题目内容

Knowledge is power, but sometimes I feel thoughts are ________ than knowledge.

A. powerful B. more powerful

C. most powerful D. the most powerful

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—We can’t enter the room. I can’t find my key.

—Is it possible that you ________ it at home?

A. left B. fixed C. managed D. designed

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.

－ It is too noisy outside. What’s up?

－ Oh, some children ________ football in the yard.

A. played B. will play

C. are playing D. have played

书面表达

你看过类似的老人跌倒无人理会的新闻吗？你又听说过最美女教师救她的学生的故事吗？对这两种社会现象，你有什么看法呢？请你以“Would you like to help others?”为题写一篇短文。

内容包括：1. 你对上面其中一件事的看法。

2. 如果你遇到了这样的事情会怎样做。

3. 讲述你的一次类似经历。

作文要求：1. 词数80个左右。不得照抄原文；不得出现学校的真实名称和学生的真实姓名。

2. 条理清晰，语句连贯。

Would you like to help others?

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

The new kind of car is _____ dear, I don’t have _____ money.

A. too much; much too B. much too; too much

C. too much; too much D. much too; much too

榜样的力量是无穷的。在我们身边有许许多多的榜样，勤劳的工人伯伯，辛勤的老师，热情的同学，慈爱的父母......。某英文网站正在开展以“我身边的榜样”为主题的征文活动。假如你是李华，请用英语写一篇短文投稿，谈谈你身边的榜样是谁，他（她）具有什么样的品质，你从他（她）身上学到了什么。

提示词语：kind, helpful, warm-hearted ,hard-working, set a good example

提示问题：

Who is your role model?

What traits(品质）does your role model have? Please give one or two examples.

What have you learned from him/her?

Everyone has a role model. ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

—A set of keys ______ on the desk. ______ your mother’s?

—Oh, Yes. Thanks.

A. is; Are they B. are; Are they C. is; Is it D. are; Is it

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