Following news of the potential for life on the recently-discovered TRAPPIST-1 system, there may be another competitor ready to take its place.
With the help of the Cassini spacecraft, NASA (National Aeronautics and Space Administration) scientists have picked up the first evidence that chemical reactions are taking place deep below the surface of Enceladus, Saturn’s (土星的) sixth-largest moon. This means that there could be life in Enceladus’ warm underground seas.
An early study found that liquid oceans exist miles below Enceladus’ surface. But to reveal what is happening down there, scientists must rely on the plumes (股) of water that spray (喷射) through cracks in Enceladus’ icy surface. In October 2015, NASA sent Cassini into a deep dive into one of the plumes.
Cassini’s findings, published on April 13 in the journal Science, showed that hydrogen (氢) not only exists on Enceladus, but is also responsible for a chemical reaction between hot rocks and water in the ocean beneath its surface.
This same process on Earth provides energy for entire ecosystems around volcanic vents (火山口). There, tiny creatures are able to survive without sunlight, using hydrogen and carbon dioxide as fuel in a process known as “methanogenesis (甲烷生成)”.
The discovery of this chemical energy source on Enceladus means it could be a very good candidate to host life.
“Confirmation (确认) that the chemical energy for life exists within the ocean of a small moon of Saturn is an important milestone (里程碑) in our search for habitable (可居住的) worlds beyond Earth,” Linda Spilker, Cassini project scientist at NASA, told the Daily Mail.
Alien life was once only thought possible on habitable planets within the “Goldilocks zone” – far enough from our sun not to be a fireball, but not so far as to be freezing.
Research on Enceladus is still in its early stages, but the recent findings have important meanings for future exploration.
“At present, we know of only one genesis (诞生) of life, the one that led to us,” David Rothery, professor of planetary geosciences (行星与地球科学) from the Open University in the UK, told The Telegraph.
“If we knew that life had started independently in two places in our solar system, then we could be pretty confident that life also got started on some of the tens of billions of planets and moons around other stars in our galaxy,” he said.
1.What is the article mainly about?
A. The connection between the TRAPPIST-1 system and Enceladus.
B. The potential for life on Saturn’s moon, Enceladus.
C. The chemical energy source on Enceladus.
D. Scientists’ constant search for life in the solar system.
2.Scientists assume that there could be life on Enceladus because ______.
A. there is evidence of a warm ocean under Enceladus’ surface
B. hot rocks and water have been discovered on Enceladus
C. hydrogen discovered on Enceladus could be a chemical energy source
D. the entire ecosystems of Enceladus are somewhat similar to those of Earth
3.According to David Rothery, the recent findings on Enceladus could mean that ______.
A. there is only one genesis of life in our galaxy
B. there could be many habitable planets, but all in the “Goldilocks zone”
C. it won’t be long before scientists find a habitable planet beyond Earth
D. alien life could exist on some other planets if it existed on Enceladus
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导学与测试系列答案科目：高中英语 来源：江苏省高中英语选修六牛津译林版练习题：Unit 2 What is happiness to you？ 题型：阅读理解
“Is there anything else you need, honey？” my dad asked me as he put three twenty?dollar bills in my hand. I was traveling back home from a family visit, and after treating me to breakfast and filling my car with gas, it was obvious that my dad wanted to make sure that I would be okay on the road.
“No, Dad. You've done so much already. Thank you！” I was overwhelmed once again by his kind acts of providing everything I needed, despite the fact I just turned 
40. Yet I realize that in my father's eyes, I will always be his little girl. He takes deep pleasure in knowing his children are all right. Now that he has enough money, he loves to give whenever he sees a need.
But this was not always the case. Divorced from my mother when I was 11, my dad couldn't be around his kids as often as he would have liked. Money was also tight; even weekend visits were rare. However, my dad stayed in constant communication with us and made sure he was involved in our lives. Though he couldn't always be there in person, I knew he was only a phone call away. I could always count on that.
Even now, almost 30 years later, I treasure knowing that I can pick up the phone and call Dad, and he'll be there for me. I have a wonderful husband, but that hasn't changed how Dad sees me. I'm still his child and he loves to see that my needs are met.
I remember a time when I was shopping in a hardware store(五金店)with Dad. I mentioned my plans to paint one wall in my house. Well, that's all it took for Dad to take action. By the time I got to the checkout(结账) line, all the supplies I picked out were put out of my hands and placed with things he bought.
