Fancy your own satellite? Arizona State University is working towards making this a reality with its SunCube FemtoSat project. Smaller than a standard CubeSat, the low-cast student-designed spacecraft is aimed at providing greater access to space for scientists and hobbyists alike.
Assistant professor Jekan Thanga and a team of students have been developing the SunCube FemtoSat for the past two years. The small 3×3×3cm cube weighs in at just 35g and a longer (3×3×9cm, 100g) model has also been designed, which includes storage space.
Each SunCube FemtoSat has its own communication, data collection and propulsion (推进) systems and is powered by solar panels. It is made of off-the-shelf parts that are available in shops, and the energy-efficient solar panels are cut from scrap (碎片), which makes it save energy, sold at a discount by manufacturers. “With a spacecraft of this size, any university can do it,” says Thanga. “That’s part of our major goal—space discovery for everybody.”
The team says that while launching your own satellite would usually cost between US $ 60,000-70,000 per kilo, it would only cost $ 1,000 to send a SunCube FemtoSat to the International Space Station, and $ 3,000 to send it into low earth orbit. Leaving the earth’s gravity would cost an estimated $ 27,000.
The FemtoSat would be packed with a “jack in the box” style system that matches standard CubeSat sizes (around 10 cubic cm), simplifying the process of getting the tiny satellite into orbit. NASA has sent 30 CubeSats into space over the last years, with another 50 awaiting launch.
Thanga and his staff view the FemtoSat as a starting point for scientists and students, and even hope the device could be bought on the website like Amazon one day. Thanga imagines developing four main applications for the device, including hands-on testing experiences for students, and artificial gravity experiments. In addition, groups of SunCube FemtoSats could eventually be able to do the job of larger spacecraft at a vastly discounted cost.
1.What is the major goal of the SunCube FemtoSat project?
A.To act on teaching in outer space. B.To provide access to spacecraft design.
C.To help carry out a classroom experiment. D.To help average individuals explore space.
2.What is special about SunCube FemtoSats?
A.They are of the same size. B.They are energy-efficient.
C.They are mainly designed for lab use. D.They are mainly used to collect information.
3.What does Thanga expect of SunCube FemtoSats?
A.They’ll be available online. B.They’ll be provided for free.
C.They’ll match the size of CubeSats. D.They’ll be sent into space with CubeSats.
4.What can be the best title for the text?
A.FemtoSats Will Rule Space B.Your Own Satellite Is Coming
C.Going into Space Has Been Afforable D.You can Design Your Own Spacecraft
Pycnandra acuminate (喜树) is a rare tree native to New Caledonia that has the rare ability to collect heavy metals like nickel (镍) from the ground. The liquid circulated in its body is blue-green and reportedly contains up to 25% nickel.
In general, trees and heavy metals like nickel don’t really go well together. But Pycnandra acuminata make them live together. And that’s what makes Pycnandra acuminata so special. It sucks out normally poisonous levels of heavy metals from the soil and store them in its trunk, leaves and seeds.
The evolution of Pycnandra acuminate is believed to have occurred over millions of years, but scientists have yet to identify a universal principle of nickel intake and storage. The reason why such trees have formed the way of absorbing metals is also up for debate.
The most popular theory states that the concentration of nickel protects such trees from leaf-chewing insects. And studies have shown that nickel accumulated by these trees indeed harms many insects though some have developed a high tolerance to it. Another theory says nickel has effects of resisting bacteria, which protects the trees from various diseases. However, these theories are all just theories.
One thing that has been proven is the ability of Pycnandra acurninata to clean the soil with poisonous materials caused by human activity. There’s also clear potential for collecting heavy materials like nickel in these kinds of soils that will bring a few profits by conventional ways of mining. People can collect minerals contained in such soils from the blue-green trees。
Unfortunately, Pycnandra acuminata is is recently in a bad situation. Human activity in forests of New Caledonia has made Pycnandra acuminata in danger. Consequently, probably fewer than several hundred trees of this kind have remained as a result of the reduction of our forests.
1.What do we know about Pycnandra acuminata?
A.It has a blue-green color due to metals collected.
B.It is able to collect some heavy metals from the ground.
C.It sucks out a great deal of poisonous underground water.
D.It tends to grow in the soil with plenty of poisonous liquid.
2.What do the theories in paragraph 4 say about Pycnandra acuminata?
A.It indeed protects many insects.
B.It stores most nickel in its roots.
C.It protects itself through the concentration of nickel.
D.It makes its surrounding plants suffer from diseases.
3.What does the author mainly want to express in the last paragraph?
A.Pycnandra acuminata is in danger.
B.Forests are to blame for the reduction of trees.
C.Forests are decreasing as a result of human activity.
D.Pycnandra acuminata is under the protection of people.
4.In which section of a magazine is this next most likely to appear?
A.Bacteria and disease. B.Health and life.
C.Fashion and entertainment. D.Man and nature.
Remember Vitainwater’s “free of rolling screen for a year” challenge that dared people to be free from smart phones for a whole year will win $ 100,000? Well, Elana Mugdan, a New York woman, has been into it for eight months, and just four months away from claiming grand prize.
