Tips on buying outdoor solar lights(太阳能灯)
As solar lighting is becoming useful for homes,many different such outdoor lights can now be found in supermarkets.Here are some helpful tips for customers.
Does your area receive enough direct lighting?
1.So you shouldn't even give it a thought if you live in an area that doesn't get much sunlight.These lights need direct sunlight,or they just won't work very well.2.
The expensive one usually means good quality Choosing the cheapest ones will result in many problems.For once,it's best to buy more expensive lights of high quality.3.At least you should know the difference between a $10 light and a $45 light.
Buy lights that require less installation(安装)
Most solar lights are simply driven into the ground.Therefore.you shouldn't deal with the difficulty in installing a system that involves anything more than that.4.You don't need to buy lights that require half an hour each to plant into the ground because that's just a waste of time.
Make sure the lights can store enough energy.
Different solar lights can store different amounts of energy5.Therefore,you should choose lights that are able to store enough energy to last for a few hours or more,at least those that will last from nightfall throughout most of the night and part of the morning.
A.They should take a few minutes each to get into the ground
B.Without sunlight,solar lighting is useless.
C.It means some will stay lit longer than the others
D.Buy many solar lights instead of just one or two.
E.Choose something a bit more expensive for once.
F.That doesn't mean you have to spend all your money.
G.Solar lights are becoming more and more popular.
高二英语七选五中等难度题
Tips on buying outdoor solar lights(太阳能灯)
As solar lighting is becoming useful for homes,many different such outdoor lights can now be found in supermarkets.Here are some helpful tips for customers.
Does your area receive enough direct lighting?
1.So you shouldn't even give it a thought if you live in an area that doesn't get much sunlight.These lights need direct sunlight,or they just won't work very well.2.
The expensive one usually means good quality Choosing the cheapest ones will result in many problems.For once,it's best to buy more expensive lights of high quality.3.At least you should know the difference between a $10 light and a $45 light.
Buy lights that require less installation(安装)
Most solar lights are simply driven into the ground.Therefore.you shouldn't deal with the difficulty in installing a system that involves anything more than that.4.You don't need to buy lights that require half an hour each to plant into the ground because that's just a waste of time.
Make sure the lights can store enough energy.
Different solar lights can store different amounts of energy5.Therefore,you should choose lights that are able to store enough energy to last for a few hours or more,at least those that will last from nightfall throughout most of the night and part of the morning.
A.They should take a few minutes each to get into the ground
B.Without sunlight,solar lighting is useless.
C.It means some will stay lit longer than the others
D.Buy many solar lights instead of just one or two.
E.Choose something a bit more expensive for once.
F.That doesn't mean you have to spend all your money.
G.Solar lights are becoming more and more popular.
高二英语七选五中等难度题查看答案及解析
Light is a complex phenomenon classically explained with a simple model based on rays and wavefronts. Many of the aspects of light have been explored, but few people notice them happening in their real lives. For example, most of us observe some type of optical interference almost daily, but usually don't realize the events in play behind the ever-changing display of colors produced when light waves interfere with each other. One of the best examples of interference is shown by the light reflected from a film of oil floating on water. Another example is the thin film of a soap bubble, which reflects a series of light with beautiful colors when shined by natural or man-made light sources.
Electromagnetic radiation(电磁辐射), the larger family of wave-like phenomena to which visible light belongs, is the primary vehicle transporting energy through the vast reaches of the universe. The means by which visible light is sent out or absorbed, and how it predictably reacts under different conditions as it travels through space and the atmosphere, form the basis of the existence of color in our universe. The human eye is sensitive to a form of electromagnetic radiation that lies in the wavelength range between 400 and 700 nanometers(纳米),commonly known as the visible light spectrum, which is the only source of color. When combined, all of the wavelengths present in visible light form colorless white light. Red, green, and blue colors are classically considered the primary colors because they are fundamental to human vision. Light is observed as white by humans when our eyes are affected by equal amounts of red, green, and blue light at the same time.
The concept of color temperature is of great importance in photography and digital imaging, regardless of whether the image capture device is a camera or a microscope. A lack of proper color temperature balance between the microscope light source and the image sensor is the most common reason for unexpected color shifts in photomicrography(显微照相术)and digital imaging. If the color temperature of the light source is too low for the film, photomicrographs will have an overall yellowish or reddish cast and will appear warm. On the other hand, when the color temperature of the light source is too high for the film, photomicrographs will have a blue cast and will appear cool. As problematic as these color shifts may seem, they're always easily corrected by the proper use of conversion and light balancing filters(滤光器)。
1.Which of the following is right according to the 1st paragraph of the passage?
