Imagine having an ear made out of an apple. It seems like a crazy idea. But it could happen in the near future.

Canadian biophysicist Andrew Pelling used an apple to grow a human ear. He thinks fruit and vegetables can be used to cheaply repair human body parts in the future.

Scientists have been trying to grow organs in labs to replace our old ones. But it‘s a hard job. In the past, scientists have used man-made materials, animal parts and even dead people as scaffolds（支架）. But that has proved to be difficult and expensive.

Pelling and his team, however, found the apple to be a cheap and easy-to-use scaffolds.They first cut an apple into the shape of an ear. Then they used a special way to take out the apple‘s cells（細(xì)胞）and make it a scaffold. The team then added human cells to the apple, and watched it grow. “You can implant（移植）these scaffold into the body, and the body will send in cells and a blood supply and actually keep these things alive, ” Pelling said during a Ted Talk speech.

The team put the apple scaffold inside a living mouse and the mouse’s cells slowly take over the pieces of the apple.

Now Pelling is thinking of the other fruit, plants or vegetables to use.

1.Andrew Pelling is a scientist who studies

A.body and organs B.biology and organ

C.physic and body D.biology and physics

2.What did Pelling and his team use as scaffolds?

A.Fruits. B.Animals. C.dead people D.man-made

3.According to Paragraph 4, the right order is________.

①M(fèi)ake the apple a scaffold.

②Cut an apple into the shape of an ear.

③Implant this scaffold into the human body.

④Add human cells to the apple scaffold.

A.①④②③ B.②①④③ C.②①③④ D.④①③②

4.How will the body keep the implanted scaffolds alive?

A.By repairing the scaffolds. B.By replacing the scaffolds.

C.By taking over the scaffolds. D.By sending in cells and a blood supply

5.What‘s the best title of the passage?

A.Scaffolds and cells B.Organs and cells

C.Organs Made of Apples D.Scientists and apples

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：初中英語(yǔ) 來(lái)源：2020年黑龍江省哈爾濱市中考一模英語(yǔ)試卷 題型：單選題

—What is she busy doing?

— She is doing with the machine that she had ________ two weeks ago.

A.repaired B.it repaired C.it to repair

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：湖南省2019-2020學(xué)年八年級(jí)上學(xué)期期末英語(yǔ)試卷 題型：閱讀單選

Before winter arrives, many kinds of birds start to fly south. People often call it migration. How much do you know about migration? Why do only some birds migrate? How do birds know when to go south? Can they find their way?

Some birds fly south because they may die from hunger if they don't do that. The woodpecker(啄木鳥),for example, doesn't need to fly south because it can find something to eat in the bark(樹皮) of the trees. But some birds eat grains(谷物). Their food disappears in winter, so they must fly south where food can still be found. But why don't they stay there forever? Perhaps they know if they stay in the south, they will eat up food there, too.

Birds seem to know when winter comes because they find that the days are getting shorter in winter. Once they leave from the north, the sun is really helpful. The sun is in different positions in the sky at different time of a day. Birds know the time of the day by watching the position of the sun. On long flights, most of the birds use stars to navigate(導(dǎo)航) their way.

The homing pigeon(信鴿) doesn't use the sun or the stars. Scientists believe that it uses the magnetic field(磁場(chǎng)) of the earth. One of the most amazing migrations is that of the tiny hummingbird(蜂鳥). It travels from Canada to Mexico—a long distance of over 3600 kilometers.

1.The underlined word “migration” in the first paragraph means________

A.looking for food B.practicing flying C.moving to another place

2.The birds which eat grains fly south in winter mainly because________

A.they like warm weather better.

B.they really need food.

C.it is one of their habits.

3.On long migration flights, most birds find their way with the help of________

A.the stars B.the magnetic field C.the sun

4.Which of the following is NOT TRUE according to the passage?

A.The woodpecker doesn't need migration.

B.Many birds migrate in the middle of winter.

C.The hummingbird can fly to Mexico for food in winter.

5.What is the main idea of the passage?

A.The different ways birds use to migrate.

B.The reasons why many birds migrate in winter.

C.The mystery(奧秘) of birds' migration.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：重慶市2019-2020學(xué)年九年級(jí)下學(xué)期3月月考英語(yǔ)試卷 題型：回答問(wèn)題

閱讀下文并回答問(wèn)題。

Have you ever wished you could change something about your body? If so, you’re not alone.

Many people use apps like MeituXiuxiu to beautify photos before putting them on social media. Some teenagers are even having plastic surgery (整容術(shù)) at an early age. Zeng, a senior 2 student from Chengdu, had a double eyelid surgery (雙眼皮手術(shù)) done this summer. She and many of her classmates believe bigger eyes look more beautiful.

As teenagers’ bodies grow and change, they become afraid of the smallest flaw(缺陷) in their looks. They are very worried about it. This can even influence their health.

According to Huxiu News, over 60 percent of girls refuse to take part in some daily activities such as going to school, because they feel bad about their looks. As much as 31 percent of teenagers do not want to speak up in class because they worry that others will notice their looks.

One of the main causes is advertising, TV shows and social media. Pictures of “perfect” faces and bodies are everywhere. They suggest that having large eyes, pale skin and skinny bodies is the only way to be beautiful. Magazines give tips about how to lose weight “in days”. Advertisements suggest that you should whiten your skin using certain products. And TV shows often make fun of overweight characters. Seeing all these things can make people believe that they should change their bodies.

