Virtual (虚拟的) reality is a way to create a co...

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Virtual (虚拟的) reality is a way to create a computer-made environment that brings the user into a virtual world. If you ever have put on a VR headset, you would know exactly what I am talking about. From an experiential view we do understand the idea, but what about the technical backend that goes into making it all possible? In this blog, we will understand the technology behind virtual reality and the basic terms about the development of a virtual ecosystem for a VR headset.

The primary subject of virtual reality is simulating (模拟) the vision. Every headset is to perfect their method to create an immersive (浸入式) 3D environment. Each VR headset puts up a screen or two in front of eyes, keeping the user away from any interaction with the real world. Two autofocus lenses (自动对焦镜片) are generally placed between the screen and the eyes that change based on eye movement and positioning. The vision appears on the screen either by using a mobile phone or HDMI line connected to a PC.

To create a truly immersive virtual reality, there are certain requirements — a frame rate (帧率) of at least 60 fps, a refresh rate and at least 100-degree field of view ( though 180 degrees is perfect). If either of these doesn’t work according to the standards, the user will experience too big of a time difference between their actions and the response from the screen. We need the response to be less than 20 ms ( 1/1000 second) to fool the brain which is achieved by joining all the above in the right proportion (比例). Another matter that needs to be looked at here is to prevent netsickness because of the differences between the frame rate and refresh rate.

Apart from the image, there are certain other things that go into creating an immersive VR experience, holding the user’s attention completely in the virtual environment. For example, sound effects, when put with the image, can create very attractive effects. By using a headphone and 3D sound effects, the user can totally believe in the virtual environment. While perfecting sound effects, proper care needs to be taken about the consistency (一致) between the pictures and the sound. If you start playing frightening music in the background of a happy scene, it will just put the user off.

In future, we will see rapid progress in creating a truly immersive digital experience. With leading players like Google, Microsoft, Oculus, and HTC making great efforts to improve the capabilities (性能), we are not far from achieving a virtual reality that would feel so much better than the real world. If you would like to develop a VR app for your business, then feel free to get in touch. With over 10 years of experience in mobile technologies, we can make every dream a reality.

1.A VR headset helps the user _________.

A. create the vision on the screen

B. understand the technical backend

C. better experience a 3D environment

D. keep interaction with the real world

2.The words "put the user off" in Paragraph 4 probably mean "__________".

A. take the user’s attention away

B. get the user interested

C. hold the user’s imagination back

D. help the user understand

3.What is the main purpose of writing this passage?

A. To give a short introduction of VR.

B. To do business with certain readers.

C. To predict the bright future of VR.

D. To share experiences with readers.

4.What can we learn from the passage?

A. The lower degree field of view, the better images.

B. Sound effects are more important than the image for VR.

C. Some big companies may create a VR better than the real world soon.

D. The brain can tell the time difference when the response is more than 20 ms.

九年级英语阅读单选中等难度题

少年，再来一题如何？

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Virtual (虚拟的) reality is a way to create a computer-made environment that brings the user into a virtual world. If you ever have put on a VR headset, you would know exactly what I am talking about. From an experiential view we do understand the idea, but what about the technical backend that goes into making it all possible? In this blog, we will understand the technology behind virtual reality and the basic terms about the development of a virtual ecosystem for a VR headset.
The primary subject of virtual reality is simulating (模拟) the vision. Every headset is to perfect their method to create an immersive (浸入式) 3D environment. Each VR headset puts up a screen or two in front of eyes, keeping the user away from any interaction with the real world. Two autofocus lenses (自动对焦镜片) are generally placed between the screen and the eyes that change based on eye movement and positioning. The vision appears on the screen either by using a mobile phone or HDMI line connected to a PC.
To create a truly immersive virtual reality, there are certain requirements — a frame rate (帧率) of at least 60 fps, a refresh rate and at least 100-degree field of view ( though 180 degrees is perfect). If either of these doesn’t work according to the standards, the user will experience too big of a time difference between their actions and the response from the screen. We need the response to be less than 20 ms ( 1/1000 second) to fool the brain which is achieved by joining all the above in the right proportion (比例). Another matter that needs to be looked at here is to prevent netsickness because of the differences between the frame rate and refresh rate.
Apart from the image, there are certain other things that go into creating an immersive VR experience, holding the user’s attention completely in the virtual environment. For example, sound effects, when put with the image, can create very attractive effects. By using a headphone and 3D sound effects, the user can totally believe in the virtual environment. While perfecting sound effects, proper care needs to be taken about the consistency (一致) between the pictures and the sound. If you start playing frightening music in the background of a happy scene, it will just put the user off.
In future, we will see rapid progress in creating a truly immersive digital experience. With leading players like Google, Microsoft, Oculus, and HTC making great efforts to improve the capabilities (性能), we are not far from achieving a virtual reality that would feel so much better than the real world. If you would like to develop a VR app for your business, then feel free to get in touch. With over 10 years of experience in mobile technologies, we can make every dream a reality.
1.A VR headset helps the user _________.
A. create the vision on the screen
B. understand the technical backend
C. better experience a 3D environment
D. keep interaction with the real world
2.The words "put the user off" in Paragraph 4 probably mean "__________".
A. take the user’s attention away
B. get the user interested
C. hold the user’s imagination back
D. help the user understand
3.What is the main purpose of writing this passage?
A. To give a short introduction of VR.
B. To do business with certain readers.
C. To predict the bright future of VR.
D. To share experiences with readers.
4.What can we learn from the passage?
A. The lower degree field of view, the better images.
B. Sound effects are more important than the image for VR.
C. Some big companies may create a VR better than the real world soon.
D. The brain can tell the time difference when the response is more than 20 ms.

