修改时间：2021-05-20 浏览次数：94 类型：单元试卷
If you grew up watching the kid's television channel Nickelodeon, you will probably understand that there is nothing greater than enjoying its special bright green slime (水晶泥). The week of May 11, astronauts aboard the International Space Station (ISS) joined the slime.
Nickelodeon sent two kilos of its green slime into space in the summer of 2019. The Slime in Space project's idea was to create an educational trip for teachers to use in class. The green slime was also used to guide astronauts through a series of experiments that were designed to learn more about how slime acts in microgravity.
Researchers from Portland State University (PSU) were excited to design the experiments for the project. Mark Weislogel and his partner designed eight shows for NASA astronauts and European Space Agency astronauts aboard to perform.
If you're wondering what we could hope to learn from sending slime into space, the answer lies in its very name. Slime is slimy. This is because it is a liquid that is thicker than liquids like water. This makes slime act in unexpected ways in the microgravity of the ISS. Improving our understanding of how thicker liquids act in space may help us improve the design of systems that something were designed with Earth's gravity in mind.
"Interestingly, we consider liquid on Earth as that takes the shape of its container," Koch tells CNN." Water just turns into a ball in microgravity, so we've had to have a new understanding of different kinds of matter in space. This experiment shows how microgravity can help us understand things on Earth, especially the things we take for granted."
Making beer on the moon might seem like a pipe dream to many, but for a group of students from the University of California at San Diego, there is a chance to take their research beyond Earth's surface.
The Lab2Moon competition, held by TeamIndus, is offering students the chance to secure a spot on the TeamIndus rocket this year.
Taking craft beer to the next level, the students want to test whether it's possible for yeast (酵母) to work and create beer on the moon. However, they believe the experiment is not just a creative concept for astronauts, it's also important for the development of drugs and yeast-containing food, like bread.
"The idea started out with a few laughs among a group of friends," said Neeki Ashari, a fifth-year bioengineering student at UC San Diego." We all appreciate the craft of beer. When we heard that there was an opportunity to design an experiment that would appear on India's moonlander, we thought we could combine our hobby with the competition by focusing on the practicality (可行性) of yeast in outer space."
The preparation work for the beer — up to the stage of adding yeast — will all be done on Earth, and rather than separating the fermentation (发酵) and carbonation stages of making beer, the team plans to combine them.
This removes the need to release CO2 accumulated in the process, which may result in cleanliness and safety issues out in space.
If selected, Team Original Gravity will be the first to make beer in outer space, and the fermentation will take place in a vessel no bigger than a soda can.
All teams competing for the place will showcase their ideas in Bangalore, India.
Sadly, you won't be enjoying moon beer in your local craft beer bar anytime soon, as no samples will be brought back. However, this small experiment could provide important data on just how practical it is for us to make and create our own resources on other planets and moons by learning how consumables behave in different environments.
As we all know, science is blooming more strongly than ever. Recently, NASA astronaut Scott Kelly showed a photo of the orange zinnia (百日菊)on Twitter. It is the first flower to ever bloom in space and has attracted much attention all over the world. This may be the most exciting news in the field of science. The zinnia in the picture is so beautiful and looks similar to that on earth. Kelly cared for it for more than a month.
The Veggie plant growth facility chose the zinnia flower species because it has a longer growth cycle. As a result, it can help scientists understand how plants flower and develop in microgravity(微重力).
"While the plants haven't grown perfectly," said Gioia Massa, NASA science team leader for Veggie," I think we have gained a lot from this, and we are learning both more about plants and fluids and also how better to operate between ground and the station."
This was not the first time that scientists had attempted to grow zinnia in space. Other astronauts aboard the International Space Station (ISS) began growing the colorful flowers last year. However, due to high humidity (湿度)and low air movement in space, the zinnia leaked (渗透)water out of the tips of the leaves. What was worse, the spread of harmful bacteria was destroying its growth badly. Kelly then took over the operation and began taking care of the zinnia as he would in his own garden.
The ISS also successfully grew red romaine lettuce in July 2015. Kelly even took a bite of the harvested plants and posted the photo on his Twitter. NASA's new experiment using the Veggie plant growth system will be started later. Astronauts will attempt to grow Chinese cabbages. The space agency will then attempt to grow dwarf tomatoes in 2018.
Long before we had airplanes, people had been experimenting with different flying machines. We still use some of those flying machines today.
Hot-air balloons and gliders(滑翔机) use air currents(气流) for movement. Hot-air balloon pilots control their aircraft by going up or down into air currents that move the balloon. The pilot controls the balloon's movement by heating the air inside the balloon, or by allowing it to cool naturally. Small planes pull gliders along a runway to help them take off. But once in the air, gliders use the currents, not an engine, to move. Their long wings and strong body give riders a safe, smooth flight.
Helicopters(直升机) first appeared during World War Ⅱ. A helicopter doesn't have wings, but, like an airplane, it has an engine that makes its blades(螺旋桨) move at high speeds. This allows the helicopter to rise into the sky. But helicopters can stay in one place in the sky for a long time. Today helicopters are mostly used by medical teams and the army. But you can also take a helicopter ride for fun.
So before your next aircraft ride, remember that airplanes aren't the only way to fly.
