.So often ______ in recent years that it has ...

相关试题

.So often ______ in recent years that it has almost become a rule.
A. has this happened B. this has happened
C. is this happening D. for this to happen

高三英语单项填空简单题查看答案及解析
----In recent years, _____problem of global warming has become very serious.
----That’s right. People are facing _____diversity of natural disasters now.
A. /, a B. a, the C. the, a D. a, a

高三英语单项填空简单题查看答案及解析
Although it has been revealed in recent years that plants are capable of seeing, hearing and smelling, they are still usually thought of as silent. But now, for the first time, they have been recorded making ultrasonic cries when stressed, which researchers say could open up a new field of precision agriculture where farmers listen for water-starved crops.
Itzhak Khait and his colleagues at Tel Aviv University in Israel found that tomato and tobacco plants made cries at frequencies humans cannot hear when stressed by a lack of water or when their stem is cut.
Microphones placed 10 centimetres from the plants picked up sounds in the ultrasonic range of 20 to 100 kilohertz, which the team says insects and some mammals would be capable of hearing and responding to from as far as 5 metres away. A moth may decide against laying eggs on a plant that sounds water-stressed, the researchers suggest. Plants could even hear that other plants are short of water and react accordingly, they speculate.
On average, drought-stressed tomato plants made 35 sounds an hour, while tobacco plants made 11. When plant stems were cut, tomato plants made an average of 25 sounds in the following hour, and tobacco plants 15. Unstressed plants produced fewer than one sound per hour, on average.
It is even possible to distinguish between the sounds to know what the stress is. The researchers trained a machine-learning model to discriminate between the plants’ sounds and the wind, rain and other noises of the greenhouse, correctly identifying in most cases whether the stress was caused by dryness or a cut, based on the sound’s intensity and frequency. Water-hungry tobacco appears to make louder sounds than cut tobacco, for example.
Enabling farmers to listen for water-stressed plants could “open a new direction in the field of precision agriculture”, the researchers suggest. They add that such an ability will be increasingly important as climate change exposes more areas to drought.
“The suggestion that the sounds that drought-stressed plants make could be used in precision agriculture seems feasible if it is not too costly to set up the recording in a field situation,” says Anne Visscher at the Royal Botanic Gardens, Kew, in the UK.
She warns that the results can’t yet be broadened out to other stresses, such as salt or temperature, because these may not lead to sounds. In addition, there have been no experiments to show whether moths or any other animal can hear and respond to the sounds the plants make, so that idea remains speculative（推测的）for now, she says.
1.The experiment by researchers at Tel Aviv University shows that_______.
A.tobacco plants make louder sounds than tomato plants when hurt
B.water-hungry tomato plants are more sensible than tobacco plants
C.unstressed plants produced sounds of laughter when being watered
D.plants respond to the sounds the plants make and protect themselves
2.What is Anne Visscher’s attitude towards the finding of the experiment?
A.Appreciative B.Doubtful
C.Cautious D.Optimistic
3.It can be learnt from the research that ________.
A.greenhouse effects can be avoided
B.soil condition can be adjusted in time.
C.plant condition can be diagnosed faster.
D.insects can be detected and removed easily.
4.What is the best title for the article?
A.Plants Get Stressed Just Like Us
B.Plants Scream in Presence of Stress
C.Sounds of Plants Detected Far Away
D.Sounds of Plants Break Farmers’ Hearts

