[题目] Scientists in the U.S. have created an artificial sunflower less than 0. 04 inches wide that can bend towards a light source and harvest solar energy. The flowers were found to be about 400 perce 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】 Scientists in the U.S. have created an artificial sunflower less than 0. 04 inches wide that can bend towards a light source and harvest solar energy. The flowers were found to be about 400 percent more efficient than other equipment, making them promising technology for solar power potentially even as a power source for solar-based spaceships.

The team, led by researchers from the University of California, Los Angeles, was looking to improve. the efficiency of solar cells by modeling after a feature of nature-phototropism. This is where a plant adjusts itself to face the sun, getting the most amount of energy it can get. In a study published in Nature Nanotechnology, the team said it was a 'big challenge'.

However, this problem has now been overcome. The team has developed a polymer(聚合物) that is responsive to being simulated by light, The system, which they have named SunBOT for short, is able to instantly explore and track a light source. It can do this across a range of temperatures without power supply or any human intervention.

The researchers used the polymer to create a 'stem'. Then they placed a material commonly used in solar cells on its top, representing the 'flower'. When the team shone a light at the SunBOTs, the polymer began heating up and shrinking, causing the stem to bend so the flower faced the light.

The researchers tested their artificial sunflowers to see how efficient they were at harvesting solar energy Findings showed they were up to 400 percent more effective than non-phototrophic materials.

The practical applications of SunBOTs are some way off. The study shows a proof of concept, but the technology will need to be scaled up to be used commercially. However, the team is confident it could one day be used a across a broad range of industries.

This work may be useful for solar harvesters signal revere smart windows, self-contained robotics solar sails for spaceships and intelligent energy generation (for example, solar cells and biofuels), the scientific team said.

【1】Why do the scientists create the artificial sunflower?

A.To prevent pollution.B.To protect sunflowers.

C.To reuse green energy.D.To warn us of the energy crisis.

【2】What can we learn about SunBOTs?

A.SunBOTs are likely to be too limited in future use.

B.There is some time before SunBOTs are put into markets.

C.Scientists are still not sure of the function of SunBOTs.

D.SunBOTts are not efficient, though advanced, in collecting energy.

【3】Where can we read such a text?

A.In an education report.B.In a market report.

C.In an experiment report.D.In a science report.

【答案】

【1】C

【2】B

【3】D

【解析】

这是一篇说明文。本文主要介绍了一种可以收集太阳能，然后将收集的能量供其他设备使用的人造向日葵，包括它的工作原理、目前的问题等。

【1】

推理判断题。根据第一段The flowers were found to be about 400 percent more efficient than other equipment, making them promising technology for solar power potentially even as a power source for solar-based spaceships. (这些花被发现比其他设备的效率高出400%，这使得它们成为使用太阳能的一项很有前景的技术，甚至可以作为太阳能飞船的动力)可推测，科学家发明人造向日葵的目的是为了重复、高效地利用太阳能。C. To reuse green energy.(重复使用绿色能源)符合以上说法，故选C项。

【2】

推理判断题。根据倒数第二段的The study shows a proof of concept, but the technology will need to be scaled up to be used commercially. However, the team is confident it could one day be used a across a broad range of industries.(这项研究证明了这个概念，但是这项技术还需要扩大规模才能投入商业使用。然而，该团队相信，该技术有一天会在广泛的行业中得到应用。)可推测，SunBOT还要一段时间才能上市。 B. There is some time before SunBOTs are put into markets.( SunBOT离上市还有一段时间)符合以上说法，故选B项。

【3】

推理判断题。根据文章的主要内容，尤其是第一段的Scientists in the U.S. have created an artificial sunflower less than 0. 04 inches wide that can bend towards a light source and harvest solar energy. (美国科学家发明了一种不足4英寸的人造向日葵，这种人造向日葵可以弯向光源并收集太阳能)可知，本文主要介绍了一种可以收集太阳能，然后将收集的能量供其他设备使用的人造向日葵。这是一项科学发明，由此推测，我们很有可能在一篇科学报道上看到这篇文章。D. In a science report.(在一个科学报道上)符合以上说法，故选D项。

练习册系列答案

Dachi was the name of my pet cockatiel. His name comes from the second half of the Japanese word tomodachi, 【1】means friend.