A.Most of us aren't explicit about how colors are produced.
B.Light is classically defined in terms of rays and wavefronts.
C.People can understand optical interference by watching films.
D.Shined by natural or man-made light sources, films reflect a series of light.
2.What can we learn about electromagnetic radiation?
A.It moves in a straight line.
B.Color originates from it.
C.Green lights are not part of it.
D.Its wavelength can't be 500 nanometers.
3.The color shifts on photomicrographs__________.
A.are difficult to get right once formed
B.are caused by the high colors more often
C.prove that how important the color temperature is in imaging
D.are caused by the high color temperature of the light source
4.Which of the following would be the best title for the passage?
A.Light and imaging
B.Light and color
C.Light and temperature
D.Light and radiation
高二英语阅读理解中等难度题查看答案及解析
Blue light before bedtime can make it harder to sleep, and the screens on phones, computers, and televisions send out plenty of blue light. This is all true. But if you're focused on blue light as a major problem affecting your sleep or your eye health, it's time to look at it from another aspect.
As Philip Yuhas, a professor of vision, writes at The Conversation, blue light isn’t a uniquely technological evil. It's part of sunlight, and your eyes are exposed to plenty of it all the time. You ' re fine. There are studies in mice that have found blue light can damage their eyes, but mice are nocturnal creatures (夜行动物) whose eyes are different from ours. The pigments (色素) and the lenses (晶状体) of our eyes actually block blue light fairly well--so in a sense, we already have built-in blue blocking protection
Adding more protection isn't likely to help though. You can buy glasses and screen filters (滤光片) that block blue light, but Yuhas points out they are probably a waste of money: these products do not block out much blue light. The leading blue-blocking anti-reflective coating, for example, blocks only about 15% of the blue light that screens send out. You could get the same reduction just by holding your phone another inch from your face.
The American Academy of Ophthalmology doesn't recommend blue-blocking products, either. Instead if you're concerned about your eye health or your ability to get to sleep on time, you already know what to do:
Put the screens away at bedtime. Read a book or find something else to do. While you're using screens take a 20-second break every 20 minutes to look at something 20 feet away ( the "20-20-20 " rule ). If you get dry eyes when you look at screens for a long time, use eyedrops labeled artificial tears.
1.What do people think of blue light generally?
A.It is a necessary part of sunlight. B.It is magical and rare.
C.It is the major factor affecting sleep. D.All electronics send out blue light.
2.What did the studies in mice find?
A.Mice can see clearly in the dark. B.Our eyes actually block blue light well.
C.Eyes can be long exposed to blue light. D.Blue light can damage mice's eyesight.
3.What can we know about blue-blocking products?
A.They block only 15% of the blue light. B.Few have much effect on the blue light.
C.They can prevent much harmful lights. D.They are thought highly of by experts.
4.What could be the best title for the text?
A.How can Blue Light Be Prevented? B.Why does Blue Light Make Sleeping Hard?
C.Are Blue-blocking Products Necessary? D.What will Blue Light Affect Actually?
高二英语阅读理解中等难度题查看答案及解析
As we slowly drove down the street on that cold December evening we spotted the porch(门廊)light."This ____be the house."I told our "Positive Teens In Action" group with certainty.We____in front of an older home with the porch light shining.We gathered up our____books,walked up the steps,and___ _on the door.We heard a____ voice from inside say,"Come in.The door is open."We opened the door.
There in a rocking chair____an elderly woman with a big____on her face."I've been____you,"she said weakly. Ruth was one of our "Meals On Wheels" stops I had____.I had phoned her and told her about it.Going along with me were the____church members who____singing carols(颁歌).We____Ruth the basket of delicious food the teens had prepared earlier that evening.Then I asked Ruth what carols she would like to____.Ruth was smiling cheerfully when she____singing each song.
____we hugged Ruth good-bye she said to me with tears in her eyes,"The day you____I was still in bed.l had just finished____.I asked God if it would be possible to have some Christmas carolers come to my home and____ this year.Thank you for being the____to my Christmas prayer."
Wow,what an awesome____to have the opportunity to make Ruth quite content!