A. An airplane has to keep moving.
B. Gliders also use air currents to rise and glide.
C. Learning to fly a helicopter isn't a simple task.
D. Hot-air balloons and gliders are most often used for fun.
E. Some depend on air for movement, while others use engines.
F. Many tourist attractions offer helicopter rides for sightseeing.
G. Every flying machine has its own special characteristics, some good, some not so good.
The other day, my husband and I took the kids for dinner at a branch of Pizza Express. There was a very friendly lady 1 alone at the next table. When the time came for her to pay the 2 , her bank card was declined. The waitress told her, in a very kind way, that there was a 3 but that she would call her manager for help. Seeing this, my husband 4 got up and told the waiting staff that we would pay for the lady's meal. 5 , when the manager arrived, he explained to the lady that although she couldn't use her 6, there was no need to 7 . Pizza Express authorizes (授权) the restaurant to 8 two free meals per month and on this 9 , they would like to provide her with a free meal.
She was extremely grateful and apologetic that she had been 10 to pay. We were relieved that the lady had been 11 with dignity instead of being placed in a 12 position.
Then, the manager 13 our table. He said that, 14 we had shown such generosity, he would like to donate the second free meal that the restaurant was able to 15 to us! We were absolutely 16 ! I had never heard of any chain restaurant behaving in such a(n) 17 way. We were quite 18 with gratitude. I made sure that the lady was able to get home OK, and then we 19 the staff and left ourselves. I was really impressed by how the restaurant had treated this 20 case.
Astronauts on the International Space Station (ISS) have fixed a hole in the shell of its outer wall. The ISS is a large satellite in space scientists live to do scientific experiments. The first part of it (put) into space in 1998. Last week, NASA warned astronauts on the ISS that air was (slow) leaking out of the station. Astronaut Alexander Gerst and five other astronauts spent a lot of time (look) for the leak. Mr Gerst eventually found it and he put his finger over the hole. Luckily, the hole was only two millimeters wide, so it was not serious, but it did need (fix).
The hole was in a Russian Soyuz MS-09 spacecraft. NASA said it could have been caused a small piece of space junk. The ISS travels at speed of around 28, 000 kph. Even a tiny object (hit) it can cause a lot of damage. Flight (control) in the USA and Russia worked together with the crew to repair the hole.
A NASA official said the crew on the ISS are (health) and safe after the repair.
During lunchtime, Emma suggested going to the zoo to feed the animals and her mom agreed.
"We'll stop by the bakery and pick some bread up. Now hurry and eat and then we'll go. It's going to be a lovely day. Grandma is coming with us. She'll be here any minute, "mom said.
Emma ate her lunch and then ran into her room to get her shoes. The problem was that she could only find one of them. She looked under her bed, but all she could see were dirty towels and pants. She moved some of her toys out of the way, but still couldn't find her shoe. After she'd checked everywhere in her room, she ran into the kitchen. "Mom, I can't find my shoe. Will you wait while I look for it? "she asked.
Her mom thought about how many times she'd told Emma to clean her room up. She whispered something to Emma's grandma and then said to Emma, "You will have to stay home. Your dad and I will take Ryan to the zoo. Grandma will stay here with you. "
"No! Please wait for me. I want to go to the zoo, "Emma cried. "I'm sorry, Emma. I've told you a dozen times to clean your room and you ignored me. You can't find your shoe now. It's your own fault for not doing as I asked. You will stay home. "
Emma ran into her bedroom, crying. Her mom came to the door and said, "Emma, clean that room of yours before I get home. I've told grandma not to give you any sweets until you finish the work." She went out to the car with Ryan and Emma's dad and then they drove away.
注意：
1）所续写短文的词数应为150左右；
2）至少使用5个短文中标有下划线的关键词语；
3）续写部分分为两段；每段的开头语已为你写好；
4）续写完成后，请用下划线标出你所使用的关键词语。
Paragraph 1:
Emma sat on her bed and cried for a long time.
Paragraph 2:
Emma and her grandma were sitting at the table, eating when her mom, dad, and Ryan came home.
Over the past few years, there has been a big increase in the number of people sharing information online. In this article we will learn about some positive factors for people to share information online.
We often share information with our friends in the office or at home to educate, entertain or pleasantly surprise them. In this way we can connect with others. This is also true while sharing information online. If you look at the Facebook wall posts of your friends, you will realize that most of their updates are usually famous quotes, entertaining videos, inspirational images, funny jokes, etc. 94% of those who responded to a survey by The New York Times said they put a lot of thoughts into how the content they are sharing will be beneficial to others.
A lot of people share information online to represent their true self to the outside world. Some people, especially those who are shy and not comfortable talking about their areas of interest in the presence of others, find it extremely convenient to share that information online with like-minded individuals.
78% of the respondents in the study of The New York Times said they shared information online because it helps them develop better relationships. Today, a lot of people do not have the time to meet each other in person and the Internet has become a great substitute. A lot of people now "meet" each other online, rather than in conventional places like restaurants and pubs.
Lastly, when we share our thoughts online, we are actively engaging with the vast community of people who are a part of the World Wide Web. Sharing information will make a difference to the viewpoints of others, or add to their understanding about the world.
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