Scientists claim to have developed a revolutionary new giant 3D concrete printer that can build a 2,500-square-foot house in just 24 hours.The 3D printer, developed by Professor Behrokh Khoshnevis fro 题目和参考答案——青夏教育精英家教网—

题目内容

Scientists claim to have developed a revolutionary new giant 3D concrete printer that can build a 2,500-square-foot house in just 24 hours.

The 3D printer, developed by Professor Behrokh Khoshnevis from the University of Southern California, could be used to build a whole house, layer by layer, in a single day.

"It is basically scaling up 3D printing to the scale of building," said Khoshnevis.

The giant robot replaces construction workers with a nozzle (喷嘴), which can quickly build a home based on a computer pattern, MSN News reported.

Contour Crafting, as it is named, is a layered fabrication (构造) technology. Using this process, a single house or a colony of houses, each with possibly a different design, may be constructed in a single run, embedded (嵌入) in each house all the wires and pipes for electrical, plumbing and air-conditioning.

The potential applications of this technology are far-reaching including in emergency, low-income, and commercial housing.

"Our research also addresses the application of Contour Crafting in building habitats on other planets. Contour Crafting will most probably be one of the very few feasible approaches for building structures on other planets, such as the Moon and Mars, which are being targeted for human habitation before the end of the new century," researchers said on the project website.

The technology may potentially reduce energy use and emissions. And the main advantages of the Contour Crafting process over existing technologies are the superior surface finish that is realized and the greatly increased speed of construction.

1.Professor Khoshnevis has recently developed a 3D printer that can ________.

A. build a 2500-square-foot house in a single day

B. construct a skyscraper, layer by layer

C. design a group of houses automatically

D. assist construction workers in their work

2.The new 3D printer uses the following to build a house EXCEPT ________.

A. a nozzle B. a computer pattern C. a robot D. an air-conditioner

3.According to the text, the potential applications of Contour Crafting include building _______.

A. emergency vehicles B. low-income housing

C. commercial centers D. space stations on other planets

4.What advantages of this new technology is mentioned in the text?

A. It creates more jobs. B. It is less time-consuming.

C. It saves the building cost. D. It emits no carbon dioxide.

练习册系列答案

4．The dog bit him and made his hand bleed．

In a bread store I heard a lady say her foot was hurting and that she was going to call a cab. When walking back I saw her outside the store, probably_______for a cab.

I asked her where she was going. She told me a place which was actually on the _______to the gift store I’d be_______to. _______, I asked her to cancel the cab and I’d give her a ride. To my_______, she said okay without_______. I wonder if I’d have been so_______if a stranger made me the same offer!

Where she was going was_______on the way to where I was going. It was such a beautiful interaction. But there was more!

When I had_______what I went for and was waiting at the checkout, the woman behind me said she had a coupon(优惠券) for 50%________any item in the store. She gave it to me because she had a(an)________one! I thanked and________a smile card to her.

They say “What goes around comes around”, but sometimes it is hard to see how that ________, as there is often a “manifestation delay(推迟显现)”. Each action________a ripple(涟漪) that finally________back to us, but sometimes it is much________so we forget their connection.

Today the causes and________have appeared in a linkable way. By________I’m also opening myself to receiving gifts, now or in the future. I can learn so much from others about how________they are to receive in a way that I might not have been so if________the same gift.

1.A. applying B. caring C. paying D. waiting

2.A. way B. right C. left D. west

3.A. leading B. walking C. pulling D. driving

4.A. However B. Therefore C. Instead D. Besides

5.A. joy B. sadness C. amazement D. disappointment

6.A. thinking B. thanking C. replying D. paying

7.A. frightened B. inviting C. shocked D. trusting

8.A. very B. right C. simply D. finally

9.A. put up B. gave up C. picked up D. went up

10.A. from B. off C. under D. down

11.A. magic B. devoted C. important D. extra

12.A. sent B. gave C. returned D. awarded

13.A. shares B. recognizes C. works D. loses

14.A. decorates B. calculates C. affects D. creates

15.A. comes B. holds C. puts D. keeps

16.A. easier B. later C. farther D. swifter

17.A. solutions B. events C. reasons D. effects

18.A. appreciating B. persuading C. giving D. insisting

19.A. open B. tired C. ashamed D. confident

20.A. brought B. rewarded C. offered D. passed

One year ago, I had a special English lesson hold at the railway station. It was quite different from the regular English classes we were familiar to, for we had no textbooks, no blackboard or no fixed seats.

