It seems that electronic devices just keep getting smaller. Scientists in the United States have announced the creation of the first transistor with only two dimensions（二维）.
A transistor is a small electronic device that transfers or carries electronic current. Scientists hope these new 2D transistors will be used for building high-resolution（高分辨率）displays that need very little energy.
Two groups of scientists created these 2D transistors. They report that the transistors are only a few atoms thick.
Usually transistors are made with the element silicon（硅）. Computer processors, memory chips, TV screens and other electronic devices contain billions of silicon-based transistors. But these very small electrical parts have certain limitations.
Dimitris Ioannou is an electrical engineering professor at George Mason University. He says the traditional transistor has been improved as much as it can be.He adds that researchers have been looking for new materials with special features and they want transistors to be seen through and soft.
“If the layers are very thin, the transistor can become flexible, so it doesn't have to be rigid（坚硬的）, like it would be in a silicon chip. So people can think of applications like wearable electronics, television screens and other things,” said Ioannou.
These new transistors can also carry higher current. They also can move the current much faster than traditional transistors. This is important for high-definition screens.
Dimitris Ioannou says the scientific success could prove very useful in the future. "Now, how good and how useful it will be, it's still in the stage of research, but it certainly is an advance," said Ioannou.
1.Which of the following statements about the newly created transistor is TRUE?
A. They are expected to be used in high-resolution displays.
B. The transistors are made with the element silicon.
C. They are rigid, just like traditional transistors.
D. They have already been put into actual use.
2.What does the underlined sentence in Paragraph 5 mean?
A. The traditional transistors have been changed into two-dimensional ones.
B. Many of the traditional transistors have been improved over the years.
C. The traditional transistor has been developed to its fullest.
D. The traditional transistor has been developed quite well.
3.What is Dimitris Ioannou's attitude towards the creation of the new transistors?
A. Negative. B. Neutral.
C. Indifferent. D. Positive.
难度: 困难查看答案及解析
The mayor of Flint offered Miss Michigan Emily Sioma high praise on Tuesday for speaking out at this weekend's Miss America conference about the city's water crisis.
“I was really excited for her to do that," Mayor Karen Weaver told TMZ. “I think she was very brave because so many times you say who you are and where you're from and just general information. For her to take that opportunity and use her platform and use her voice to speak up about what‘s going on in Michigan and in Flint, in particular, was just amazing. ”
Emily Sioma,24,introduced herself on stage on Sunday by saying,“From the state with 84 percent of the U. S. fresh water but none for its residents to drink. I am Miss Michigan Emily Sioma.” The brief ‘speech was a reference to Flint, a town with lead-filled drinking water.
Weaver said Sioma's decision to speak about the Flint water crisis demonstrated her impressive character. “I applaud her for being a brave young woman. And it also shows you that she’s not a selfish person," Weaver said. “She could have talked only about herself, but she chose to use this opportunity to bring attention to, and keep attention on, what’s going on in Flint, what’s going on with water quality standards what's going on with this broken infrastructure(基础设施) that we have across the country. "
Ratings showed that 4. 3 million viewers watched the ABC program. Although Miss New York Nia Imani Franklin ultimately won the competition, many Twitter users quickly got behind Sioma, who did not make the final 15, after her introduction.
“Emily Sioma wanted to make an impact,” one Twitter user wrote on Sunday. Regardless of whether you agree with what she said or not- she is shining light on a pressing issue that we have in our state and that is still not solved. That, is a Miss America."
1.What does the underlined word “water crisis'' refer to in Paragraph 1?
A.Water transportation. B.Water shortage.
C.Water reservation. D.Water quality.
2.How does the mayor find Emily Sioma?
A.Curious and cautious. B.Brave and unselfish.
C.Proud and admirable. D.Talkative and outgoing.
3.What does the author intend to do in Paragraph 5?
A.Summarize the previous paragraphs. B.Introduce the ABC program.
C.Emphasize Sioma's influence. D.Add some background information.
4.Which of the following is the best title for the passage?
A.The Mayor of Flint B.A Twitter Voice
C.The ABC Competition D.A Miss America
难度: 中等查看答案及解析
A bra (胸罩) that can be used as a gas mask. Hitting beer bottles over peopled heads. How to turn tequila(龙舌兰) into diamonds? These are just some of the themes for this year’s Ig Nobel prizes—the most unusual scientific award ceremony in the world. And the winners are...
The chemistry prize went to Javier Morales from the National University of Mexico for his research into how to make diamonds from tequila. He used a pressure container to do this.
The public health prize was awarded to Elena Bodnar of Illinois, for patenting a bra that can be changed into a pair of gas masks. “It was inspired by the Chernobyl nuclear accident," said Bodnar, who is originally from the Ukraine.
The physics prize was awarded to Katherine Whitcome at the University of Cincinnati and colleagues. They looked into the question of why pregnant women don’t fall over.
