Some forms of algae have ________ to growing on ice.
A. adopt B. adapt C. advocate D. addict
高三英语单项填空中等难度题
Some forms of algae have ________ to growing on ice.
A. adopt B. adapt C. advocate D. addict
高三英语单项填空中等难度题查看答案及解析
The race to 5G is on. All four major US carriers now have some form of 5G wireless, although it’s all limited roll-outs in only a few cities, mostly using expensive phones that won’t support future nationwide 5G networks. We’re tracking the roll-outs monthly on our Race to 5G page.
The early 5G roll-outs are more like a public test than a final product. AT＆T, Verizon, and T-Mobile are all using technologies that only travel about 800 feet from a cell site, which means there isn’t much coverage. All four carriers are waiting for upgrades（升级）to their base stations that will improve coverage, speed, and reliability. Around the end of this year or the beginning of 2020, AT＆T, Verizon, and T-Mobile all intend to launch 5G networks that use the existing 4G spectrum（频谱）, which will have slower speeds but broader coverage.
We’ve tested AT＆T in Dallas and Las Vegas Sprint in Dallas and New York; Verizon in Chicago, New York, and Providence; and T-Mobile in New York. Every month, we’ve been seeing better performance and more new devices. It’s messy. It’s very early days. And if you like new technology, it’s very exciting.
In previous mobile transformations, we’ve seen most of the big changes happening years after the first announcement. Take 4G, for instance. The first 4G phones in the US appeared in 2010. But the sorts of 4G applications that changed our world didn’t appear until later. So following that plan. While we’re getting a little bit of 5G right now, you should expect the big 5G applications to crop up around 2021 or 2022.
5G stands for fifth-generation-cellular（蜂窝状的）wireless, and the initial standards of it were set at the end of 2017. But a set of standards doesn’t mean that all 5G will work the same-or that we even know what applications 5G will enable. There will be slow but responsive 5G, and fast 5G with limited coverage.
1.What is the present state of 5G in the US？
A.Initial exploration. B.Great improvement.
C.Wide application. D.Extensive promotion.
2.Why does the author take 4G for example？
A.To persuade carriers to give up 5G.
B.To remind people of 4G’s importance.
C.To prove 5G takes time to make a greater difference.
D.To show 5G has failed to meet expectations.
3.What’s the author’s attitude to 5G？
A.Cautious. B.Skeptical.
C.Opposed. D.Objective.
4.What’s the best title for the text？
A.Race to 5G B.5G is coming
C.How fast is 5G？ D.What is 5G？
高三英语阅读理解中等难度题查看答案及解析
—Would you like to have some ice-cream?
—I’d like to, but I'm on a diet ________ weight.
A. lose B. to lose C. being lost D. lost
高三英语单项填空中等难度题查看答案及解析
From the cold Arctic to the African plains, every society seems to have some form of music as part of their culture. Music is so common and widespread that most people don’t even question it anymore. But until recently, there were researchers who doubted it: How could we know that music was really a part of all known societies?
Now, Harvard researchers, Samuer Mehr and Manvir Singh, have found further evidence to support the argument. They gathered music from different countries, media and time periods, and collected descriptions of many different pieces of music. Rather than focusing on music first and then looking at where it could be found, they started by studying a record of detailed descriptions of more than three hundred known global societies, and found that all of them have music as part of their culture.
To see if people could recognize the functions of songs from around the world, the researchers also created a listening experiment in which people tried to guess the behavioral context of a song. This went surprisingly well. Particularly music that was intended for dancing or to calm a baby were easy to recognize as either dance music or lullabies. Love songs were a bit more difficult to qualify, because they tend to be very diverse even within cultures.
This systematic study of connections sounds like the way that researchers in other fields would study biological patterns. “There’s a field known as cultural phylogenetics,” says Singh. Whereas biological characteristics are only received from parent to child, cultural characteristics (like music) are also shared between people of the same generation. That makes it much more difficult to figure out where the characteristic has come from.
“Finally,” Singh says, “We still don’t know why music developed gradually. Our study shows that humans everywhere share cognitive mechanisms (认知机制) that make certain sounds seem appropriate in particular contexts.”
1.What does the underlined word “it” in paragraph 1 refer to?
A.The fact that music is part of every culture.
B.The question whether music is widely spread.
C.The doubt whether further research has been done.
D.The idea that Africa and the Arctic have cool music.
2.What did Mehr and Singh do first?
A.They found out further evidence. B.They studied various societies.
C.They sought the origins of music. D.They focused mainly on music.
3.What’s the purpose of the listening experiment?
A.To comfort a baby. B.To pick out love songs.
C.To create a context. D.To tell functions of songs.
4.What is the main idea of the text?
A.Music shapes societies in different cultures.
B.Global music shares common characteristics.
C.Musical systems display cultural differences.
D.Multi-culture is based on biological patterns.
高三英语阅读理解简单题查看答案及解析
Most people have practiced some form of hobby at a point in their lives, whether it is some form of sports, playing a musical instrument, creating art, cooking or something else. There are many different reasons and skills for taking up a hobby.
Realize you have more time than you think.
This is probably the one thing that keeps most people back from practicing a hobby. 1. But we waste so much time on social media, television commercials and worrying about life which we could have used to practice a hobby. Schedule some time for a hobby into your day. Plan ahead and just do it. Involve other people.