Gathering at the entrance of the station, we told to collect as many English words and sentences as possible here. Curious and excited, we walked around the station and looked everywhere, search for any information in English. Whenever an English word comes into sight, the class would burst into the cheers as if we had discovered a new world. With the Chinese translation and vividly pictures, we could figure out its meaning with ease.

Now, this unforgettable lesson still encourages me to be an active learner where I go.

3．How to stay in a good moodIt's typical to feel your mood starting to become bad．If you want to be able to stay in a good mood，then you have to form these habits that will keep you feeling happy．
1．Don't take love for granted．
If you're lucky enough to have a special someone，then you should make your time together meaningful．（36）FMake time to spend time with your special someone．Being around your loved one has been proven to make people happier．
2．Get regular exercise．
Regular exercise is one of the most important habits that you need to form．（37）DYou can go running three times a week and walk the other four．Just make sure to be as active as you can every day．
3．Spend time with your friends．
（38）GOf course，don't always hang out with friends when you have a free moment．Make sure you do make time to see friends at least once or twice a week，if you can．
4．Get enough sleep．
（39）AOne of the easiest ways to stay in a good mood is to be well-rested．Waking up feeling full of energy will make you feel much more ready to face the day and much more excited about everything ahead of you．
5．（40）BIf you want to stay in a good mood，then you have to make sure that you eat three healthy and diverse meals every day．Start off with a healthy breakfast，and don't skip this meal no matter what things happen．Have light snacks throughout the day，like yogurt or fruit，to keep you energetic．

A．Make sure that you sleep for 7-8hours a day．
B．Have a healthy eating schedule．
C．Do begin with a healthy breakfast in the morning．
D．However，you don't have to do the same boring old thing every day．
E．Once you start exercising，do the same sports at the regular time every day．
F．Don't stop doing the things you love with the person you love．
G．Hanging out with friends will keep you feeling alive．

10．How to get motivation for study？
Do you need motivation for doing your homework？（16）E
     Get Perspective
     When you consider homework a drag，it might help to think about the reason why you do it．The work you do now really is important，even though it's probably hard to see sometimes．（17）DYou see，you may not believe that you'll need your algebra（代数）skills later in life，but algebra sets the stage for understanding principles of science，economics，and business．
（18）A
Most students have a special talent in one particular area，so they enjoy doing homework in that topic．Just pick one area you love and become the self-appointed expert in your school．Get a serious attitude!Think of yourself as the best at that topic，and then make it a reality．Once you do so，you will gain"confidence"in yourself and enjoy doing homework．
    Get Competitive!
    If you think you're at a disadvantage to other students，you can turn things around by getting a competitive attitude．（19）FTry to surprise everyone，including the teacher，by doing outstanding work．
    Get Your Eye on the Prize!
    If you get bored thinking about homework，you may need to focus on setting and reaching goals．For instance，if you are having trouble getting started on a big science project，then divide your project into steps and reward yourself each time you finish a step successfully．（20）G

A．Get an Attitude
B．Get Confidence
C．Algebra is not easy for everyone to learn，but it is very useful．
D．In fact，it is real work that will form the foundation for your future．
E．If you feel like homework is pointless，you may find inspiration in the following tips．
F．Think of every project as a challenge and start to do your assignment better than anybody else．
G．Just focus your eye on the prize and try to make it happen，which will help achieve your dream．

7．短文改错
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10处，多者（从第11处起）不计分．
I have learnt so much things from my parents．They show me when to be a tolerant（宽容）person．When children make mistakes，most parents who are hard with their kids will be very angry．They say some hurting words，making their children to feel sad．Besides，my parents are different from them．
Every time I make mistakes，my parents prefer to educate me in a gently way．I'm so grateful to my parents all that they have done．Being tolerant of other people's mistakes are the best way to solve problems．Your kind act will be greatly appreciating．Be tolerant of other so that they will be tolerant in turn．

8．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．每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：把多余的词用斜线（\）划掉．
修改：在错的词下划一横线，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10处，多者（从第11处起）不计分．
Today we visit a farm．Early in the morning we met at the school gate and went to there together．The farm worker gave us a warmly welcome．Then the head of the farm showed them around．What glad we were to see the crops or vegetables growing well．At noon we had picnic lunch in the sunshine．After a short rest，we had great fun singing，dancing，and told jokes or stories．Two of us even played a game of chess．Time passed quickly．Until we knew it，we had to say goodbye to the workers．

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