I taught Dachi to whistle two songs, “For He’s A Jolly Good Fellow” and “Happy Birthday to You”. Though his whole range of skills was small, his 【2】 (confident) never lagged (滞后), and he would frequently wish me a happy birthday when it wasn’t — which could be 【3】 (embarrass).

When Dachi had been with us for three or four years, I think I may have become a bit too confident with him. One day, I didn’t realize that he was still sitting on my shoulder 【4】 until the door behind me shut loudly. He 【5】 (fly) away.

After I placed 【6】an advertisement in the local paper, I received a phone call from a woman. I was so relieved to hear this news that I 【7】 (immediate) drove to her house. When I arrived, she asked me to see whether the bird was 【8】(my).

I had a better idea 【9】 (identify) Dachi and began to whistle the “Happy Birthday” song. The lady stopped me, saying, “He is yours alright — he’s been whistling that all week.”

So Dachi came home in the car 【10】 (sit) on my shoulder, whistling.

【题目】 There are some of history's most inspiring and great females who can be found on the pages of these novels.

Elizabeth Bennet Called "Lizzie" or “Eliza" by her family and friends, Elizabeth Bennet is the stubborn and clever heroine in Jane Austen's 1813 novel Pride and Prejudice. She's the second eldest of five daughters in the Bennet family and, like the rest of her sisters, she is expected to marry for status and money, not for love. To remain true of herself, she would rather remain single, a concept that was unheard at the time.

Nancy Drew She first appeared in 1932 but remains one of the most iconic female characters in all of literature. Created by Edward Stratemeyer, Nancy Drew isn't simply a pretty girl. Instead, the bold, physically strong, and fiercely intelligent Nancy uses her superior intelligence — not her look --- to solve a series of mysteries.

Josephine March Jo March is the second eldest daughter in the March family and is a central focus in the novel Little Woman, published by Lousia May Alcott in 1868. Jo struggles with challenges from society's expectations of how women in the 19th century should carry themselves, making her one of literature’ s most daring female characters.

Hester Prynne Recognized by some critics as one of the most important characters in female literature, Hester Prynne is the leading character in Nathaniel Hawthorne's 1850 novel, The Scarlet Letter. Married but separated by distance from her husband, Hester has an affair with a minister and becomes pregnant.

【1】Why would Elizabeth Bennet rather remain single?

A.She doesn't want to cheat herself.B.She doesn't want to marry for love.

C.She was the eldest daughter of the family.D.She is too clever.

【2】What is Nancy Drew like?

A.Kind.B.Clever.C.Outspoken.D.Proud.

【3】What is the right order of the time these females appeared in novels?

a. Elizabeth b. Nancy Drew c. Josephine March d. Hester Prynne

A.dcab.B.cdba.C.adbc.D.adcb.

【题目】China’s maternal and infant goods ecommerce platforms ________ heavily and speeding up their steps to expand offline channels.

A.investB.are investingC.are investedD.have invested

【题目】假定你是李华，你的新西兰朋友Peter给你发邮件，表示想了解有关中国谚语(Chinese proverbs)的知识及其学习方法。请你给他回封邮件，内容包括：

1. 中国谚语的由来(人们的智慧和经验，口头传承)；

2. 中国谚语的特点(简短而富有意义)

3. 实用的学习方法。

注意：1. 词数100左右；

2. 可以适当增加细节，以使行文连贯。

Dear Peter,

_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Yours,

Li Hua

【题目】Leonardo da Vinci and Nature

In the modern world, art and science are two very separate activities, but in Leonardo’s time they were closely connected. Science meant mathematics and medical studies.【1】Mathematics included practical work like surveying land for making maps as well as measuring the movements of the stars in the sky. An artist might need to measure the different parts of the body. He could also use mathematics to place things in relationship to each other in a drawing or painting so the scene looked correct.【2】

Mathematics was also connected to music because musical sounds have a fixed relationship with each other that can be described in numbers.【3】More than this, though, Leonardo believed that numbers were a part of all things in the world, including music, and he said that “without them nothing can be done.”

