A team of Israeli scientists “printed” a heart with a patient’s own cells (细胞) first in the world, researchers say.
Past researchers had been able to print simple tissues (生物组织) without blood vessels (血管), the team said. The new development is the first time “anyone anywhere has successfully engineered and printed an entire heart filled with cells, blood vessels and so on,” Tal Dvir of Tel Aviv University told The Jerusalem Post.
Dvir and his team reported the findings Monday in Advanced Science. The heart, about the size of a rabbit’s, is too small for a human, but the process used to create it shows the potential for one day being able to 3D-print pieces and maybe full transplants (移植), the team said. Because the heart is made from the patient’s own biological material, it reduces the chance that the transplant would fail, according to the research paper. The team used fatty tissues, then separated and “reprogrammed” the materials. The cells that become heart cells were then created.
The development is being praised as a “major breakthrough” in medicine and one that could help battle heart disease, the leading cause of death in the United States, according to the U.S. Centers for Disease Control and Prevention. “Patients will no longer have to wait for transplants or take medicines to prevent their side effects,” Tel Aviv University said in a statement. “Instead, the needed hearts, lungs etc. will be printed, fully personalized for every patient.” The research is still a long way off from clearing the way to transplant the 3D-printed hearts into humans, the team says.
Dvir told the news organization Bloomberg that the heart the team printed will need another month before cells develop full to beat. Tests on animals would need to be done before the technology could be tried in humans, he added. It would take a whole day and billions, rather than millions, of cells to print a human heart, Dvir told Bloomberg.
But Dvir remains hopeful. “Maybe, in 10 years, such printers will be seen and used in the finest hospitals around the world,” he told The Times of Israel.
1.Why is the heart transplant less likely to fail?
A.Because the number of heart donators has been increasing.
B.Because the transplant technology has been improved.
C.Because the heart is created with the receiver’s own cells.
D.Because every hospital has easy access to such printers.
2.What can we infer about the 3D-printed heart?
A.This heart can be transplanted into humans immediately.
B.This heart has been printed just for rabbits due to the size.
C.It made heart transplant much less difficult than before.
D.The new technology hasn’t gained much praise in medicine.
3.Dvir’s attitude towards the future of the technology is___________.
A.positive B.worried C.doubtful D.unclear
4.What is the text mainly concerned with?
A.The personalized heart transplant.
B.Heart 3D-printed using human cells.
C.A scientist discovering a new technology.
D.Heart disease, the leading cause of death.
﹡After the fire, what now?
Bishop Patrick Chauvet, Notre Dame (巴黎圣母院)’s manager, admitted that the famous building would close for “five to six years” as he spoke with local business owners Wednesday. He added that it was unclear what the church’s 67 employees would be doing in the future. French President Emmanuel Macron said Tuesday that he wanted the church rebuilt in five years.
﹡What are the new rules?
While tourists can’t go inside the site itself, the area still may prove popular to those paying their respects. Visitors are welcome to write messages of support in both the main and local city halls.
The island that houses the church has been closed and the people there have been evacuated since the fire. Paris businessmen who depend on Notre Dame tourism are worried about the church’s future as well as their own.
﹡_________________________
It’s known that spring is a busy time for tourists in Paris. The travel company recommends people visit other places, like the Basilique Saint-Denis, the Sacre-Coeur and so on. Those who tend to observe church services during Holy Week are advised to go to Saint-Eustache.
﹡Looking ahead to rebuilding
It seems rebuilding can begin, since firefighters put out the fire early Tuesday, more than 12 hours after nearly 400 firefighters had battled the flames that changed the city’s skyline. Two policemen and one firefighter were not badly injured, according to the Paris Fire Service.
A large campaign to raise money already is underway to rebuild the church. Up to Wednesday, donations came to $1 billion.
1.What does the underlined word “evacuated” mean?
A.removed B.examined C.accused D.ruined
2.Which of the following subtitles can fill in the blank?
A.Saint-Eustache is favored by tourists.
B.Tour companies offer other choices.
C.Church culture develops fast in Paris.
D.The best time to visit Paris is spring.
3.According to the passage, what will happen after the fire?
A.The government will arrange work for 67 employees.
B.Visitors will be forbidden to leave messages anywhere.
C.Churches in Paris will also be examined and repaired.
D.More money will be donated for the rebuilding project.
假设你叫李华，你的一个朋友John刚从美国归来，邀请你参加本周日在他家举办的朋友聚会，但你不能参加，请你根据以下要点给他写以封电子邮件：
1.表达想参加的意思；
2.忙于准备考试；
3.由于感冒，身体不适；
4.表示歉意并另约时间。
注意：可适当添加细节以使行文连贯；字数100字左右，开头和结尾已给，不计入总词数。
Dear John,
I’m extremely sorry to tell you that I am unable to go to your party this Sunday.
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
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Yours truly,
Li Hua
双向翻译
The target audience is high-school teenagers. 1. 我们的目标是劝阻年轻人不要吸烟。Our research shows that young people care about their health and future. 2. We will educate them about the bad physical effects of smoking and how smoking affects those people around them. 3.我们将解释不吸烟的所有好处, such as saving money which can then be spent on other things. Our interviews also indicate that young people are concerned about what is cool and what their friends like. 4. We will show how smoking is not cool or attractive, because it makes people smell terrible, and gives them bad teeth, skin and fingernails. If we can convince young people not to start, 5. they might then urge their parents and other people to give up smoking, too.
在1~10 的空格处填入适当的内容或括号内单词的正确形式(不超过三个单词)。
Our family bought1.new computer last week. It is2.(real) cool! But we didn’t know what we should do 3.the old one. Then I saw an advertisement for Tech-help. Tech-help donates computers to people 4.need them.
So far, Tech-help has 5.(donate) more than 2000computers to different families across the country. Last year they gave computers to poor families. It is very easy to donate computers to Tech-help. Yesterday, my father and 6.(me) took the old computer to a local shop. Two hours later, Tech-help7.(collect) it from the shop. They will clean the computer and make it better.
Right now, Tech-Help is 8.(give) computers to families in Xinjiang. There 9.(be) about 50 families on the waiting list. I’m 10.(excite) we could do something to help others!
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。It is not so easy to disagree with your parents．Here are a few quick tips on how to show your opinion in the right way．1.Don’t let angry words fly out of your mouth if you don’t really want to say them，or you will have a lot of work to do later．
2.How would you feel if you were your mother or father? Why do they do that? Is it really bad?Try to stay calm．If you find yourself getting too angry, ask for some time to be alone．3.Learn to listen．Maybe your parents aren’t as persuasive(具有说服力的)as you think.4.Pay attention to needs rather than problems.5.Tell your parents that you want to discuss the problem with them rather than work against them．
A.Think about the problem from your parents’ point of view．
B.Never listen to your parents
C.Think before you speak．
D.It is quite common to disagree with one’s parents．
E.Hear them out and then decide how to deal with the problem．
F.If you can, try to discuss the problem with your parents at another time．
G.Be clear about what you need，rather than focus on why you disagree．
