科目: 來源: 題型:
【題目】閱讀下面材料,在空白處填人適當(dāng)?shù)膬?nèi)容(不多于3個(gè)單詞)或括號內(nèi)單詞的正確形式。
The Internet is an amazing information resource. Students, teachers, and researchers use it as 【1】 investigative tool. Journalists use it 【2】 (find) information for stories. Doctors use it to learn more about unfamiliar diseases and the 【3】 (late) medical development. Ordinary people use it for shopping, banking, bill-paying, and communicating with family and friends 【4】 (live) far away or in different parts of a city. People all over the world use it to connect with individuals from 【5】 countries and cultures. 【6】 , although there are many positive developments 【7】 (associate) with the Internet, there are also certain fears and concerns. One concern relates to a lack of control over 【8】 appears on the Internet. With television and radio there are editors to check the accuracy or appropriateness of the content of programs, and with television there are restrictions on what kinds of programs can 【9】 (broadcast) and at what times of the day. With the Internet, parents can not check a published guide to determine what is suitable 【10】 their children to see.
查看答案和解析>>
科目: 來源: 題型:
【題目】任務(wù)型閱讀
請認(rèn)真閱讀下面短文,并根據(jù)所讀內(nèi)容在文章后表格中的空格里填入最適當(dāng)?shù)膯卧~。注意:每空一個(gè)單詞。
Why Blue LED Lights Won the Nobel
The 2014 Nobel Prize in physics went to three scientists who gave lighting a big change by inventing blue LED lights. A big change in lighting efficiency is under way around the world.
Save and green
LEDs use less energy than other forms of lighting. A typical LED bulb(燈泡) can produce around 83 lumens per watt — a measure of how much brightness you can get from a unit of electrical power — much more efficient than other lighting facilities.
LEDs produce light by passing electric current through a semiconductor, while traditional bulbs pass current through a wire. The wasted heat energy is chiefly why traditional bulbs are so much less efficient.
LEDs also last about 30 times longer than traditional bulbs, and many LED bulb products promise up to 25,000 hours of use — more than 17 years if you used one for about four hours a day.
Lighting the world
The lighting transformation is not only in homes. LEDs are also being used for street lights, public holiday and decorative displays, commercial buildings, and other large energy users.
Car lighting is another application where LEDs are making progress. LEDs used to be used only for daytime running lights, but now many new cars have LED headlights for night-time use.
LEDs also hold promise for bringing light to the more than 1.5 billion people around the world without access to electricity, the Royal Swedish Academy of Sciences noted. Indeed, several proposed solutions to energy poverty include the distribution of LED lights, particularly solar-powered ones.
Digital displays
Without blue LEDs, the world wouldn’t have back-lit smart phones, TV and computer LCD screens, blu-ray(藍(lán)光) players, many forms of lighting, and countless other products.
In the electronics industry, LEDs provide back lighting for LCD screens in many smart phones, laptops, and televisions. The LEDs are more energy efficient and allow for very thin displays.
Blu-ray players use blue LED lasers(激光) to read data off a digital optical disc. When these systems switched from using an infrared(紅外線) laser to a blue LED laser, it became possible to store five to 10 times as much data.
LEDs are now being explored for their potential uses to transmit(傳送) data from the Internet across open space, similar to WiFi. Such a system could transmit a lot more data than WiFi alone. This high bandwidth is possible because LEDs can turn on and off millions of times per second.
The rise of LED lighting came at a time when people were just starting to be concerned about global warming. Because of LEDs’ energy efficiency, using them for the world’s lighting would affect environmental protection in a positive way.
Why Blue LED Lights Won the Nobel
The reason why blue LED lights won the 2014 Nobel Prize in physics is that they are to 【1】______ in big changes in lighting. | |
Save and green | 【2】_______ with other forms of lighting, LEDs are much more efficient because of the different ways they pass electric current. What’s more, LED bulbs can be 【3】_______ 30 times longer than traditional bulbs. |
Lighting the world | 【4】_______ from household applications of LED bulbs, they can also be used as street lights and car headlights. |
Because of their high efficiency, LEDs, especially solar-powered ones, 【5】_______ to light areas without access to electricity. | |
Digital displays | Many smart phones, laptops and televisions use LEDs to back-light their LCD【6】_______. |
By using blue LED lasers, blu-ray players are likely to store 【7】________ data. | |
People are now exploring more 【8】_______ uses of LEDs such as transmitting data. | |
【9】_______ | LED lighting will have a positive 【10】________ on environmental protection. |
查看答案和解析>>
科目: 來源: 題型:
【題目】A Santa Monica High School teacher ________ put on leave after using physical force to control a student selling marijuana(大麻) in his classroom ________ surprising support on Facebook.
A. who; has received B. who was; was received
C. was; was received D. that was; has received
查看答案和解析>>
科目: 來源: 題型:
【題目】With online courses, anyone can acquire knowledge in any field of interest for free. All you need is a computer, laptop or Smart phone, internet connection and a self-made schedule. You can even get a certificate on completing the course.
