AI（人工智能）products are not new. However, resear...

AI（人工智能）products are not new. However, researchers have been working to improve the technology. Now virtual（虚拟的）assistants, like Siri and Alexa, can have short conversations with us. AlphaGo taught itself to play Go and became better than the top human players.

Now an AI system （系统）has been tasked with passing a multiple-choice （多项选择） exam. The goal is to improve machines' language understanding and logic（逻辑）with so-called computer vision（视觉）.

A system named Aristo was developed by the Allen Institute for AI, a lab in the United States city of Seattle. It recently passed an eighth-grade science exam taken by many US students. The New York Times reported. It correctly answered more than 90 percent of the questions. Then it was given a twelfth-grade exam, it scored more than 80 percent.

It's an example of the progress in AI development. Four years ago, 700 computer scientists tried to develop AI systems that could pass these kinds of exams. None scored higher than 60 percent.

Aristo was able to pass the exams because it can not only understand language but also use logical thinking to solve difficult problems. For example, it can understand what a forest fire is and how it could endanger animals like squirrels or make the food supply they need less.

The system used BERT, a kind of neural （神经的）network technology developed by Google, to answer the questions. BERT has "read" thousands of English articles. If it looks at a sentence with a missing word, it can correctly guess what the word is. With BERT’ s help. Aristo "read" many multiple-choice questions and answers. Over time, it was able to find logical patterns on its own.

It may still be in the earliest stages, said Jingjing Liu, a Microsoft researcher who has been working on similar technologies. “We can't compare this technology to real human students and their ability to reason."

However, Aristo's success means that Al systems are getting better at understanding users, and we might see improved search engines and hospital databases （数据库）in the near future.

1.Why did scientists develop Aristo?

A.To make better multiple-choice exams.

B.To improve AI's ability to teach itself.

C.To shorten the time AI needs to "read" information.

D.To improve the language understanding and logic of AI.

2.What can we know about Aristo from its exam results?

A.It was smarter than most US students.

B.It could only deal with science questions.

C.It was best at understanding English.

D.It did better than other AI systems in similar tasks.

3.The sixth paragraph mainly talks about how__________　　 .

A.Aristo teaches itself B.Aristo reads English articles

C.Google developed BERT D.difficult it was to design Aristo

4.What can be learned from Jingjing Liu's words?

A.AI will soon take the place of humans in many tasks.

B.Aristo still cannot compare to human reasoning skills.

C.Humans can't live without Al in the future.

D.Aristo can score more than 80 percent in a twelfth-grade exam.

九年级英语阅读单选简单题查看答案及解析

FUN WITH COOKIE

Paul: “I have been working for this company for ten years, however they chose the new guy for promotion (升职) over me.”

Julia: “Well, that’s just the way the cookie breaks into pieces.”

This is an informal expression that means bad things happen in life and there is nothing you can really do to prevent it. It’s not worth getting sad; you should just try and accept it calmly.

Of course in the UK we would generally use the word “biscuit” instead of cookie when talking about those hard baked, sweet, flat cakes which are so popularly eaten with a cup of tea. Cookie is originally a Dutch term meaning little cake and has spread to the United States because of immigration (移民) from Holland.

Also in the US we can find “fortune cookies” which are usually served with Chinese food. However they are almost unknown in mainland China and were invented in California by Asian immigrants. They are crisp cookies with pieces of paper inside, on which are written clever sayings, prophecies (预言) or words of wisdom.

A Cookie in computing is a collection of information which is used by websites to know users who have visited the site before. They are stored on your computer when you use the Internet, and also you will find the websites you used easily.

A cookie can also be a person. A tough cookie is unemotional (冷漠的) and a hard businessman while a smart cookie is sharp, clever and not easily fooled.

Biscuit and cookie is just one example of the difference between British and American words.

九年级英语填空困难题查看答案及解析

When we are in a new place, maps help us find our way easily. However, different types of maps have different uses.

Tourist maps, for example, have signs to show places of interest in an area. When tourists read these maps, it’s easy for them to find where to go and what to see in a place.

Road maps show large areas so that people can plan long journeys. Different types of roads are given different numbers. For example, if you want to go to the zoo, you just follow one number of the road and keep looking at the road signs.

