【題目】People often have difficulty facing reality when further scientific discovery challenges _______ they have previously thought to be settled facts.

A.whatB.thatC.whoD.which

【答案】A

【解析】

考查名詞性從句。句意：當(dāng)進(jìn)一步的科學(xué)發(fā)現(xiàn)對他們之前認(rèn)為是既定事實的東西發(fā)起挑戰(zhàn)時，人們通常很難面對現(xiàn)實。分析句子可知，空白處做challenges（挑戰(zhàn)）的賓語，且引導(dǎo)賓語從句，在從句中做thought（認(rèn)為）的賓語，稱之為“雙重成分”，用what。故選A項。

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源： 題型：

【題目】假如你是李華，你看到美國留學(xué)生Sharon在網(wǎng)上發(fā)帖，希望有人能夠幫助她提高普通話（Mandarin）水平。請根據(jù)以下提示用英語給她寫一封電子郵件：

1. 表達(dá)給她提供幫助；

2. 說明你能勝任輔導(dǎo)；

3. 列舉你的提高計劃。

注意：

1. 字?jǐn)?shù)80詞左右；

2. 可以適當(dāng)增加細(xì)節(jié)，以使行文連貫。

_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】 Wood has many great characteristics that make it the perfect building material. It is cheap, durable(耐用的), easily available, and most importantly, environmentally sustainable. The one thing it is not, is transparent(透明的).Now thanks to a team of scientists at Stockholm’s KTH Royal Institute of Technology, the material may even be able to add that feature to its already impressive list.

Lead researcher Dr. Lars Berglund said he was inspired to create the transparent wood after learning how Japanese researchers had developed a see-through paper for use in flexible display screens for electronic devices.

The team began by pulling out the wood’s lignin (木質(zhì)素). The lignin-free wood was then dipped into a polymer (聚合物) and baked at a temperature of 158F for four hours. The result was a hybrid product that was not only stronger and lighter than the original wood but also, almost transparent. The researchers were able to adjust the level of transparency by varying the amount of the polymer injected and also by changing the thickness of the wood.

While scientists have previously created a see-through wood for small-scale applications like computer chips, the transparent wood is the first one being considered for large scale applications. The researchers, who revealed their findings in Biomacromolecules on April 11, picture using the transparent wood in buildings to allow for more natural light, or to create windows that let in the desired amount of light without sacrificing privacy.

Wood that allows light to pass through could lead to a brighter future for homes and buildings. Berglund also thinks the wood could play a significant role in the design of solar panels. The semi-transparent material would be able to keep light longer and give it more time to interact with the conductor, thus resulting in better solar efficiency.

Additionally, substituting the currently used glass with this new product would help solar energy manufacturers improve their carbon footprint and lower the cost. They are now experimenting with ways to scale up the manufacturing process so that the transparent material is cost-effective to make and easy to use.

【1】What does the underlined part "that feature" in Paragraph 1 refer to?

A.Cheapness.B.Durability.

C.Sustainability.D.Transparency.

【2】Which of the following is not the process in which the transparent wood is made?

A.Dip the wood into a polymer.B.Reduce the amount of the polymer.

C.Make the wood lignin-free.D.Bake the wood for some time.

【3】What’s the purpose of using the transparent wood in buildings?

A.To protect privacy.B.To scale out applications.

C.To get more natural light.D.To observe more clearly.

【4】What is the last paragraph mainly about?

A.The bright future of the transparent wood.

B.The wood’s role in the design of solar panels.

C.The disadvantages of the currently used glass.

