.How can scientists make the image sharper?

_______________________________________________________________________________

5.How many astronomers helped to capture the image?

_______________________________________________________________________________

九年级英语回答问题中等难度题查看答案及解析

Boys and girls, have you ever read the book The Adventures of a Plastic Bottle？It's written _____ Alison Inches, a _____(success)children's book author.

This is a great diary story about _____(recycle), told from the point of view of a plastic bottle. It _____(describe)the life of the plastic bottle from the factory to the store shelf, then to the rubbish bin and _____(final)to a recycling centre where it starts a new life as a jacket.

This book is both humorous _____ educational. It creates a sweet journey for its young readers _____(follow)and enjoy. It teaches us that recycling is not only good _____ the environment, but also gives something that seems not so _____(value)a change to be something else entirely. Read the book ______ you haven't read it. And you will never look at a plastic bottle the same way again!

1.________

2.________

3.________

4.________

5.________

6.________

7.________

8.________

9.________

10.________

九年级英语语法填空中等难度题查看答案及解析

— Have you ever read the book called My Country and My People?

— Yes. It was written by Lin Yutang. His humorous writing style in _______ Chinese _______ English impresses me most.

A.either; or B.neither; nor C.not; but D.both; and

九年级英语单选题中等难度题查看答案及解析

— Have you ever read the book Harry Potter?

— Yes, and I think it’s very ____. I want to read it again.

A. boring　　 B. bored　 C. exciting　　 D. excited

九年级英语单项填空中等难度题查看答案及解析

— Have you ever read the book Harry Potter?

— Yes, and I think it’s very ____. I want to read it again.

A. boring　　 B. bored　 C. exciting　　 D. excited

九年级英语单项填空中等难度题查看答案及解析

--Have you ever road the book Harry Potter?

--Yes, and I think it's very ______. I want to read it again.

A. boring       B. exciting            C. bored             D. excited

九年级英语单项填空困难题查看答案及解析

—Have you ever read the book Harry Potter？

—Yes，and I think it’s very________．I want to read it again．

A．boring

B．exciting

C．bored

D．excited

九年级英语单项填空中等难度题查看答案及解析

We have bags ______ white，black and red ______ only ￥5.

A. at；for　　 B. in；for　　 C. for；in　　 D. in；on

九年级英语单选题中等难度题查看答案及解析