Distribution（分布）maps use colors or signs to show facts about an area. For example, how many people live in an area, how cold and hot some places are, or whether a place is short of water.

Railway maps, use straight lines to show everything. This is easy for people to read. Trains are fast. People don’t have to think about small places they go past. They just need to know the two ends of their trips.

1.People can plan long journeys with the help of _______.

A. road maps                    B. distribution maps            　　 C. tourist maps

2.Railway maps use ________ to show everything.

A. different numbers            B. straight lines            　　 C. road signs

3.We learn from the passage that ________ is a tourist map.

4.Distribution maps can tell us _________ .

A. which place is short of water

B. how to get to Germany

C. where a museum is

5.The passage is mainly about the _________ of maps.

A. value                        B. history                        C. types

九年级英语阅读理解困难题查看答案及解析

The iPhone has been called a magical product because of its success over the years. However, now the iPhone seems to have lost its attraction.

Tim Cook, CEO of Apple, said in a recent letter that the company expected a revenue（收入）of $84 billion for the first fiscal quarter（财政季度）of 2019. It was much lower than the earliest expectation of between $89 billion and $93 billion. That was the first time that Apple had seen its revenue expectation fall in almost twenty years.

Cook explained that the fall was mainly because of the less growing need in China.

However, people believe that Apple itself is mainly responsible（有责任的）for the fall. Gene Munster told CNN that “one-third of the problem” comes from the company’s move to suddenly increase the price.

This has made people less willing to change the latest iPhones. For example, iPhone Xs Max, one of the company’s latest smartphones, costs $1450 in the US, and costs much more in other countries, including many developing countries, reported Forbes.

Apple has also failed to introduce features that excite people in a forward-thinking technology market, reported CNBC.

Meanwhile, Apple also faces challenges from smartphone makers in China such as Huawei and Xiaomi, which have introduced less expensive but still quality smartphones.

For example, in 2018, Huawei introduced a triple-lens camera（三摄镜头）on its P20 Pro. The triple-lens camera is a popular feature that the iPhone doesn’t have, according to CNBC.

“In the past few years, the technology in Apple’s phones has not had any big improvements, while the technology in smartphones made in China has got better and better ,” Feng Yin, a 32-year-old engineer in China, told The New York Times. “The difference is getting smaller.”

九年级英语填空中等难度题查看答案及解析

—Have you moved into the new flat?

—Not yet. The room _________.

A. has been painted    B. is painted

C. is being painted    D. was painted

九年级英语单项填空中等难度题查看答案及解析

People have been interested in robots for quite some time. Scientists are always inventing new and better robots. It is known that robots p　 1.　　 an important role in our lives.

First of all, in real life, robots are m　 2.　 used in factories. They do many different jobs. They always do all the d　 3.　　 , difficult and heavy work, and help out in h　 4.　　 , schools and offices. The use of robots can i　 5.　　 the working conditions for people.

Secondly, smarter robots will help us w 6.　　 the housework. They can do jobs such as preparing meals, washing dishes, s　 7.　 the floor. Therefore, we will have more time to do w 8.　　 we want to do.

Thirdly, robots will be our f　 9.　　 . When we feel sad, lonely or happy, we can have a chat with a robot. Robots will not only be good listeners but also offer us good a 10.　 .

In a word, robots will be more and more intelligent (聪明) and affect our lives in many ways.

九年级英语单词拼写困难题查看答案及解析

Not only you but also he ______ to my birthday party.

A.have been invited　　　　　　　 B.has been invited

C.are invited　　　　　　　　　　　 D.invited

九年级英语单项填空中等难度题查看答案及解析

Not only you but also he ________ to my birthday party.

A. have been invited　　　 B. has been invited

C.are invited　　 　　　　 D.invited

九年级英语单项填空简单题查看答案及解析

—Are you new here?

—No. I have _________here for 2 years.

A.been to B.got C.come D.stayed

九年级英语单选题中等难度题查看答案及解析

A lot of new houses　 _____　 in this large open area in the past five years.

A. are built B. have been built C. were built .... D. will be built

九年级英语单选题中等难度题查看答案及解析