“Nature has kindly given us things everywhere to copy,” wrote Leonardo. In all his activities, Leonardo was trying to discover the rules that control nature. In his search for those rules, he looked very carefully at a lot of examples and details. Actual experience was more important to him than opinion, and he worked from facts to ideas.【4】 His purpose was to examine the world so he could copy it in beautiful paintings and sculptures. He also wanted to learn from the clever solutions of nature.

【5】 His quick little sketches, often done while wandering outside, helped him to catch a movement or a shape. More careful drawings would be done at a desk with a pen and ruler. In July 2001, a small drawing by Leonardo was sold for $12 million. It was the most expensive drawing in the world.

A.Leonardo was always drawing.

B.How could these be connected with art?

C.Leonardo was also an influential philosopher.

D.Mathematicians and doctors worked to discover the unknown.

E.Above all, Leonardo wanted to understand how and why things worked.

F.Leonardo himself was a very good musician and liked to play an instrument and sing.

G.You will see a good example of such positioning in the painting of The Last Supper.

【题目】阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Kip Keno, an untrained Randi tribesman, was already 28 years old, 【1】 he made his second Olympic appearance at the 1968 Mexico City Games. Suffering from violent stomach 【2】 (cause) by a gall bladder infection, Keno entered the 10,000 m. He was running with the leaders when, with two 【3】(circle) to go, he doubled up with pain and fell onto the field. He jumped back up and finished the race, 【4】 he was canceled qualification for leaving the track.

Four days later, he earned a silver medal in the 5,000 m, 【5】 (leave) behind Mohamed Gammon of Tunisia by narrowly a metre. In the 1,500 m, Keno tried to defeat the finishing kick of the favourite, Jim Ryan, by building up a huge lead. His strategy worked and he 【6】 (win) by 20 m, the 【7】(large) advantage of victory in the history of the event.

In 1972, Keno entered the steeplechase (障碍赛) even though he had little experience in 【8】event. Still, he was able 【9】( defeat) teammate Ben Jericho and won another gold medal. Six days after this victory, he added a silver medal in the 1,500 m, winning a good medal.

Keno and his wife, Phyllis,【10】 (eventual) established a children's home and school for orphaned and abandoned children.

【题目】This information allowed our soldiers to prepare mentally and ______ the actions they would be required to take.

A.imitateB.appreciateC.anticipateD.equate

【题目】请阅读下面文字，并按照要求用英语写一篇150词左右的文章。

A video showing a traffic police officer pretending to be blind being denied permission to get on a bus with a guide dog has been drawing public attention and has led to heated online discussions about the lack of support and care for the visually impaired(视觉障碍人士). As shown in the video, wearing a blindfold, the officer wasn't allowed on the bus with the guide dog, and was told no dogs are allowed whether they're guide dogs or not. Some passengers also scolded the officer for making a scene and wasting their time, while the dog appeared very distressed.

The guide dog's owner Gao Zhipeng, who is visually impaired, told media Monday that this has been happening almost every day since he brought Taobao home in 2014，and it is the same when catching a cab. And each time they were refused, Taobao would sink into depression for days.

The guide dog being denied boarding is just the tip of the iceberg, compared to the various difficulties faced by the country's visually impaired population every day when they leave their home.

（写作内容）

1. 用约30个单词概述上述信息的主要内容；2. 用约120个单词发表你的观点，内容包括：(1) 表达你对此事件的看法，并说明理由；(2) 关于如何帮助视觉障碍人士，请你提出2～3个建议。

（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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