Why? Well, have you ever noticed that you stick to something longer when you feel that you cannot let another person down? So, get-someone to jog with you, or make music with you, or share recipes with you. Plus, you will inspire them to keep on practicing their hobby. 2.Put your money where your mouth is.
3.So give out a bit of your budget to your hobby of choice so that you cannot blame a lack of “materials” for not doing anything.
4.
For me, this has been the most important step in going out and doing a hobby. If you jog, decide which races you want to do this year. If you practice music, organize a concert.
Find the pleasure in what you do.
As with most things, starting of getting something ready to start can be difficult. But don’ t give up. 5.
A. It is a total win-win.
B. Work towards something.
C. Think of a hobby that might interest you.
D. Others' help will definitely do you good.
E. You think that you don ’ t have enough time to even start.
F. The fact is that people spend money where their heart is.
G. Once you have started you'11 find the beauty and relaxation in it.
高三英语七选五中等难度题查看答案及解析
Days of snowstorms have left the city under thick layers of ice and some 50,000 homes without power．
A．to be trapped B．trapped C．having trapped D．being trapped
高三英语单项填空中等难度题查看答案及解析
．Days of snowstorms have left the city under thick layers of ice and some 50,000 homes without power．
A．to be trapped B．trapped
C．having trapped D．being trapped
高三英语单项填空中等难度题查看答案及解析
Over a million children have developed some form of intellectual （智力） disability over the past two decades after being exposed to chemicals including flame retardants, pesticides, lead, and mercury, a study has revealed.
The study focused on the four chemicals, which can be crossed from a mother to her unborn baby through the placenta（胎盘）and cause neurodevelopmental damage. The researchers looked at data from past studies, including blood samples taken from women of childbearing age and 5-year-olds.
Over the period, flame retardants, resulted in 738,860 cases of intellectual disability and an estimated 162 million lost IQ （智商）points, followed by lead at 330,684 cases, pesticides at 111,830, and mercury at 8,860. In recent years, pesticides and flame retardants have overtaken lead and mercury as the chemicals responsible for the biggest loss of IQ among children.
The researchers believe this is due to regulations cutting down the use of these chemicals. For instance, lead has been banned from gasoline, paint and drinking water systems in the U.S. and plants are not allowed to pump out mercury.
The researchers acknowledged limitations to their study, including that the exposure-response relationships might not relate to all populations. Positively, they found a huge drop in the estimated loss of IQ points among children.
Lead researcher Abigail Gaylord, commented: "Our findings suggest that our efforts to reduce exposure to heavy metals are paying off, but that harmful exposures in general continue to represent a terrible risk to people's physical, mental, and economic health. "Unfortunately, the minimal policies in place to remove pesticides and flame retardants are clearly not enough," she said.
She also added. Frequently opening windows to let persistent chemicals found in furniture electronics, and carpeting escape, and eating certified organic produce can educe exposure to these harmful things"
1.Which contributes most to the loss of children's IQ?
A.Flame retardants. B.Pesticide.
C.Lead. D.Mercury.
2.Where does the passage probably come from?
A.A school report. B.A science fiction.
C.A scientific research. D.A chemistry book.
3.What is the drawback of the research mentioned?
A.It has received bad response from all populations.
B.It has no previous information to refer to.
C.It covers only part of the population.
D.It is not supported by government policies.
4.What's the best title for this passage?
A.Four chemicals harming children.
B.Regulations cutting down the use of heavy metals.
C.Environment risking people's physical and mental health.
D.Children IQ lowered by exposure to harmful chemicals.
高三英语阅读理解困难题查看答案及解析
Restaurants have been around in some form for most of human civilization. As far back as ancient Greece and Rome, there was a trend that inns and taverns(客栈) generally served food to people who had a reason to be away from home. 1. Although taverns and coffee houses were popular places to gather and share beverages in the 17th century, the idea of eating out for fun didn’t take off in Western society until the late 18th century.
Although McDonald’s was the first restaurant to use the assembly-line system, some people think of White Castle as the first fast-food chain. 2. At the time, most people considered the burgers sold at fairs, circuses, lunch counters and carts to be low-quality. Many people thought hamburger came from slaughterhouse(屠宰场) scraps and spoiled meat.
3. They built their restaurants so that customers could see the food being prepared. They painted the buildings white and even chose a name that suggested cleanliness. White Castle was most popular in the American East and Midwest, but its success helped give hamburger meat a better reputation nationwide.
The McDonald brothers opened their redesigned restaurant in 1948, and several fast-food chains that exist today opened soon after. 4. And Wendy’s opened in 1969. McDonald’s is now the world’s largest fast-food chain.
According to the National Restaurant Association, American sales of fast food totaled $163.5 billion in 2005. 5. Total sales for McDonald’s grew 5.6 percent in 2005, and the company now has 30,000 franchised stores in more than 120 countries.
A. The industry is growing globally as well.
B. This trend continued until relatively recently.
C. White Castle was founded in 1921 in Wichita, Kansas.
D. Burger King and Taco Bell got their start in the 1950s.
E. It’s hard to imagine fast food without drive-through windows.
F. It allows restaurants to receive and store a large amount of food.
G. White Castle’s founders decided to change the public’s perception of hamburgers.
高三英语七选五中等难度题查看答案及解析
----Mr. Johnson, would you have some more ice-cream?
----No, thanks. It’s very good, but I have to _____ my weight, you know.
A．remain B．notice C．watch D．care
高三英语单项填空中等难度题查看答案及解析