The veterinary(兽医的) medicine prize was awarded to Catherine Douglas and Peter Rowlinson of Newcastle University's school of agriculture. Their research showed that giving cows names such as Daisy increases their milk production. "It’s the highlight of my career, ” said Douglas.
"The work amused the public, but it also addressed a serious problem about the welfare of animals.”
The peace prize went to Stephan Bolliger and his colleagues from the University of Bern in Switzerland. They did experiments to discover whether it’s more painful to hit someone on the head with a full beer bottle or an empty one. “Empty beer bottles are stronger than full ones,” the researchers reported.
And the economics prize went to the officials of four Icelandic banks (Kaupthing bank, Landsbanki, Glitnir bank and Central Bank of Iceland) for demonstrating that tiny banks can be rapidly transformed into huge banks, and vice versa.
It's nice to think that this amazing research is getting the attention it deserves!
1.What prize did Javier Morales win?
A.The chemistry prize. B.The physics prize.
C.The public health prize. D.The economics prize.
2.Why was the public health prize awarded to Elena Bodnar?
A.Because he got inspiration from the nuclear accident.
B.Because he knew how to change tequila into diamonds.
C.Because he patented a bra that can be used as a gas mask.
D.Because he found out why pregnant women don't fall over.
3.According to Paragraph 5, what will happen when cows get names?
A.They will produce more milk.
B.They will grow more quickly.
C.The public will feel amused.
D.A serious problem will become amusing.
4.How did people feel the veterinary medicine prize?
A.Puzzling. B.Amusing.
C.Disappointing. D.Confusing.
难度: 中等查看答案及解析
Most adults find it hard to recall events from their first few years of life and now scientists have found exactly when these childhood memories fade(消失).
A new study has found that most three-year-olds can recall a lot of what happened to them over a year earlier, and these memories persist while they are five and six, but by the time they are over seven, these memories decline(衰退) rapidly.
Most children by the age of eight or nine can only recall 35% of their experiences from under the age of three, according to the new findings.
The scientists behind the research say this is because at around this age the way we form memories begins to change. They say that before the age of seven children do not have a sense of time and place in their memories. In older children, however, the early events they can recall tend to be more adult-like in the way they are formed. Children also have a far faster rate of forgetting than adults. The findings also help to explain why children can often have clear memories of events but then forget them just a couple of years later.
The youngsters first visited the laboratory at the age of three and discussed six unique events from their past, such as family outings, trips to the zoo, and the first day of school. The children then returned for a second session between the ages of five and nine to discuss the same events. The researchers found that between the ages of five and seven, the amount of memories the children could recall remained between 63 -72 percent. However, the amount of information eight-to nine-year-old children could recall dropped to 35 and 36 percent.
1.What does the new study tell us?
A.Childhood memories decline with years.
B.Three-year-old kids are the cleverest.
C.Childhood memories can fade easily.
D.Some adults cannot recall past events.
2.What does the underlined word “persist” in Paragraph 2 mean?
A.Change. B.Remain.
C.Appear. D.Return.
3.What can we learn from Paragraph 4?
A.Adults cannot have clear memories of past events.
B.Children can think like adults when they get older.
C.Children under 7 years old have different ways of forming memories.
D.Children often forget things because they have no idea of time or place.
4.In the second session, nine-year-old children _________.
A.refused to discuss the same events
B.remembered all their family outings
C.could recall 72 percent of their past events
D.only remembered a small part of their past events
难度: 中等查看答案及解析
Quick Ways to Fight September Blues
September can be an exciting time of year with school starting, fall sports coming back, and the cooling of weather. However, this can also start a difficult season. 1. If you are struggling with the September blues, here are some tips you can do to help you go through this time of year.
Get yourself moving
This might not be what you want to hear, but exercising is an excellent way to keep both your body and mind in good shape. If you feel yourself down or anxious, try exercising can help clear your mind and give you a chance to identify what exactly is causing you stress. Do not worry if you do not have time for an hour long workout. 2..
Spread your social butterfly wings
3. You do not need to admit your feelings or bring up your blues, just talk. Invite a friend for coffee, a walk, or dinner. Not sure you want to talk? You could always try a movie. Leaving the house and socializing will help you reset how you feel. If you do not feel comfortable social contact, try sending a text or email.
Get flexible
Yoga is a great way to help reduce stress and get fit. Yoga practice involves learning how to breathe and thinking about your body as you enter each pose. If you are not sure about your balance or flexibility, considering trying a recovering class that focuses on training and recovery. 4., so you can relax as they do the work.5.. It is a common problem affecting both children and adults. If you feel extremely down or begin to feel helpless and worthless, seek out professional help. A licensed therapist(理疗师)can help you work through your feelings so you can get back to feeling like yourself.
The tips above will help you.
