The first photo of a black hole was shown to ...

The first photo of a black hole was shown to the whole world ______ April, 2019. We are now closer to solving the basic questions about universe.

A.in B.on C.at D.for

九年级英语单选题简单题查看答案及解析

(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

Neil Armstrong is the first man to walk on the moon. He is the ________ (骄傲) of the whole world.

九年级英语根据中/英文提示填空中等难度题查看答案及解析

—A photo of black hole appeared on the Internet a few weeks ago.

—Yes, but I wonder _____________in the future.

A.what it will become larger B.if it will become larger

C.that will it become larger D.whether will it become larger

九年级英语单选题中等难度题查看答案及解析

A well—made film offers a whole world of things to watch. First there are the story aspects, the plot, c1. , dialogue and themes. Then there are the technical aspects —the camera work, cuttings and special effects.　 And there are many other things, 12.the credits, musical score and the acting. A well—made film o3.much more than you see in one viewing. Films are a means of communication. They can tell you things, just as newspapers do, or, television, or any other means of communication. Sometimes they communicate important things to you, like ideas or lifestyles or w4.of looking at the world. Sometimes people are aware of this, and sometimes not. The more you are aware of this, the b5.you are. Notice, for example, the way films sometimes affect fashion. A star dresses or wears her hair in a certain way, and s6.everyone is imitating her. Films can also teach politics. In Star Wars, the heroes were a bunch of lovable incompetents fighting with guts（胆量）and not much else. The whole film，in fact，t7.values like faith and love of liberty. This is all to the good，but the point is，did you notice it？

九年级英语单词填空中等难度题查看答案及解析

根据短文内容及首字母提示，填写所缺单词。

Trying to take a picture of a black hole is like trying to take a photo of an orange sitting on the surface of Moon from Earth— with your mobile phone.

That is what Dr. Katie Bouman said two years ago during a talk c__________ “How to take a picture of a black hole.”

Bouman is 29 years old. She and o__________ scientists produced a black hole picture from data(数据) collected　 from a series of telescopes(望远镜) around the world. They worked together to form an Earth-sized telescope—one powerful enough to do what seemed i_________ in the past.

Last month, the team of scientists showed the p__________ the first picture of a black hole. Soon after, another picture was spreading over social media and the news. It showed a smiling Bouman with the black hole picture on her computer screen. She led a team to help create a program that t______the huge amount of telescopic data into one picture. She q______ became a symbol for women in science.

A university student who recently completed her studies in engineering said, “So many young girls will consider Dr. Katie Bouman as a h__________ and go on to make their own discoveries in space, physics, and computer science. A historic moment is not only for science,b__________ for women in science.”

But Bouman h__________ said that she was not the only one who achieved this great success. She said, “No one made this picture. It required the amazing talent of a team of scientists from around the world. Also, it needed years of hard w__________.”

Bouman will begin her teaching career at a university later this year.

1.c________

2.o________

3.i________

4.p________

5.t_____

6.q________

7.h________

8.b________

9.h________

10.w________

九年级英语单词填空困难题查看答案及解析

Daniel sat in the back of the car and he was very happy.It was his first trip to Disney World，and he couldn't wait to get there.

At first it wasn't too bad.He played some card games with his brother Emmit and his mother.They played number games.They also read interesting books.Then Daniel felt bored and slept.But he didn't sleep for a long time，and they were still far away from Disney World.“Are we…”

“No，Daniel，” said his father.“Please try to be patient．You chose the vacation place this year.We told you it would be a long trip.”

“Yeah，but this is so boring！” said Daniel.

“I think Daniel is right，” said Emmit.“It's a boring trip.”

“You want to hear about a boring trip？” asked Dad.“When I was about your age，Daniel，Grandma and Grandpa took your aunt Jane and me to Disney World.On the way there，the car didn't work.Luckily your grandpa could repair the car，but it took a long time to repair it.So when we arrived at Disney World，it was already dark.”

1.How did Daniel feel when the trip just started?

A. Bored.　　 B. Happy.　　 C. Bad.　　 D. Tired.

2.What didn't Daniel do on the trip?

A. Reading books.　　 B. Sleeping.　　 C. Playing number games.　　 D. Listening to music.

3.What does the underlined word “patient” mean in Chinese?

A. 耐心的　　 B. 烦躁的　　 C. 焦虑的　　 D. 匆忙的

4.What can we learn from the passage?

A. There were four people in the car.

B. It was Daniel's father's first trip to Disney World.

C. Daniel wasn't happy because their car didn't work.

D. Daniel's grandma could repair cars.

5.What is the best title for this passage?

A. Two Different Trips　　 B. Interesting Number Games

C. A Boring Trip　　 D. A Visit to Disney World

九年级英语阅读单选困难题查看答案及解析

On April 26, 2017, a big Chinese ship caught the eyes of the whole world. China’s first homemade aircraft carrier(航空母舰) hit the water in Dalian, Liaoning.

The new big ship is China’s second aircraft carrier. It was designed(设计) in China and built in China, too. It is about 315 meters long and 75 meters wide. That is a bit larger than three soccer fields.

