Have you ever dreamed of visiting a planet in the Milky Way (银河系)? While the trip sounds exciting, it would take years and years to reach your destination. So in the future, bedtime for astronauts may be more than a few hours of regular shut eyes. They would have to sleep for years.
European researchers are now conducting hibernation experiments. The study may help them understand whether humans could ever sleep through the years it would take for a spaceflight to distant planets. "If there was an effective technology, it could make deep space travel a reality," said Mark Ayre of the European Space Agency last month.
What seems like a science fiction is not completely unlikely. Researchers have been able to use chemicals to put living cells into a sleeplike state where they don’t age. They have now moved on to the small, non hibernating mammals like rats.
A major challenge is the fact that cells can be very simple systems, whereas body organs are far more complex. "It’s like moving from a simple Apple computer to a supercomputer," said Marco Biggiogera, a hibernation researcher at Italy’s University of Pavia. Just like bears and frogs, the hibernation of human beings would cause a person’s metabolism (新陈代谢) to lower so they would need less energy.
Medical research, however, is just half of a spaceflight hibernation system. There is a challenge of designing a suitable protective shelter. Such a shelter would provide the proper environment for hibernation, such as the proper temperature. It would also have to monitor life functions and serve the physiological needs of the hibernator.
According to Ayre, the six person Human Outer Planets Exploration Mission (使命) to Jupiter’s moon (木星的卫星) Callisto, could be an opportunity to use human hibernation. The mission aims to send six persons on a five year flight to Callisto, where they will spend 30 days, in 2045.
1.According to the article, the hibernation research _______.
A. is just an idea
B. is always a science fiction
C. has already finished successfully
D. has made some progress
2.In a hibernating state, a person needs ________.
A. less sleep B. more food
C. less energy D. more movement
3.The first try of the hibernation technology the six person Human Outer Planets Exploration Mission to Jupiter’s moon Callisto.
A. will be B. has been planned for
C. is certain to be D. may be
4.What is the best title of the article?
A. Hibernation study for space travel
B. Welcome to our space travel
C. To hibernate, to live longer
D. Welcome to the Milky Way
假如你叫王凯,是学校国际班学生,上周五晚从楼梯摔下造成左脚受伤。虽手术及时,但仍须在家中休养一月。请你按以下要点给你的老师Mr.Smith写一封信:
1.请假并说明原因,表达歉意;
2.询问病假期间的学习方式;
3.表达个人愿望。
注意:
1.词数100左右;
2.可以适当增加细节,以使行文连贯;
3.开头和结尾已为你写好。
Dear Mr. Smith.
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
Yours sincerely,
Wang Kai
假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文 中共有10处语言错误,每句中最多有两处。错误仅涉及一个单词的增加、删除或修改。 增加:在缺词处加一个漏字符号(^),并在其下面写出该加的词。删除:把多余的词用(\)划掉。修改:在错的词下面画一横线,并在该词下面写出修改后的词。
注意:1.每处错误及其修改均仅限一词:
2.只允许修改l0处,多者(从第11处起)不计分。
I used to feel I was the sun in my family.But when my cousin was born,everyone pays more attention to her.So I disliked her and couldn’t get along well with her. With time went on,I realized how ridiculous I have been at that time.I tried to find a proper time to apologize.When my cousin’s family came to my home a few day ago,I took my cousin to play outside.In the way to the playground.I bought much snacks for her.Then we began chat.When we talked about their childhood,suddenly,I said“sorry”gently.She was silently,so I thought that she hadn’t heard me clearly.But after while she said:“Don’t say that.In my memory,you are always friendly.”
A man looking at his smartphone while walking across a railway crossing in Nanjing 1. (have)a close knock on Oct 22.He was so2. (absorb) in his smartphone that he didn’t see a train approaching until it brushed past him, 3. (throw)him to the ground.This should serve 4. a warning that people should be aware of their surroundings.especially 5. crossing roads.
6. (1ucky),the man survived a brush with death,but the incident forced the driver 7. (stop)the train.An l8-minute delay followed the incident,8. led to a break in the running of other trains on the route.