1.A. can B. must C. will D. may
2.A. pulled up B. sped up C. looked out D. set out
3.A. guide B. story C. song D. exercise
4.A. depended B. focused C. rested D. knocked
5.A. calm B. weak C. sweet D. loud
6.A. came B. sat C. saw D. found
7.A. worry B. embarrassment C. surprise D. smile
8.A. expecting B. watching C. admiring D. praising
9.A. presented B. ordered C. arranged D. accepted
10.A. possible B. usual C. typical D. normal
11.A. admitted B. allowed C. imagined D. enjoyed
12.A. handed B. returned C. awarded D. cooked
13.A. teach B. introduce C. hear D. write
14.A. joined in B. gave up C. insisted on D. put off
15.A. Until B. Though C. Since D. As
16.A. stayed B. called C. left D. agreed
17.A. praying B. reading C. crying D. washing
18.A. play B. eat C. sing D. chat
19.A. direction B. approach C. road D. answer
20.A. lesson B. quality C. experience D. dream
高二英语完形填空中等难度题查看答案及解析
A sun-starved Norwegian town has finally seen the light—by installing giant mirrors on the surrounding mountains to reflect rays onto its market square.
The small town of Rjukan sits deep in the narrow Vestfjord Valley,in the Telemark region south-west of Oslo. The towering peaks that surround it rise to almost 2,000 meters above sea level and block out the sunlight for half the year, meaning Rjukan residents live in a permanent shadow from September to March.
But all that changed this week, with the official launch of a project first proposed a century ago. Three high-tech mirrors,with a combined reflective surface of 50 square meters, have been put into operation on a ridge(山脊) on Gaustatoppen mountain,brightening up the previously gloomy town center by flooding it with up to 600 square meters of sunlight.
Twenty-first century technology has made the $850, 000 project possible, with heliostats—computer-powered mirrors—shifting every 10 seconds to track the movements of the sun during the day.
But the idea to lighten up the dark town actually dates back 100 years. Rjukan was originally founded as a company town for Norsk Hydro, which set up a fertilizer plant here to make use of the hydro power from the nearby 104 meter Rjukanfossen waterfall. The story goes that the aluminum(铝) and renewable energy company’s founder,Sam Eyde,wanted a way to brighten up the existence of his shadowed 1aborers--and also to make them work more effectively during the winter.
The local newspaper published a suggestion by local bookkeeper Oskar Kittelsen to use a mirror to reflect sunlight onto the town,and Eyde picked up on the idea. Technological limitations of the day meant the plan never came to fruition,however, and instead northern Europe’s first cable car was built in 1928 to give Rjukan residents sunlight exposure at the top of the mountain.
1.Rjukan residents used to 1ive in a permanent shadow from September to March .
A. because it sits near the Arctic Circle(北极圈)
B. because it is located in a deep valley
C. because the sunlight was stopped by peaks
D. because it 1ies to the southwest of Oslo
2. The underlined word“flooding”in the third paragraph means .
A. covering B. counting
C. widening D. viewing
3.Norsk Hydro set up Rjukan because .
A. there were quantities of cheaper labors
B. there existed large amounts of hydro power
C. it was very convenient to use water
D. there was rich aluminum and water resources
高二英语阅读理解困难题查看答案及解析
Light and bright, cheap and cheerful: IKEA’s 400-plus outlets (专营店) in 49 countries all run on the same central principle. Customers do as much of the work as possible, in the belief they are having fun and saving money. You drive to a distant warehouse built on cheap out-of-town land. Inside, you enter a maze (迷宫) — no shortcuts allowed — where every twist reveals new furniture.
Compared with the prices of other outlets, IKEA’s are much lower. You load up your trolley (手推车) with impulse buys-a clock, storage boxes, tools and more chairs than you will ever use. You drag cardboard boxes, cupboards and tables into your car and reward yourself for your economy and good taste. Then you drive home and put your prizes together. You are satisfied with the bargains. IKEA is satisfied with your money.
The company’s name was a do-it-yourself job, too. IKEA stands for Ingvar Kamprad, from Elmtaryd ― his family’s farm — in Agunnaryd. That village is in the Smaland region of southern Sweden. Mr Kamprad founded IKEA aged 17. Well before that, he spotted a principle which would make him one of the richest men in the world that customers like buying goods at wholesale prices (批发价). First he bought matches in large quantities and sold them by the box. Aged ten, he sold pens in the similar way.