A. Pressure always forms in September
B. Some studios will offer recovering classes
C. When you are feeling low, find a friend or two to talk to
D. It is hard dealing with the pressures of a new school year
E. Developing some hobbies is a good way to get rid of stress
F. Just get 10-20 minutes of movement in and you will still benefit
G. If you have realized that September blues are something you struggle with, do not be ashamed
难度: 中等查看答案及解析
It's sad to know that each year many teenagers experience the death of someone they love. This is likely to have an __________ on their life. Although bereavement(丧失) is a difficult and __________ topic, I'm going to talk about some of the things that __________ helped me to cope better after losing my dad in 2012.
The most important __________ is not to "bottle things up". At first, I didn’t tell anyone how I really felt when I should have spoken about it. No one should be __________ to feel upset after losing someone they love, as it’s an __________ time. It is important to talk about how you feel to people you __________ so they can support you. I “opened up” to few people, but it was nice to know that I had people there who I could __________ if I had a (n) __________ day. I spoke to my friends and my teachers, who would offer __________.
Another thing that I found to be __________ after losing my dad was to make a __________ box. This is a box where I put stuff that reminded me of my dad, and the memories I __________ with him. I still have the_______now, and it makes me __________.
Finally, it’s important to take time to grieve(悲痛) properly. I decided to focus on my studies and the things I __________ doing. I get __________ from time to time but I’ve learned that it’s okay to __________.
Everyone will have their own ways of ___________ after losing someone they love. This outlines what I personally found helpful. Everyone should remember that they are not __________.
1.A.independence B.impact C.agreement D.impression
2.A.impressive B.objective C.positive D.sensitive
3.A.personally B.simply C.hopefully D.possibly
4.A.thing B.phrase C.fact D.truth
5.A.pleased B.heartbroken C.desired D.ashamed
6.A.unimportant B.unpleasant C.untouched D.unsatisfied
7.A.meet B.know C.trust D.remember
8.A.look for B.turn to C.speak to D.respond to
9.A.common B.particular C.easy D.bad
10.A.accommodation B.money C.food D.help
11.A.helpful B.disappointed C.painful D.grateful
12.A.chocolate B.experience C.memory D.personal
13.A.provided B.shared C.played D.talked.
14.A.box B.stuff C.memory D.sadness
15.A.stop B.wonder C.smile D.differ
16.A.forgot B.kept C.enjoyed D.considered
17.A.upset B.confused C.bored D.influenced
18.A.laugh B.cry C.question D.calm
19.A.studying B.living C.handling D.passing
20.A.allergic B.alike C.usual D.alone
难度: 中等查看答案及解析
阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
Each time I take the underground I find myself 1. (surround) by dozens of passengers playing smart-phones. They almost won’t even give a glance at the outside world. You may think it is normal to play smart-phones 2. (kill) time. What’s worse, when I talk with some of my friends, they talk as playing, which is really an 3. (annoy).
I really miss the old days when I 4. (chat) with some passengers on the train. Now things are different.
Everyone just concentrates 5. their smart-phones. When talking with them, 6. seems that you are disturbing their playing smart-phones. I could not just blame them for I am moving to be one like them. Sometimes I just feel we 7. (large) ignore our neighbors and want to keep in touch with 8. (distance) strangers through the Internet. We care about the things far away but pay no attention to the needs nearby. 9. ridiculous the situation is! In a way we 10. (control) by smart-phones now. Are you experiencing the same situation like me? Do you have any ways to avoid that?
难度: 中等查看答案及解析
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号∧，并在其下面写出该加的词。
删除：把多余的词用(＼)划掉。
修改：在错的词下画一横线，并在该词下面写出修改后的词。
注意：1.每处错误及其修改均仅限一词；
2只允许修改10处，多者（从第11处起）不计分。
Dear Jim,
Here is a piece of news which may appeal to you. Our school English paper will hold a essay competition which theme is “Natural Disasters”. I’d like invite you to take part in it.
It is well-known that many natural disasters occurs every year in America, cause great damage. You can introduce some mainly natural disasters, such as tornadoes and hurricane and tell some common sense about them. For example, we can introduce how they happen, what harm they may cause, or what you can do in the face of disasters. In China, we also face many natural disasters, but the measures you take may benefit us.
The deadline is on June 8th, 2019. I'm looking forward to your article.
Yours,
Li Hua
难度: 中等查看答案及解析
假设你是学生会主席李华,你校许多外国留学生想在业余时间学习汉语,因此学生会打算在周六下午五点组织汉语学习角(Chinese Comer)活动。现招收志愿者,请你写一则通知,内容包括:
1. 英语流利,了解中国传统文化;
2. 善于沟通,乐于助人;
3. 组织、协调能力强。
4. 有意向的同学可以拨打电话123456789或登录学生会网站www. studentunion.cn报名,报名截止日期为本周三下午两点。
要求：
1.词数100左右;
2.可以适当增加细节,以使行文连贯;
3.开头和结尾已给出,不计入总词数。
参考词汇:协调coordination
Notice
With more and more foreign students getting interested in learning Chinese in their spare time, ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Students’ Union
难度: 中等查看答案及解析