高三英语阅读理解中等难度题查看答案及解析
书面表达
请阅读下面短文，并按照要求用英语写一篇150词左右的文章。
In recent years, internet voting has become increasingly popular in China. People not only cast on-line votes themselves, but also urge others to vote for competitions like the ＂Most Beautiful Teacher＂ and the ＂ Cutest Baby＂.
Li Jiang, a high school student, is invited to vote in the ＂ Best Police Officer＂ competition, organized by the local government to let the public have a better understanding of police officers’ daily work. Li Jiang visits the website and reads all the stories. He is deeply moved by their glorious deeds. He is already thinking of becoming a policeman himself in the future.
Su Hua is invited by his uncle to vote for his cousin in the ＂ Future Singer＂ competition. He has already received three similar invitations this week. His uncle tells him that if his cousin wins the competition, the family will win an overseas tour for free. Su Hua likes his cousin very much, but he finds other singers perform even better. To vote, or not to vote? This is a question that troubles him very much.
【写作内容】
1. 用约30个单词写出上文概要；
2. 用约120个单词阐述你对网络投票的看法，并用2~3个理由或论据支撑你的看法。
【写作要求】
1. 写作过程中不能直接引用原文语句；
2. 作文中不能出现真实姓名和学校名称；
3. 不必写标题。
【评分标准】
内容完整，语言规范，语篇连贯，词数适当。

高三英语书面表达中等难度题查看答案及解析
书面表达
请阅读下面短文，并按照要求用英语写一篇150词左右的文章。
In recent years, internet voting has become increasingly popular in China. People not only cast on-line votes themselves, but also urge others to vote for competitions like the “Most Beautiful Teacher” and the “ Cutest Baby”.
Li Jiang, a high school student, is invited to vote in the “ Best Police Officer 冶 competition, organized by the local government to let the public have a better understanding of police officers’ daily work. Li Jiang visits the website and reads all the stories. He is deeply moved by their glorious deeds. He is already thinking of becoming a policeman himself in the future.
Su Hua is invited by his uncle to vote for his cousin in the “ Future Singer冶 competition. He has already received three similar invitations this week. His uncle tells him that if his cousin wins the competition, the family will win an overseas tour for free. Su Hua likes his cousin very much, but he finds other singers perform even better. To vote, or not to vote? This is a question that troubles him very much.
【写作内容】
1. 用约30个单词写出上文概要；
2. 用约120个单词阐述你对网络投票的看法，并用2 ~3个理由或论据支撑你的看法。
【写作要求】
1. 写作过程中不能直接引用原文语句；
2. 作文中不能出现真实姓名和学校名称；
3. 不必写标题。
【评分标准】
内容完整，语言规范，语篇连贯，词数适当。

高三英语书面表达中等难度题查看答案及解析
请阅读下面短文，并按要求用英语写一篇150词左右的文章。
In recent years, internet voting has become increasingly popular in China. People not only cast on-line votes themselves, but also urge others to vote for competitions like the “Most Beautiful Teacher” and the “Cutest Baby”.
Li Jiang, a high school student, is invited to vote in the “Best Police Officer” competition, organized by the local government to let the public have a better understanding of police officers’ daily work. Li Jiang visits the website and reads all the stories. He is deeply moved by their glorious deeds. He is already thinking of becoming a policeman himself in the future.
Su Hua is invited by his uncle to vote for his cousin in the “Future Singer” competition. He has already received three similar invitations this week. His uncle tells him that if his cousin wins the competition, the family will win an overseas tour for free. Su Hua likes his cousin very much, but he finds other singers perform even better. To vote, or not to vote? This is a question that troubles him very much.
（写作内容）
1.用约30个单词写出上文概要；
2.用约120个单词阐述你对网络投票的看法，并用2~3个理由或论据支撑你的看法。
（写作要求）
1.写作过程中不能直接引用原文语句；
2.作文中不能出现真实姓名和学校名称；
3.不必写标题。
（评分标准）
内容完整，语言规范，语篇连贯，词数适当。
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高三英语读写任务困难题查看答案及解析
阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
In recent years, internet voting has become 1.________（increase）popular in China. People not only cast on-line votes 2.________ (them), but also urge others to vote for 3.________ (compete)
like the “Most Beautiful Teacher” and the “ Cutest Baby”.
Lin Yue, a high school student, is invited to vote in the “Best Police Officer ”, 4.________ (organize) by the local government to let the public have 5.________ better understanding of police officers’ daily work. Lin Yue visits the website and reads all the stories. He is deeply moved by their 6.________ (glory) deeds. He is already thinking of becoming a policeman himself in the future.
Wu Hua is invited by his uncle to vote for his cousin in the “Future Singer”. He7.________ (receive) three similar invitations so far . His uncle tells him 8.________ if his cousin wins it, the family will win an overseas tour 9.________ free. Wu Hua likes his cousin very much, but he finds other singers perform 10.________ better. To vote, or not to vote? This is a question that troubles him very much.