九年级英语阅读单选中等难度题查看答案及解析
Luo Tianyi, the most popular virtual idol (虚拟偶像) in China is ________ animated figure created by a computer.
A.a B.an C.the

九年级英语单选题中等难度题查看答案及解析
Come to meet Luo Tianyi, the most popular virtual idol (虚拟偶像) in China. The 15-year-old singer is not a real person, but an animated figure created by a computer. She has appeared in many TV shows and advertisements. She even held two concerts in Shanghai with nearly 10,000 fans.
Starting career in 2012, Luo is China’s first virtual singer. But she is not the only one. Just in 2017, 14 virtual idols were created in China, according to Global Times.
Although many people think the virtual world is much less reliable (可靠的) than the real one, the virtual idols have all found their places among fans. But how do these virtual idols win people’s hearts when there are so many good-looking and talented human stars?
One possible reason is that virtual idols like Luo are much closer to their fans. Fans write songs for their virtual idols. Luo’s fans have created more than 10,000 songs for her and some have become her most famous works. For example, a fan created a song, in which Luo enjoys all kinds of delicious food. Being a foodie ended up as part of Luo’s personality later. It is the fans who give their virtual idols their own personalities.
Virtual idols are also better at staying out of trouble than human stars. There’s bad news about human stars from time to time, but virtual idols never let people down. By giving people something that can’t be provided by human stars, virtual idols are more than idols to their fans.
1.Who writes songs for Luo Tianyi?
A. Her fans　　 B. Human stars
C. Famous composers　　 D. Other virtual singers
2.According to the passage, a foodie is _______.
A. a kind of food which is very delicious
B. a song about all kinds of delicious food
C. a person who has great interest in food and drinks
D. a book which shows people how to make delicious food
3.Why do some people love virtual idols more than human stars?
① Virtual idols look more beautiful..
② Virtual idols are much closer to their fans.
③ Virtual idols have no bad news around them.
④ Virtual idols’ personalities are better than human stars’.
A. ①③　　 B. ②③　　 C. ②④　　 D. ③④
4.If you want to find out this passage online, you might type in the keywords “_______’ in the search　 engine (搜索引擎).
A. virtual stars　　 B. detective stories
C. scientific achievements　　 D. film reviews

九年级英语阅读单选中等难度题查看答案及解析
This passage is about RealCine.
The technology behind RealCine is virtual reality (VR). Unlike ordinary cinema, RealCine excites all five of our senses: sight, hearing, smell, touch and even taste. RealCine works by making the viewers feel that they are actually in the film. To achieve this, special VR headsets（耳机）are made to help the viewers see a world of 3D and hear the sounds clearly all around them. Special gloves are also worn so that people and objects in the film can be touched. Both the headsets and the gloves are connected to the RealCine computer system. To add to the virtual（虚拟的）world of RealCine, smells are given out through small openings in the headsets. Special food and drinks are delivered into the viewer’s mouth via a sensor.
In scientific studies it has been shown that VR can provide teenagers with another way to experience the world. For example, in one experiment, a teenager whose dream was to be a world–famous football star experienced a VR film where he played the role of the captain of the Brazilian football team.
Besides films, VR might also have some other uses. For example, firefighters could be trained using RealCine to avoid the risk（冒险）of entering a burning building themselves. It could be used in the classrooms too. Teachers could bring history alive by placing students in a famous battle（战役）or they could teach biology by allowing students to be a whale or an ant for a lesson.
1.Is the technology behind RealCine called VR?
2.What do viewers wear so they feel they are actually in the film?
3.How are smells given out?
4.Why do firefighters use RealCine?
5.What does the writer tell us about the RealCine?