Udemy Its goal is to promote the world of education by enabling anyone to learn online. It seeks to dramatically change education by inviting millions of experts worldwide to teach and share what they know. Whether you want to learn excel, business, academics, the arts, health, music or technology, there is a comprehensive course for you. See more at https://udemy.com |
iTunes U If you’re a student who uses Apple devices, you will be happy to know that you have access to iTunes U, which gives you access to different educational courses from all leading universities for free! Did you dream of studying at MIT, Oxford, Yale, or Cambridge? This is your chance to learn various subjects from the best colleges and universities in the world. Learn more at https://iTunesU.com |
Skillfeed If you are looking to learning a new skill, or improving on your skills in Photoshop, or HTML, it offers unlimited access to high-quality video courses from a worldwide community of instructors. You have a month’s free trial, after which you will pay a monthly fee to gain unlimited access to all courses. See more at https://skillfeed.com |
Academic Earth It has linked to over 750 online courses and 8,500 individual online lectures, giving students of all ages access to college courses they may otherwise never experience. Whether learning existing coursework, or learning for the sake of learning, anyone has the freedom to learn at their own pace from world-famous experts, without being charged more. Learn more at http://academicearth.com |
UC Berkeley It offers courses in bio-engineering, Japanese, legal studies and public health. Since they are recordings of actual lectures, they lack lecture notes and extra materials. However, each course has audio recordings of lectures via iTunes or video recordings of lectures via YouTube. Learn more at https://ucberkeley.com |
【1】Learners who choose Skillfeed need to ________.
A. equip themselves with the ability to use the computer
B. pay some fee if they want to continue after a month
C. have some knowledge of the design of website
D. learn to upload their own high-quality video
【2】We can learn from the passage that Academic Earth ________.
A. charges learners nothing for any course
B. has many lectures given by 8,500 lecturers
C. provides college courses mainly to young men
D. offers college courses at the learners’ convenience
【3】If you want to improve your skill of Japanese language, you can visit ________.
A. https://skillfeed.com
B. https://ucberkeley.com
C. https://udemy.com
D. https://iTunesU.com
查看答案和解析>>
科目: 來源: 題型:
【題目】-- The manager of the factory wants to improve production a great deal, but he doesn’t spend much on technology.
-- I am afraid he won’t realize his dream. You know ________.
A. you can’t eat your cake and have it
B. empty vessels make the greatest sound
C. enough is as good as a feast
D. two heads are better than one
查看答案和解析>>
科目: 來源: 題型:
【題目】短文改錯
假定英語課上老師要求同桌之間交換修改作文,請你修改你同桌寫的以下作文。文中共有10處錯誤,每句中最多有兩處。錯誤涉及一個(gè)單詞的增加、刪除或修改。
增加:在缺詞處加一個(gè)漏詞符號(∧),并在其下面寫出該加的詞。
刪除:把多余的詞用斜線(\)劃掉。
修改:在錯的詞下劃一橫線,并在該詞下面寫出修改后的詞。
注意:1.每處錯誤及其修改均僅限一詞;
2.只允許修改10處,多者(從第11處起)不計(jì)分。
In our daily life, we come across various challenge now and then. The big challenge of all in my life was happened when I entered senior high school. I was shocked to find that the English teacher taught totally beyond me. Think I just lacked the gift for English, I stopped making efforts. Fortunately, my teacher didn’t give up on me. Instead, she helped me analyze her problem and I realized I need to meet the challenge bravely. I regained my confidence, adjusted approaches and worked hardly.
From the above experience, I have learned that it is not only our talents and our efforts that help us achieve success. Faced with challenges, we should fight bravely instead giving up.
查看答案和解析>>
科目: 來源: 題型:
【題目】 單詞拼寫
【1】My calculations were based on the a__________ that house prices would remain steady.
【2】Teachers have to constantly update their knowledge in order to maintain their professional c__________.
【3】O__________, we can’t find ample evidence that there is life in space.
【4】I am extremely s__________ about what I read in the newspaper.
【5】He r___________ to as many as two or three different newspapers since he knew the importance of information.
【6】Our government tried hard to improve our living conditions by __________ (加快)the rate of economic growth.
【7】__________ (入迷)herself to love stories, the girl almost forgot everything,which made her parents very disappointed.
【8】Does the name on the envelope __________ (相一致) with the name on the letter inside?
【9】Under no __________ (狀況) will our country give in to any country that wants to occupy Diaoyu Island.
【10】The old man who was in __________ (擁有) of little money owned good health and a happy life.
查看答案和解析>>
科目: 來源: 題型:
【題目】—Do you mind choosing Peter to be the new chairman?
—________.
A. Of course. He is the best choice
B. Certainly not. We can’t find a better one
C. Yes, I do. He is the most suitable person
D. No, I don’t. I don’t think he is the suitable person
查看答案和解析>>
科目: 來源: 題型:
【題目】When it comes to the majority of the latest technologies in the next 20 years, ________ has greater potential than the technology being developed in these young people’s company, ________ in my eyes will lead to a revolution.
A. nothing; which B. none; where
C. nothing; where D. none; which
查看答案和解析>>
科目: 來源: 題型:
【題目】It is said that body language ________ 55 per cent of a first impression while what you say just 7 per cent.
A. lies in B. accounts for
C. consists of D. goes with
查看答案和解析>>
湖北省互聯(lián)網(wǎng)違法和不良信息舉報(bào)平臺 | 網(wǎng)上有害信息舉報(bào)專區(qū) | 電信詐騙舉報(bào)專區(qū) | 涉歷史虛無主義有害信息舉報(bào)專區(qū) | 涉企侵權(quán)舉報(bào)專區(qū)
違法和不良信息舉報(bào)電話:027-86699610 舉報(bào)郵箱:58377363@163.com