高三英语语法填空中等难度题查看答案及解析
In a 2013 study, it was reported that almost 66 percent of recent high school graduates went to college, a 4 percent decline since 2009, when college enrollment(入学) reached an all-time high.
So, what are the other 35 percent of high school graduates doing after they walk out of their school for the last time? Here are what some Robinson High students have planned.
For Robbie Claiborne, graduation means the start of a military career.He plans to join the Coast Guard after graduation."I was born around the ocean.I love the water.I want to fight for my country and for what I love," said Claiborne.
Others just want a break from school."I really want to take a gap year," Liliam Clavijo said."I'd really love to work in Spain for a year before going to college."
Most students, however, are rather excited.Eban Trunk, a junior, has been planning his future career since middle school."I really want to be a mailman.It just seems like a cool job.Everyone loves the mailman," Trunk said."One day the idea just came to me, and I knew that was what I wanted to do."
For many students, a high school diploma means more choices."I'm not really sure what I'll do after high school," senior Joshua Loring said."I might do technical school.I'm in auto shop classes right now."
Meanwhile, Cassidy Grunderson plans on working at Busch Gardens full time."I just want to live on my own, get a job and move out," Grunderson said.
Stephen Hambleton, who teaches auto tech classes at Robinson, says many of his students choose to enter the automobile industry after graduation."It's an instant job, and after taking years of auto shop in high school, it's easy to get hired," he said.Several seniors in his class, including Loring, plan to enter the industry upon graduation.
"College isn't for everyone, and I really respect people who decide to do their own thing," said Coleman Parks, a senior student."I think too many people feel that they're only as valuable as their degree."
Graduates are proving that college isn't the only option when high school ends.
1.What can we learn from the study in 2013?
A.College enrollment in 2013 reached the highest point in history.
B.College enrollment in 2013 is not as high as that in 2009.
C.Only a small number of graduates go to college after graduation.
D.Some students fail to graduate from senior high school.
2.What is the meaning of the underlined phrase “a gap year”?
A.a year of differences
B.a year of many choices.
C a year between senior high graduation and college.
D.a year between college graduation and workplace.
3. According to the passage, which of the following is TRUE?
A.Cassidy Grunderson plans to enter the automobile industry upon graduation
B.For many students, a high school diploma gives them limited choices.
C.Senior high school graduates are faced with more choices than just going to college.
D.Eban Trunk plans to work in Spain for a year.
4.What might be the best title for the story?
A.Fewer Senior High Graduates Go to College
B.Cool Jobs for Senior High Graduates
C.Gap Year or College?
D.Confused Senior High Graduates