D.Solar energy manufacturers’ carbon footprint.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】假定你是李華，正在英國的一所中學(xué)做交換生。你校的中國書法俱樂部正在招募成員，請 你給該俱樂部的負(fù)責(zé)人John寫一封郵件申請加入。內(nèi)容包括：

1.表明意圖；

2.給出理由；

3.期待回復(fù)。

注意：1.詞數(shù)100左右；

2.可以適當(dāng)增加細(xì)節(jié)，以使行文連貫。

參考詞匯：中國書法俱樂部Chinese Calligraphy Club;招募recruit

______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】假定你是李華，你的英國朋友Frank來信詢問你的寒假生活情況。請根據(jù)以下要點給他回信：

1. 由于冠狀病毒病爆發(fā)，假期被迫延長；

2. 寒假生活（在線上課、讀書、鍛煉身體等）；

3. 期盼開學(xué)。

注意：

1. 詞數(shù)80左右；

2. 可以適當(dāng)增加細(xì)節(jié)，以使行文連貫；

3. 信的開頭已為你寫好。

參考詞匯：冠狀病毒病COVID-19

Dear Frank,

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Yours,

Li Hua

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】 From talking robots and video phones, technology has become so advanced that the previously impossible seems to occur on a daily basis. And yet—we still have no cure for the common cold.

Why can’t we stop the common cold? According to Peter Barlow, a scientist at Edinburgh Napier University, the main challenge lies in the many different types of cold viruses that are produced by the rhinoviruses (鼻病毒). There are at least 160 types. They change so easily that they quickly become resistant to drugs. In other words, a single cure isn’t likely to work on every type of cold.

However, researchers from Stanford University have found a possible answer. They discovered a protein that the viruses need. Without it, they can't spread inside your body.

To identify the gene which produces the specific protein needed by the viruses, researchers used a gene-editing technique to test all genes one by one for thousands of cells. These modified (改變的) cells were then exposed to a range of rhinoviruses which cause the common cold.

All the viruses were unable to copy inside cells without a gene that produces a specific protein, called methyltransferase (甲基轉(zhuǎn)移酶) SETD3.

Then, they tested genetically modified mice, which were completely unable to produce the protein. The mice were able to live healthy, normal lives without the protein.

“Lacking that gene protected the mice completely from the common cold,” associate professor Jan Carette, from Stanford, told the BBC.

“These mice would always die, but they survived and we saw a very strong protection.”

Carette said the plan is to find a drug which can keep back the protein for a limited time, rather than produce genetically modified humans.

“We have identified a fantastic target that all rhinoviruses require and depend on. Take that away and the virus really has no chance,” said Carette.

【1】Why does the author mention talking robots and video phones in the first paragraph?

A.To stress the importance of technology.

B.To encourage readers to share their ideas.

C.To introduce the topic of the text.

D.To recognize the progress of science.

【2】What can we learn about the protein needed by the viruses?

A.It helps the viruses copy inside our bodies.

B.It stops the viruses from changing easily.

C.It protects the viruses against drugs.

D.It forces the viruses to spread fast.

【3】What does Jan Carette intend to do?

A.To identify a fantastic target.

B.To slow copying speed of some genes.

C.To produce genetically modified humans.

D.To find a drug to temporarily block the protein.

【4】What is the best title for the text?

A.A New Experiment on Viruses.

B.New Defense Found for Viruses.

C.A Chemical Curing Modified Viruses.

D.Gene-editing Technology to Control Viruses.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】 Growing up, Deka Ismail says she let labels define what she could be. “I was a black girl, from a refugee (難民) family,” Deka said. “It was as if I was only allowed to explore in this predetermined box.”

After a high school chemistry class inspired her to think about a career in science and gave her confidence in the field, Deka learned to live outside labels and began making big plans for her future. Now she is about to begin her freshman year at the University of California, planning to become a professor.

Born and raised in San Diego’s City Heights neighbourhood, Deka is the daughter of a Somali refugee couple. While some might say Deka’s success happened in spite of her background, she would say differently, that her experiences shaped her and inspired her to be the driven, young scientist that she is today.

When Deka was eight years old, her mother got a job by studying hard back in school in order to support the whole family. That made Deka realize that education could make a difference to one’s life. She spent a lot of time in the library reading books, and didn’t do many of the things her peers did, like partying or having romantic relationships.

“I always felt like I had to be the perfect girl for my family,” Deka said. “You have to not even do your best but two times better than everyone else. I felt like the whole world was waiting for me to mess up.”