Setbacks inspired him. Facing a price war against his low-cost mail-order furniture business, he defeated competitors by opening a showroom. Dealers tried to crush Mr Kamprad and banned him from their trade fairs. He slipped in, hiding in a friend’s car. When they tried to threaten his suppliers, he relied on his own workers, and secretly sold his production to communist Poland. Decades later, east Europeans freed from the planned economy drove hundreds of miles to newly opened outlets in Moscow and Warsaw.
His self-discipline was world-famous. As a child, he removed the “off” button from his alarm clock to stop himself oversleeping. He rarely took a first-class seat. The wine didn’t get you there any earlier, he sniffed; having lots of money was no reason to waste it. He bought his clothes in second-hand markets, and for years drove an elderly Volvo until he had to sell it on safety grounds. He had his hair cut in poor countries to save money. Visitors admired the views, but were surprised that his house was so shabby. He worked well into his eighties.
His diligence and simple way of life set a good example to his 194,000 “co-workers”. But he was not mean. The point of cutting costs was to make goods affordable, not to compromise quality. He urged his staff to reflect constantly on ways of saving money, time and space. An improved design that allows easier piling means shipping less air and more profit.
Culture was more important than strategy. He disliked “exaggerated (夸张的) planning”, along with financial markets and banks. Better to make mistakes and learn from them. And use time wisely: “You can do so much in ten minutes. But ten minutes once gone are gone for good.” This did not apply to customers. The longer they stayed, the better.
Mr Kamprad’s impact on modern life can be compared with that of Henry Ford and the mass-produced motor car. Furniture used to be expensive, dark and heavy. For many people, decorating a home could cost many months’ salary. IKEA made furniture not just affordable and functional, but fun. The mission was civilizational, he felt, changing how people lived and thought.
His approach drew some fire. The company values struck some as unpleasant. At IKEA’s Corporate Culture Centre, lots of pictures of Mr Kamprad with his mottos can be seen everywhere. What’s worse, some parts of the supply chain seemed to have serious problems to overcome.
1.What can we learn about IKEA in Paragraph 1?
A.IKEA prefers rural areas for its location.
B.IKEA has 400 outlets throughout the world.
C.IKEA likes to store new furniture in a maze.
D.IKEA provides a lot of work for its customers.
2.The underlined two sentences in Paragraph 2 imply that ________.
A.IKEA tricks you into spending more money
B.you may buy bargains with impulse in IKEA
C.both you and IKEA are pleased with the deal
D.both you and IKEA are happy with the bargain
3.By mentioning Mr. Kamprad’s experiences before he founded IKEA, the author intends to tell us that Mr Kamprad ________.
A.was likely to become a successful businessman
B.preferred selling matches and pens by low prices
C.had been a well-off merchant due to his principle
D.enjoyed doing something promising with discipline
4.What can be inferred from paragraph 5 and 6 about Mr. Kamprad?
A.He never overslept due to his alarm clock being set.
B.He was against drinking but for sniffing at the wine.
C.He sold the old Volvo with the purpose of saving money. -
D.He didn’t give up the quality of furniture for more profit.
5.Which of the following has nothing to do with Mr. Kamprad’s success in business?
A.The pictures and mottos of Mr. Kamprad.
B.The setbacks Mr. Kamprad experienced.
C.Mr. Kamprad’s principles of management.
D.Mr. Kamprad’s self-discipline and diligence.
高二英语阅读理解中等难度题查看答案及解析
Carrying a light load on your bicycle makes it more difficult to control.
A. more than B. not more than
C. less than D. no more than
高二英语单项填空中等难度题查看答案及解析
It’s midnight already, but the lights in Shi Guang’s dormitory are still on. He and three other students are sitting back to back. They’re all wearing earphones and staring at a computer screen, talking to each other only in words like “charge” or “retreat”. Chen Jiasheng, 22, a senior majoring in electrical engineering and automation at Beijing University of Aeronautics & Astronautics, is a gaming team leader. “ Online gaming is not just about gaming, it’s a community in which we communicate with each other using our avatars(化身),” said Chen. For university students like Chen, online gaming has become more than a fashion – it’s part of life and a way of socializing.