Then there was the time when I took him with me to do some grocery shopping for just a few “ items”. By the time we were finished, my shopping cart was full of groceries from every shelf in the store! My sister and I joke that if you don't want Dad to buy it for you, avoid even mentioning you want something.
1.What's the best title for the passage?
A. Father's considerate love
B. Father's generosity
C. The love for children
D. Love's power
2.The author demonstrates her father's love for her mainly by________.
A. examples B. reasoning
C. persuasion D. argument
3.Which of the following is not TRUE?
A. The author's father was divorced when she was 11.
B. Now the father's economic condition is satisfying.
C. The father has a great sense of responsibility.
D. After the author got married, her father no longer get himself involved in her life.
4.The authors' two shopping experiences with father show________.
A. father paid little attention to money
B. father was quick in action
C. father paid great attention to his children's needs
D. father loved going shopping very much
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科目：高中英语 来源：河北省2017届高三上学期第16周周测英语试卷 题型：七选五
You may not be very familiar with “ecotourism”. 1.But in an age of growing environmental awareness, it is not too difficult for us to imagine and understand this new form of holiday.
Ecotourism which is considered as a kind of responsible tourism, is typically defined as travel to places where special and unusual plants, animals and cultural heritages(遗产)are the main attractions, 2.Therefore, programs concerning the protection of some natural and cultural sots also form a part of ecotourism.
Ecotourism is developing at a great speed, according to a recent report by the World Tourism Organization. Ecotourism in recent years has enjoyed an annual growth of about 5% world wide. 3.They include bird watching, hiking, diving, photography and taking part in various kinds of local cultural events.
4.However, it looks like some smaller towns and country areas may well become the new destinations for people to visit tomorrow because they are rich in ecological, cultural and historical resources.
Ecotourism has been gaining increasing recognition and popularity mainly for the relaxing, natural and vivid experience it offers to tourists. People are attracted to nature and long to be close to it. However, conflict between nature and human being is unavoidable.5.
A. The definition of ecotourism is beyond words
B. It takes ecology and culture into consideration
C. It is a new term in today’s tourism industry
D. More than 80 activities have been listed for ecotourism
E. People can have great fun enjoying nature through ecotourism
F. Big cities are still the major places that attract tourists in our society today
G. How to protect natural resources while taking advantage is of great importance
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科目：高中英语 来源：浙江省2016-2017学年高二下学期期末模拟考试英语试卷 题型：短文填空
One day, a father and his son were walking with their horse. An old man saw them and said, “You 1. (suppose) to ride a horse, not to walk it!” The father then put his son on the horse.
Soon they passed a group of people, 2. said, “That’s a lazy boy! He gets to ride the horse while his father walks.” The father decided to take his son off and get on the horse himself.3. they kept going, they came upon two 4. (passer-by). One said, “You are a 5. (self) man! Your son has to walk while you get to ride!” The man then reached down and put his son on the horse with him. 6. a while, they entered a town. Everyone started to laugh at them, 7. (say), “You are too heavy for that horse!” The father and his son didn’t know what 8. (do).
Finally, they decided to carry the horse. When they came to a bridge, the horse 9. (fall) to the water. “If you try to please 10. ,” the father told his son, “in the end, you will please no one.” Then they went home.
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科目：高中英语 来源：浙江省2016-2017学年高二下学期期末考试英语试卷 题型：书面表达
假定你是李华，校读书俱乐部负责人。俱乐部将在下周三下午三点在报告厅进行英语朗读比赛(recitation contest)。请你给外教Tom写一份电子邮件。内容如下:
1. 邀请他担任比赛评委；
2. 问他届时是否有空出席；
3. 请他向学生推荐合适的文学作品。
注意:
1. 词数80左右。
2. 可适当增加细节，以使行文连贯。
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科目：高中英语 来源：福建省莆田市2016-2017学年高一下学期第二次月考英语试卷 题型：七选五
Every one complains. Even if you argue that you are the happiest person in the world, you still complain sometimes. Sometimes you complain: without even realizing it, but rarely is it ever helpful. 1.Here are some tips to stop complaint and give up the negative thoughts:2.When you find yourself thinking or saying a negative comment about something or someone, stop and force yourself to say something positive instead. Seek the help of a cheerful friend to change you when you complain and help you to see the positive in the situation.