Vitaminwater made news headlines last December when it announced its unique challenge. Thousands of people applied to be chosen as the perfect candidate to spend a year without touching their smart phones, but in the end, the only person who got to try and survive for an entire year without a handheld smart phone was Elana Mugdan, a 29-year-old fiction writer from Queens, New York. Eight months into the challenge, she claims it has been a free and eye-opening experience that shows her just how dependent she becomes on her smart phone. Even though there are times when she misses her handheld smart phone, she plans to go on living without it even after the challenge ends, because she really doesn’t want to go back to days when she abused it, wasted time, stayed up all hours of the night on it, and was obsessed with social media.
But not having access to her smart phone really made certain situations a lot harder than she could have imagined them before. “Many people did me a favor. However, once, I almost got stranded (滞留) in the SeaTac airport because the phone number I’d written down was wrong, and I had no way of referring to the right one, no way of calling a cab, and no one in the state who could help me,” the young writer said.
Another time, her car’s “check engine” light turned on while she was driving in an unfamiliar area at night. She couldn’t use her phone’s GPS location feature, r even check what the light meant on Google or find a nearby car repair shop. Still, she learned to overcome these situations. And now she claims the last eight months of phone-free life have been one of the best adventures of her life and that she’ll keep it for another four months.
1.What’s the challenge “free of rolling screen for a year”?
A.People free from smart phones can live a richer life.
B.People living a telephone-free life can be awarded every year.
C.People living without computers for a year will win grand prize.
D.People spending a year free from smart phones will get a reward.
2.Which phrase can replace the underlined part “obsessed with” in paragraph 2?
A.satisfied with B.accustomed to
C.addicted to D.popular with
3.What does Elana Mugdan mainly want to express in paragraph 3?
A.It’s fantastic to have someone to help her all the way.
B.It’s unimaginable to lose her phone number on the way.
C.It’s unnecessary to refer to information with a smart phone.
D.It’s difficult to get out of the trouble without a smart phone.
4.What can we learn about Elana Mudgan?
A.She couldn’t live without a smart phone.
B.She finds no one can help her in the adventure.
C.She has not won the grand $ 100,000 prize yet.
D.She used to use her smart phone to write fiction.
First Aid Level 1
The course is suitable for anyone who wants to learn CPR, short for cardiopulmonary resuscitation (心肺复苏法). It also covers management of bleeding and shock. This course includes assessment and leads to a New Zealand Qualifications Authority (NZQA) unit standard. The most attractive point is that a well-known doctor will teach this course.
Price: $ 100
Duration: 1 day
First Aid Level 2
It includes all of the course content from First Aid Level 1, plus an additional half day. Suitable for first aiders, health and safety staff and anyone who needs first-aid knowledge for their professional qualification. A very experienced doctor will teach this course.
Price: $ 150
Duration: 1.5 days
Resuscitation Level 3
This training course is for those who require Level 3 resuscitation skills, especially people who have a duty to respond and are probably concerned with the start of resusciation.
Price: $ 160
Duration: 4 hours
Resuscitation Level 4
This is an important health professional resuscitation training course. It can be used as a Level 4 refresher course. This course is the most suitable for nurses, nurse managers, District Health Board (DHB) resuscitation officers.
Price: $ 200
Duration: 4 hours
Take a look at the series of first aid courses, so that you can choose the medical learning experience that best matches your needs.
1.How is First Aid Level 1 different from the other courses?
A.It’s the most expensive.
B.It’ll last the longest time.
C.It’ll be taught by a famous doctor.
D.It’s meant for health and safety officers.
2.How much should an applicant pay per hour for Resuscitation Level 3?
A.$ 40. B.$ 50.
C.$ 100. D.$ 160.
3.What is the main purpose of the text?
A.To show doctors’ responsibilities.
B.To advertise the first aid courses.
C.To advise medical professionals to assess their living standards.
D.To inform medical staff of the medical levels of the four hospitals.
假如你是李华，你的英国朋友Michael在学校举办的“中国诗词大会”比赛中获得了外国选手组一等奖。请根据以下提示写一封英文电子邮件向他表示祝贺。
1. 祝贺他获奖；
2. 肯定他付出的努力；
3. 询问何时方便，一起交流一下中国古诗词学习心得。
注意：1. 词数100左右；2. 可以适当增加细节，以使行文连贯。
中国诗词大会 Chinese Poetry Contest
Dear Michael,
______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours,
Li Hua
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。
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。
Welcome to the Great Wall. Measured more than 6,000 kilometers in length, the Great Wall is known as the long wall in the world. It had a long history of more than 2,000 years. That is amazing about the Great Wall is that it is main made of stones and bricks, and that all the construction was done by hand. As it was used to protecting the country from foreign invaders, every a few hundred meters along the Great Wall, there was a watchtower. Now, as a symbol of China, the Great Wall has become one of the most famous tourist attraction in the world. There is no wonder that the Great Wall attracts thousands foreign tourists every year.