九年级英语回答问题中等难度题查看答案及解析
Raising virtual(虚拟) pets is a popular online game among teenagers.“More than 20 of my classmates have adopted(领养) pets online,　　　 last year the number was just 10,” said Wang, a 15-year-old student.
If you go to some websites, you can adopt virtual pets like penguins（企鹅）, chickens, dogs and elephants. You can feed, wash, talk 　　　　 and play with your pet. Dai Yingshuang of Chongqing 　　　　 pets on Kaixin001.com. She said it was great 　　 . She thinks that by looking after her pet she has also learned how to 　　　　 others.
But raising an online pet means one needs to 　　　　 a lot of time online. If one doesn’t feed and look after the pet, it becomes unhappy and unhealthy. There are　　　　　 things an online carer must do. Some parents feel 　　　 . They are afraid that their children may be neglecting(忽视) their studies.
Wang Zhaotong of Anhui, has been raising a penguin on QQ.com since last year. The 14-year-old takes good care of the penguin, which is 　　　 healthy and happy. She said her parents knew about the penguin and think it’s okay. “They believe I can keep the balance between studying and playing,” said Wang. “During the school period, I 　　　 go online and see my penguin at the weekends.”
1.A. but　　　　　　　　　　 B. when　　　　　　　 C. or　　　　　　　　 D. then
2.A. about　　　　　　　　 B. to　　　　　　　　　 C. of　　　　　　　　 D. over
3.A. buys　　　　　　　　　 B. raises　　　　　　　 C. borrows　　　　 D. wants
4.A. fun　　　　　　　　　　 B. funny　　　　　　　 C. boring　　　　　 D. frustrating
5.A. stay with　　　　　　 B. take care of　　　　 C. take care　　　　 D. get on with
6.A. take　　　　　　　　　 B. pay　　　　　　　　 C. spend　　　　　　 D. cost
7.A. the other　　　　　　 B. many other　　　　 C. the others　　　　 D. others
8.A. worried　　　　　　　 B. happy　　　　　　　 C. tired　　　　　　 D. sad
9.A. neither　　　　　　　　 B. nor　　　　　　　　 C. both　　　　　　 D. either
10.A. also　　　　　　　　　 B. only　　　　　　　　 C. always　　　　　 D. never

九年级英语完型填空中等难度题查看答案及解析
--- The Internet has become not only a necessary but also a virtual (虚拟的) world for teenagers.
--- Yes, teenagers should learn to _______ invitations from net friends and can’t go to meet them alone.
A. pull down B. write down C. turn down D. close down

九年级英语单选题中等难度题查看答案及解析
The Internet has become not only a necessary but also a virtual(虚拟的) world for people. With
the development of the Internet， internet friendship has also become very popular. Online friends are those people who have known each other through the Internet. Making internet friends is the same as making pen friends. Many famous websites offer quite warm internet friendship. One can find many people on these websites and they share the same interests. It is difficult to make friends with someone you can’t see or feel. That is the main problem of internet friendship. A virtual friendship would not last forever without seeing each other， but it is an advantage for some people because they are afraid to speak in pubic.
On the other hand， the chances of cheating(欺骗) are very high in an internet friendship. Some people make friends on the Internet with wrong intentions(企图).So while making friends over the Internet， one has to be very careful. Here are some suggestions for you.
·Don’t give personal information， such as your telephone number， address， location， school name as well as your parents’ information， to strangers on the Internet.
·Do not exchange personal photos of you or any family member with people you meet over the Internet.
·Do not go to meet a person you have just met over the Internet. You’d better ask older or other experienced people for advice if you want to go to meet an internet friend.
·Do not accept someone’s request(要求) if you feel he or she is dishonest.
根据上面短文的内容回答问题。
1.Is the Internet necessary and virtual for people?
2.What is the main problem of internet friendship?
3.Why is the virtual friendship an advantage for some people?
4.Who can you ask for advice if you go to meet an internet friend?
5.What does the article give suggestions about?