So what should we do? According to Nancy Etcoff of the Harvard Medical School, “We need to help young people in many ways. These ways can include educating students about body confidence in school, as well as encouraging parents to talk to their kids about this topic. After all, beauty comes in all shapes and sizes,” Etcoff said.

1.Do many teenagers have plastic surgery at an early age?

___________________________________________________________________________________

2.What is the only way to be beautiful according to advertising, TV shows and social media?

_________________________________________________________________________________

3.What does it mean by saying “…, beauty comes in all shapes and sizes.”?

________________________________________________________________________________

4.What can you do to make yourself look and feel best? Please list two ways.

_________________________________________________________________________________

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：重慶市2019-2020學(xué)年九年級(jí)下學(xué)期3月月考英語(yǔ)試卷 題型：完型填空

“Look, it’s Baldy (禿子)!” A boy shouted in my direction across the playground. Even though I was used to this kind of insults (侮辱) because of the scars (傷疤) on my head, it was still horrible to hear. I felt so sad as I headed back to the class.

When I was just 20 months old, I suffered serious burns after a bowl of hot oil fell on my head. I was rushed to hospital and had to stay there for weeks while the doctors fought to save my life. “Holly’s very lucky to be _______________,” they told Mum and Dad. “But she’ll be ________________ with scars on her head, and of course her hair won’t grow there.”

As a child, I cared much about my scars, so I usually wore a ________________ to cover them up when I left home. If I didn't, people would call me horrible names like Baldy. ________________ my friends were always comforting me, they never really understood how it felt.

Then through the hospital, I was introduced to a children’s burns camp, where children like me can get any help. There, I __________________ 14-year-old Stephanie, whose burns are a lot more serious than mine. But she is _________________ strong that she never lets anyone put her down. “You shouldn’t listen to what people say about what you look like because we’re not different from ________________ else, Holly,” she encouraged me. “And you don’t need to wear a scarf because you look great without it!” __________________ the first time in my life I could speak to someone who’d been through something similar. So weeks later, at my 13th birthday party, encouraged by her bravery, I _______________ up my scarf and showed off my scars. It felt amazing not having to hide away behind my scarf.

Now, I am _________________ of what I look like and much happier, because I have realized it is your personality that decides who you truly are.

1.A.live B.life C.alive D.lively

2.A.leaves B.left C.leaving D.to leave

3.A.scarf B.hat C.tie D.hairband

4.A.Unless B.Although C.If D.Until

5.A.heard B.realized C.met D.helped

6.A.such B.too C.very D.so

7.A.someone B.nobody C.anybody D.no one

8.A.At B.For C.In D.During

9.A.gave B.put C.took D.looked

10.A.afraid B.excited C.upset D.proud

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：福建省廈門市2018-2019學(xué)年九年級(jí)上學(xué)期10月月考英語(yǔ)試卷 題型：單選題

一The game is too hard for me. I will certainly lose. —________. You never say no before you try.

A.Come on! B.Forget it! C.Pardon me?

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：福建省廈門市2018-2019學(xué)年九年級(jí)上學(xué)期10月月考英語(yǔ)試卷 題型：單選題

—Could you tell me the way to the bank?

—Sure. Walk straight and then turn right. Go ________a bookstore. The bank is next to it.

A.through B.into C.past

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：江蘇省2019-2020學(xué)年九年級(jí)下學(xué)期線上教學(xué)調(diào)研英語(yǔ)試卷 題型：單選題

—Kitty is very good at musical instruments.

—Yes, she is. She can play the guitar almost her guitar teacher.

A.as better as B.as good as C.as well as D.so well as

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：福建省廈門市2017-2018學(xué)年七年級(jí)下學(xué)期期中英語(yǔ)試卷 題型：閱讀單選

Tang Dynasty poet Du Mu wrote a famous poem (詩(shī)). It describes a scene (景象) in early April: “A drizzling rain (毛毛雨) falls like tears on the Mourning Day; The mourner’s heart is going to break on his way”.

The poem is about qingming, or Tomb-Sweeping Day, a Chinese holiday. People use this day to remember the dead ( 逝者). It falls on April 5 this year.

On this day, people go to the tombs (墓地) of their dead family members. They sweep (清掃) and clear away grass around the tombs. After that, they put flowers or food in front of the tombs. They hope the dead can enjoy them.

Tomb-Sweeping Day is also a popular time to start gardening and do other outdoor activities. Families often fly kites or get together for outings during this time.

1.The translation (翻譯) of the underlined part is________ .

A.渭城朝雨浥輕塵，客舍青青柳色新。

B.清明時(shí)節(jié)雨紛紛，路上行人欲斷魂。

C.行宮見月傷心色，夜雨聞鈴腸斷聲。

2.The other name for qingming is________.

A.Tang Dynasty B.Tomb-Sweeping Day C.A Chinese Holiday

3.________is qingming this year.

A.April 5 B.April 1 C.Early April

4.What do people NOT do on April 5?

A.Sweep and clear away around the tombs

B.Put flowers or food in front of the tombs

C.The dead enjoy the food

5.People often________ besides (除了) going to the tombs during this time.

A.do other indoor activities B.get together for singing C.start gardening, fly kites or go outings

查看答案和解析>>

同步練習(xí)冊(cè)答案