高三英语阅读理解中等难度题查看答案及解析
A recent experiment held in Japan shows that it is almost impossible for people to walk exactly straight for 60 metres. Tokyo University of Agriculture and Technology found 20 healthy men and asked them to walk as straight as possible to a target 60 metres away at normal speed. Each man had to walk on white paper fixed flat to the floor wearing wet colored socks. The footprints revealed that all walked in a winding rather than a straight line. Researchers found that people readjust the direction of walking every few seconds. The amount of the winding differed from subject to subject. This suggests that none of us can walk in a strictly straight line. We walk in a winding way mainly because of a slight structural or functional imbalance of our limbs (四肢). Although we may start walking in a straight line, several steps afterwards we have changed direction.
Eyesight helps us to correct the direction of walking and leads us to the target. Your ears also help you walk. After turning around a lot with your eyes closed, you can hardly stand still, let alone walk straight.
It’s all because your ears help you balance. Inside your inner ear there is a structure which contains liquids. On the sides of the organ are many tiny hair-like structures that move around as the liquid flows. When you spin (旋转) the liquid inside also spins. The difference is that when you stop, the liquid continues to spin for a while. Dizziness is the result of these nerves in your ear. When you open your eyes, although your eyesight tells you to walk in a straight line, your brain will trust your ears more, thus you walk in a curved line.
1.The experiment held in Japan proved that _______.
A. the participants kept readjusting their direction of walking
B. all the participants had a good sense of direction
C. the experiment was done in different ways
D. none of the participants finished the 60 metres
2.The underlined word “subject” in Para. 1 refers to ________.
A. a person with a functional imbalance
B. a person chosen to be studied in an experiment
C. the subject one studies at school
D. the direction of walking
3.The purpose of writing the article is to ________.
A. prove that ears and eyes help us to walk straight
B. explain why we can hardly walk in a strictly straight line
C. point out the importance of noticing everyday science
D. give background information about a latest study

高三英语阅读理解中等难度题查看答案及解析
Three-Dimensional （3D） movies have been becoming more and more popular in recent years．It seems 3D TV sets may be going into family households in the near future．While new digital 3D technology has made the experience more comfortable for many, for some with eye problems, long 3D viewing may result in an aching head, doctors say．
"There are a lot of people walking around with very minor eye problems, which under normal situations, the brain deals with naturally," said Dr Michael Rosenberg, an ophthalmologist （眼科医师） in Chicago．He said in a 3D movie, these people face a completely new sensory experience．"That translates into greater mental effort, making it easier to get a headache," Rosenberg told Reuters．
In normal vision, each eye sees things at a slightly different angle．"When that gets processed in the brain, that creates the perception （感觉） of depth," said Dr Deborah Friedman, an ophthalmologist in New York．The images people see in three dimensions in the movies are not calibrated （校准的） in the same way that their eyes and brain are．"If your eyes are a little off to begin with, then it's really throwing a whole degree of effort that your brain now needs
to exert （竭尽全力）," he said．
Dr John Hagan, a Kansas City ophthalmologist, said some people who do not have normal depth perception cannot see in 3D at all．He said people with eye muscle problems, in which the eyes are not pointed at the same object, have trouble processing 3D images．
Rock Heineman, a spokesman for RealD, a provider of 3D equipment to theaters, said headaches and nausea were the main reasons 3D technology never took off．
Heineman said older 3D technology used two film projectors（放映机）, one that projected a left-eye image and one that projected a right-eye image．Three-D glasses would allow viewers to see a different image in each eye．
"People often complained of headaches and it was really because the projectors weren’t lined up," Heineman said．
Now his company has developed a new single digital projector, which switches between the left and the right-eye image 144 times a second, to help overcome some of the old problems．
"By going to a single digital projector, those problems were solved," he said．Friedman said he thinks most people will do fine with 3D movies and with 3D TVs, but Rosenberg said people may quickly tire of the novelty （新鲜事物）．"I suspect there will be a lot of people who say it's sort of neat, but it's not really comfortable," he said．
1.The text is mainly about ____．
A．the reasons why people like 3D movies
B．how to improve 3D technology
C．the development of 3D technology in recent years
D．causes of headaches and nausea when people watch 3D movies
2.The underlined phrase "took off" could be replaced by "______"．
A．became popular
B．flew in the sky
C．left hurriedly
D．removed one's clothes
3.This article implies that _____．
A．people do not like new things like 3D movies
B．3D TVs will completely take the place of old TV sets
C．3D technology is the most important technology ever
D．those with eye muscle problems should not watch 3D movies
4.We can learn from what Rosenberg said in the last paragraph that
A．a single digital projector could solve all the problems with 3D technology
B．people will gradually become comfortable with 3D movies and TVs
C．the appeal of 3D movies and "TVs may fade
D．most people will actually enjoy the 3D experience

高三英语阅读理解中等难度题查看答案及解析