An aircraft carrier is like an airport on the sea. It can carry planes and troops(军队) to war. Planes fly from the carrier and land back on it, and soldiers work and live on it, too. But building an aircraft carrier is so hard and expensive. It costs a lot of money and needs a large amount of steel and other special materials. For example, a basic aircraft carrier is made of 60,000 tons of steel. It also uses complex(复杂的) technologies. Finally, it takes years to build one. Today, not many countries own an aircraft carrier or have the ability to build one. China has become the seventh country in the world that can build an aircraft carrier by itself after the USA, Russia, England, France, Italy and Spain.

1.Which of the following is wrong about the aircraft carrier?

A.It costs a lot of money. B.It uses complex technologies.

C.It is as large as a soccer field. D.It can carry planes and troops to war.

2.How many countries can build an aircraft carrier by itself according to the passage?

A.One. B.Two. C.Six. D.Seven.

3.What can we know from the passage?

A.Many planes are made in Liaoning.

B.The world needs more aircraft carriers.

C.Italy bought an aircraft carrier from other country.

D.China has owned its first homemade aircraft carrier.

九年级英语阅读单选中等难度题查看答案及解析

On April 26, a big Chinese ship caught the eye of the whole world. China's first homemade aircraft carrier(航空母舰)hit the water in Dalian, Liaoning. It is the largest and best ship China has ever built, according to China Daily.

The new ship is China's second aircraft carrier and it has no name yet. China's first aircraft carrier is called Liaoning, which was bought from Ukraine and later rebuilt by China.

The new aircraft carrier was designed in China and the building began in 2013.The ship now must be completed at sea.

An aircraft carrier is like an airport on the sea. It can carry hundreds of planes and troops to wars. Planes fly from and land back on it, and soldiers work and live on it. Thanks to aircraft carrier, planes can fight along with warships. They allow planes to take off and land from anywhere in the ocean around the world.

But an aircraft carrier is very hard and expensive to build. It costs a lot of money and uses a large amount of steel and other special materials. For example, a basic aircraft carrier is made of 60, 000 tons of steel! It also uses complex(综合的) technologies including radar, electricity, mechanics and weapons. Finally, it takes years to build it.

Today, not many countries own an aircraft carrier or have the ability to build one. When the new aircraft carrier is finished, China will become the seventh country in the world that can build an aircraft carrier by itself, after the US, Russia, UK, France, Italy and Spain, according to China Daily.

1.Which of the following is TRUE about China's new aircraft carrier?

A.It is China's first aircraft carrier. B.It is called Liaoning.

C.It was designed in China. D.It was bought from Russia.

2.What is the main idea of the fourth paragraph?

A.What an aircraft carrier is.

B.The similarities between an aircraft carrier and an airport.

C.A new place for planes to take off and land on.

D.A secret weapon for wars.

3.What does the underlined word "troops" mean?

A.Warships. B.Soldiers. C.Materials. D.Technologies.

4.What can we learn from the story?

A.China has already got seven aircraft carriers. B.China can't make its own aircraft carrier.

C.Building an aircraft carrier is not an easy job. D.Many countries own aircraft carriers in the world.

九年级英语阅读单选困难题查看答案及解析

A company says it has completed the first 3D-printed home recently. The home was shown to reporters and visitors at a music festival.

The building company has developed large 3D- printers that build homes with mortar, a hard and strong

material.　 It　 uses　 robotics,　 computer　 programs　 and　 advanced　 materials　 to　 make houses.

Jason Ballard is the company's chief engineer. "So I'm standing in front of the first 3D-printed home in America. This house was actually printed in high winds, blowing dust and rain." It is important for the printing programmes to operate in bad weather conditions, such as weather disasters. The goal is to print homes in developing　 countries. So the printer has to be light enough to move from one property to the next.

Ballard imagines that someday, many 3D-printers will operate around the world to make homes. "It's actually a lot more simple to build a printer than it is to build a house," he said. "We ran this printer at about a quarter speed to print this house, and completed it in about 48 hours of print time."

The company developed this technology not to make money but to help provide a quick, cheap housing solution for the millions of people who need it most. There are about a billion people that don't have one of life's most basic human needs, and that's safe shelter.

Ballard says his company already works on housing needs with poor families in different areas. But he says that to really make a difference, the program will need to be greatly improved. He added that since the 3D-printing process is so much faster than traditional homebuilding, a whole community could be built in just a few months. He believes over time, people can get the new home below $4,000 with the help of 3D-printers.

1.What kind of building material can be used in 3-D printing according to the passage?

A. light but strong　　 B. light and soft.

C. strong but expensive　　 D. hard and strong.

2.What is the meaning of the underlined word　 property in Paragraph 3?

A. land for farming　　 B. land for building houses

C. land for raising animals　　 D. land for running companies

3.It will take about　　　　 hours to print a house if the printer is at its full speed.

A. 12　　 B. 24　　 C. 36　　 D. 48

4.What is the best title for this passage?

A. The Future of 3D-printing　　 B. The History of 3D-printing

C. The New Use of 3D-printing　　 D. The Instructions of 3D-printing

九年级英语阅读单选困难题查看答案及解析