Smartphone 9. (addict)has spread like an infectious disease.It’s evident that it will do great harm to society.What’s even 10. (bad),some addicts become impatient with relatives and friends.
Some people blame the smartphone for the tragedy,yet in tact people’s weakening self-control and self-discipline are to blame.
Every Wednesday,I go to Cantata Adult Life Services,a local retirement community,with my classmates to do community service.
Our visits last about an hour, playing board games and cards with the residents we’re there.
You can watch all the movies and TV shows you want about“life back then”,but nothing with talking to the people who were actually there.Just hearing their stories has me in a way never thought possible.
Whether it was talking to 98-year-old“Hurricane Hilda”about her glory days a roller skater or chatting with Lou about the times she danced with a famous actor, I was completely impressed by every single the residents wanted to share with me.
Even the residents who don't have memories make the experience fulfilling.I remember visiting Mrs.Robinson.She couldn’t much about her past,but she told me she'd forget how kind I was just to listen to her“rambling(漫淡)”. It made the realize that it's the things that make life worth living.That’s something I won't anytime.
If there’s one thing I’ve realized in my three years of visiting Cantata,it's that -just being there-means more than anything to many of the residents.And despite how our lives are, there’s always time to make them happy.
For me,it feels great to be a of happiness,a smile on a bad day or a(n) for old memories.And at the end of the day,that’s all that .
It’s easy to feel like you don’t have much in common with the -especially,when you’re a(n) .But that's not true at a11.
I hate to make much comment here,but age really is just a(n) .As young adults,it's important for us to realize this sooner later.We can learn a lot from the elderly, and they can often from teenagers,too.
1.A.until B.unless C.before D.while
2.A.Compares B.competes C.combines D.connects
3.A.touched B.reached C.captured D.disgusted
4.A.1ike B.as C.about D.towards
5.A.imagination B.truth C.picture D.memory
6.A.suffering B.depressing C.amazing D.1onging
7.A.concern B.describe C.recall D.mention
8.A.ever B.always C.even D.never
9.A.important B.1ittle C.major D.sweet
10.A.care B.skip C.believe D.forget
11.A.presence B.appearance C.companion D.protection
12.A.messy B.happy C.easy D.busy
13.A.trend B.chance C.source D.cause
14.A.mind B.ear C.tongue D.heart
15.A.matters B.favors C.differs D.exists
16.A.friendly B.1ively C.1onely D.elderly
17.A.adult B.teenager C.adolescent D.waiter
18.A.amount B.difference C.advantage D.number
19.A.or else B.rather than C.other than D.except for
20.A.hear B.differ C.judge D.benefit
Everyone can benefit a lot from reading books.The following is about the various benefits of reading books.
1. Whenever you read something,you learn information that you otherwise wouldn’t have known.It can be a fact about history or a theory you didn’t know existed.If you want to learn new words,reading books is a great way to enlarge your vocabulary.
2. Similar to solving puzzles,reading books allows your mind to practice its processing skills.Going without books for too long will turn your mind into a whirl(混乱).
One of the primary benefits of reading books is its ability to develop your critical thinking skills. 3. Wherever you are faced with a similar problem in real life,your mind is able to put its mystery-solving skills to a test.
One of the real benefits of reading books is that the information in it can be accessed over and over again.For example,reading a cookbook allows you the luxury of reviewing the procedures whenever you need to.4. Don’t even think about writing the information down because you may lose the paper you wrote down on sooner or later.
These are just some of the wonderful benefits of reading books. 5. If you can’t even go outside,you can download free e-books on line and read them on your computer.That way,you can set how advantageous reading can be for yourself.
A.Reading books keeps your mind active.
B.You can improve your memory by reading.
C.Reading books provides you with new knowledge.
D.Following a recipe from a cooking show will be difficult.
E.Reading mystery novels,for example,sharpens your mind.
F.Reading keeps your mind in good condition.
G.Why don’t you drop by the bookstore or library and pick a book up?