Make a list of things we are grateful for.
We often complain about the things we don't have without noticing those things we already have. Be grateful for what we have in our life because we are lucky simply for being ourselves. 3.
Learn to adapt to the changes. There are many things we can't change.4. Always find the positive side of each situation, regardless of however difficult the situation is. With parents' and friends' support, we can survive any life changes.
Allow yourself to vent（发泄）your feelings every once in a while.
Constantly ignored negative thoughts could add up. If you are really going through a rough time, don't be afraid to share your feelings with a close friend or family member or see a therapist.
Find what makes you happy.
5.Maybe it is time to make the hard decision to move on to another job or career.Uncover what your biggest complaints are about and see if you can change the situation to make you happy. Choose happiness, focus on the positive, and be kind always!
A. Sometimes this list can be easy, full of hobbies you enjoy.
B. Are you constantly complaining about your present job?
C. So how can you manage to force yourselves to end complaining?
D. Set down things we are thankful for and we'll see that we don't have any reason to complain.
E. Change the way you think.
F. The best and only thing we can do is to accept them.
G. Make positive people friends.
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科目：高中英语 来源：浙江省兰溪市2016-2017学年高一上学期第一次阶段性考试英语试卷 题型：翻译
1.刚开始的时候移民不能和本地人融洽相处。
At the very beginning, the settlers couldn't ________ ________ ________ ________ the native.
2.我们应当最充分利用回收材料。
We should ________ ________ ________ ________ the recycled materials.
3.每个人在这次活动中起了一定的作用。
Everyone ________ ________ ________ ________ the activity.
4.和汽车相比，自行车有许多优点。
________ ________ ________, bicycles have many ________.
5.这家人迫不及待想搬进新居。
The family ________ ________ ________ ________ move into the new house.
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科目：高中英语 来源：江苏省高中英语选修六牛津译林版练习题：Unit 4 Helping people around the world 题型：单项填空
In our childhood，we were often ________by Grandma to pay attention to our table manners.
A. demanded B. reminded
C. allowed D. hoped
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科目：高中英语 来源：辽宁省辽源市2016-2017学年高二上学期期末考试英语试卷 题型：阅读理解
I was never very neat, while my roommate Kate was extremely organized. Each of her objects had its place, but mine always hid somewhere. She even labeled(贴标签) everything. I always looked for everything. Over time, Kate got neater and I got messier. She would push my dirty clothing over, and I would lay my books on her tidy desk. We both got tired of each other.
War broke out one evening. Kate came into the room. Soon, I heard her screaming, “Take your shoes away! Why under my bed!” Deafened, I saw my shoes flying at me. I jumped to my feet and started yelling. She yelled back louder.
The room was filled with anger. We could not have stayed together for a single minute but for a phone call. Kate answered it. From her end of the conversation, I could tell right away her grandma was seriously ill. When she hung up, she quickly crawled(爬)under her covers, sobbing. Obviously, that was something she should not go through alone. All of a sudden, a warm feeling of sympathy rose up in my heart.
Slowly, I collected the pencils, took back the books, made my bed, cleaned the socks and swept the floor, even on her side. I got so into my work that I even didn’t notice Kate had sat up. She was watching, her tears dried and her expression one of disbelief. Then, she reached out her hands to grasp mine. I looked up into her eyes. She smiled at me, “Thanks.”
Kate and I stayed roommates for the rest of the year. We didn’t always agree, but we learned the key to living together: giving in, cleaning up and holding on.
1.What made Kate so angry one evening?
A. She couldn’t find her books.
B. She heard the author shouting loud.
C. She got the news that her grandma was ill.
D. She saw the author’s shoes beneath her bed.
2.The author tidied up the room most probably because______________.
A. She was scared by Kate’s anger.
B. She hated herself for being so messy
C. She wanted to show her care
D. She was asked by Kate to do so
3.How is Paragraph 1 mainly developed?
A. By analyzing分析 causes.
B. By showing differences.
C. By describing a process过程.
D. By following time order.
4.What might be the best title for the story?
A. My Friend Kate
B. Hard Work Pays Off
C. How to Be Organized
D. Learning to Be Roommates
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