Deka’s efforts paid off. The summer before her senior year of high school, she was accepted to the American Chemical Society Project SEED Programme. “She brought both enthusiasm and focus,” Botham, a researcher at this research institute, recalled. “She arrived every day ready to work, ready to learn and ready to tackle new challenges regardless of whether or not she had done anything similar.”

When asked what advice she would give to others like her, Deka warned them not to underestimate themselves. “Don’t tell yourself that scholarship is too big or this programme is too competitive or I’ll never get into this school, ” she said. “I was not sure whether I could make it until I started seeing the acceptance letters rolling in.”

【1】From the passage, we can learn that ______.

A.Deka was adopted by a refugee family

B.Deka spent a lot of time going to parties

C.Deka became a professor after graduation

D.Deka’s experiences drove her to work hard

【2】Deka realized the importance of education ______.

A.from her mother’s experienceB.after her chemistry class

C.by reading books in the libraryD.through working at the institute

【3】According to the last paragraph, Deka advised that students be ______.

A.patientB.confident

C.ambitiousD.generous

【4】What does the story intend to tell us?

A.Life is not all roses.

B.Practice makes perfect.

C.Well begun is half done.

D.Hard work leads to success.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】ARCTIC CIRCLE & NORTHERN LIGHTS TOUR

HIGHLIGHTS

Experience the Arctic Circle and amazing northern lights with us.

Cover a total of 400 miles in this 14-hour expedition.

Cross the broad Yukon River.

En-route, enjoy breathtaking views of Alaska, USA.

You may see moose, lynxes and foxes in their natural habitat.

ATTENTION: The Aurora Borealis (Northern Lights) is a natural phenomenon and can not be guaranteed. There is no refund (退款) if the Aurora Borealis does not appear.

PICKUP TIME

12:15 pm — 1:00 pm.

MEETING POINT

Your hotel in Fairbanks.

WHAT TO EXPECT

1:00 pm — Departure from Fairbanks.

Trans-Alaska-Pipeline. — Get a close-up view of the famous pipeline and learn interesting facts about the engineering and building period.

Arctic Circle — Have your picture taken at the Arctic Circle and receive your Arctic Circle Certificate.

Yukon River — Walk right to the edge of Alaska's most famous river.

3:00 pm — Arrival at your hotel in Fairbanks.

On the return journey to Fairbanks we pass many sites, which are perfect: for possible northern lights viewing.

We provide ham (or veggie) sandwich, chips, sweets, two bottles of water and hot drinks. Please feel free to bring extra food.

CANCELLATION POLICY

Cancellations 30 days ahead of tour date are subject to 5% banking charge.

Cancellations within 30 days are non-refundable.

IMPORTANT

A minimum of 2 people is required for online booking. Single travelers and short notice reservations (within 7 days of tour date) always' have to contact us for availability at info@1stAlaskaTours.com or 907-590-5900.

【1】Which service does the tour include?

A.Free airport pickup.B.A 14-hour group tour.

C.Three quick meals.D.Photo taking and printing.

【2】What can guests surely do on the tour?

A.See some wild animals.B.Enjoy amazing northern lights.

C.Get an Arctic Circle Certificate.D.Go through the Trans-Alaska-Pipeline.

【3】Which of the following cases is refundable?

A.Not seeing northern lights.B.Not crossing the Yukon River.

C.Booking within 7 days of tour date.D.Cancelling a month before tour date.

【4】Where can the text probably be found?

A.On a tour homepage.B.On a science website.

C.In a photography journal.D.In a geography textbook.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】短文改錯

A recent survey shows most students communicate with their parents regularly, and there are still some who think it embarrassed to share their feelings with their parents. Actually, everyone should attach important to family communication, because not only does it strengthen the bond of the family but also bridge the gap between parents and children. In addition to, sharing your personal problems and emotions will great help reduce the pressure on you. As a result, our confidence will be built up. As for my family, we have special dinner together every Saturday evening, over that everyone present takes turns to sharing one problem and the others try to offer solutions. In this way the whole family can enjoy every single bit of life.

查看答案和解析>>

同步練習(xí)冊答案