A 2012 research report on online gamers in China released by 17173.com, the country’s leading game information portal, supports this concept. According to the report, university students aged between 19 and 25 make up 58 percent of online gamers, and the proportion is rising every year. “Many of my friends spend more time hanging out in online gaming worlds than in reality,” said Wang Jiaming, 21, a junior law major at China University of Political Sciences and Law. “Personally I feel more powerful in virtual worlds than in real life. I’m more confident.”
According to Zhang Quan, 20, a student in the second year economics major at Renmin University of China, one of the distinguishing features of online games compared with offline games is the gaming experience. Offline games test a gamer’s skill at using a keyboard to beat rivals. “Online games are technically more accessible as you don’t have to master these skills,” said Zhang.
But most online games are based on avatars controlled by another human – they are unavoidably more tricky and unpredictable by a computer. “On the surface we are playing games, but actually it’s real people we are dealing with,” added Zhang. “The only difference is that in these games we communicate with each other in different settings, like wars, magic battles and fantasy worlds.”
By engaging in this interactive gaming experience, gamers become team players and promote their social skills. Chen has even made friends by playing in a team with strangers online. “We coordinated our movements and cooperated with each other to win a battle in the cyberspace. The game was virtual but the brotherhood was real. Most of us are good friends in real life,” said Chen.
1.According to the passage, which statement of the following is true?
A. Online gaming is the only world where the young communicate with each other by using their avatars.
B. Online gaming is important to those aged between 19 and 25.
C. Online gaming has a bad effect on health as university students usually stay up playing.
D. An increasing number of university students play online games.
2.The passage is mostly about ______.
A. some interviews to young people about online gaming.
B. positive effects from online gaming on university students.
C. learning how to co-work with their mates for online gamers
D. the differences between online games and offline ones.
3.The underlined word can be best replaced by ______.
A. competitors B. strangers C. teammates D. partners.
4.Which can be the best title of this passage?
A. Online gaming B. Beyond a virtual reality
C. Virtual cooperation D. Real interaction
高二英语阅读理解中等难度题查看答案及解析
The students left the room _______all the lights on.
A. with B. and C. but D. when
高二英语单项填空中等难度题查看答案及解析
I went to India for a 2-week vacation to visit my relatives. We stopped on a red light, and as always, there were a lot of activities outside the cars near the . People walked in, between the cars newspaper, water and a number of kids looked for a bit of charity from the car owners. It’s a familiar in most poor developing countries.
While we were for the red light to turn green, I noticed a man outside a couple of in front of ours trying to sell bottles of water. It’s unusual at first. He was a man in his 40s with relatively clothes. But he walked around in a strange way. He kind of his way around the spaces. He was blind.
Carrying a couple of water bottles on one hand, he got to the outside of our car. Out of , my mum decided to buy one water bottle. As she gave the man the money, the light turned green. The car behind sounded loudly and , trying to get ahead of traffic. Seeing this, my mum kindly told the man to the change. However, with his sense of touch, he quickly went through his shirt pocket and threw the money at my mum’s . It was the exact change. The cars behind us were really getting out of control, we decided to go on our way.
I broke down and even when I got home. Here’s a blind man, born in , trying to sell water bottles on the streets to make ends meet. He our sympathy. Life hasn’t been to him, yet he’s giving it his best shot. I think that is what is all about facing life bravely.
1.A. signs B. crossroads C. stations D. theatres
2.A. giving B. buying C. selling D. throwing
3.A. scene B. play C. activity D. street
4.A. watching B. asking C. waiting D. changing
5.A. blocks B. crossings C. turns D. cars
6.A. everything B. something C. anything D. nothing
7.A. expensive B. fashionable C. ragged D. fastened
8.A. pushed B. drove C. cleared D. felt
9.A. eventually B. quickly C. frequently D. happily
10.A. curiosity B. sympathy C. thirsty D. politeness
11.A. impatiently B. casually C. naturally D. carefully
12.A. keep B. return C. borrow D. count
13.A. poor B. superior C. limited D. enlarged
14.A. hand B. arm C. face D. lap
15.A. still B. yet C. so D. but
16.A. smiled B. shouted C. complained D. cried
17.A. pain B. poverty C. sadness D. loneliness
18.A. refused B. enjoyed C. doubted D. cheated
19.A. rich B. unfair C. kind D. bad
20.A. kindness B. courage C. experience D. challenge
高二英语完形填空中等难度题查看答案及解析