九年级英语任务型阅读中等难度题查看答案及解析

The Internet has become not only a necessary but also a virtual(虚拟的) world for people. With the development of the Internet, Internet friendship has also become very popular. Online friends are those people who have known each other through the Internet. Making internet friends is the same as making pen friends. Many famous websites offer quite warm internet friendship. One can find many people on these websites and they share the same interests. It is difficult to make friends with someone you can’t see or feel. That is the main problem of internet friendship. A virtual friendship would not last forever without seeing each other, but it is an advantage for some people because they are afraid to speak in pubic.

On the other hand, the chances of cheating(欺骗) are very high in an internet friendship. Some people make friends on the Internet with wrong aims. So while making friends over the Internet, one has to be very careful. Here are some suggestions for you.

Don’t give personal information, such as your telephone number, address, location, school name as well as your parents’ information, to strangers on the Internet.　

Do not exchange personal photos of you or any family member with people you meet over the Internet.　　

Do not go to meet a person you have just met over the Internet. You’d better ask older or other experienced people for advice if you want to go to meet an internet friend.　　

Do not accept someone’s request(要求) if you feel he or she is dishonest.

Internet 　　 1.
2.	1．People who are 　　 3.　　 to speak in public. 2．One can find many people on the websites with the 　 4. interests.
Disadvantages	It’s not 5.　 to make friends with someone you can’t see or feel.
Four pieces of 　 6. on making online friends	1．Don’t give your personal information to 　 7. on the Internet.
2．Don’t 　 8. your personal photos with the people you meet on the Internet.
3．Ask other people for advice before 9. an Internet friend.
4．If you don’t think your Internet friend is　 10. , don’t accept his/her request.

九年级英语其他题简单题查看答案及解析

The Internet has become not only a necessary but also a virtual(虚拟的) world for people. With the development of the Internet, internet friendship has also become very popular. Online friends are those people who have known each other through the Internet. Making internet friends is the same as making pen friends. Many famous websites offer quite warm internet friendship. One can find many people on these websites and they share the same interests. It is difficult to make friends with someone you can’t see or feel. That is the main problem of internet friendship. A virtual friendship would not last forever without seeing each other, but it is an advantage for some people because they are afraid to speak in pubic.
On the other hand, the chances of cheating(欺骗) are very high in an internet friendship. Some people make friends on the Internet with wrong intentions(企图).So while making friends over the Internet, one has to be very careful. Here are some suggestions for you.
·Do not give personal information, such as your telephone number, address, location, school name as well as your parents’ information, to strangers on the Internet.
·Do not exchange personal photos of you or any family member with people you meet over the Internet.
·Do not go to meet a person you have just met over the Internet. You’d better ask older or other experienced people for advice if you want to go to meet an internet friend.
1.What is the main problem of internet friendship? (不超过15个词)
_______________________________________________________________________________
2.Why is the virtual friendship an advantage for some people? (不超过10个词)
_______________________________________________________________________________
3.What does the article give suggestions about? (不超过5个词)
_______________________________________________________________________________

九年级英语其他题中等难度题查看答案及解析
The Internet has become not only a necessary but also a virtual(虚拟的) world for people. With the development of the Internet, internet friendship has also become very popular. Online friends are those people who have known each other through the Internet. Making internet friends is the same as making pen friends. Many famous websites offer quite warm internet friendship. One can find many people on these websites and they share the same interests. It is difficult to make friends with someone you can’t see or feel. That is the main problem of internet friendship. A virtual friendship would not last forever without seeing each other, but it is an advantage for some people because they are afraid to speak in pubic.
On the other hand, the chances of cheating(欺骗) are very high in an internet friendship. Some people make friends on the Internet with wrong intentions(企图).So while making friends over the Internet, one has to be very careful. Here are some suggestions for you.
·Don’t give personal information, such as your telephone number, address, location, school name as well as your parents’ information, to strangers on the Internet.
·Do not exchange personal photos of you or any family member with people you meet over the Internet.
·Do not go to meet a person you have just met over the Internet. You’d better ask older or other experienced people for advice if you want to go to meet an internet friend.
·Do not accept someone’s request(要求) if you feel he or she is dishonest.
根据上面短文的内容回答问题。
1.Is the Internet necessary and virtual for people?
______________________________________________________________________
2.What is the main problem of internet friendship?
______________________________________________________________________
3.Why is the virtual friendship an advantage for some people?
______________________________________________________________________
4.Who can you ask for advice if you go to meet an internet friend?
______________________________________________________________________
5.What does the article give suggestions about?
______________________________________________________________________

九年级英语其他题中等难度题查看答案及解析