Is it to control their body temperature? Save energy? Find food? Tiger sharks at the Ningaloo Reef are thought to search the seafloor for prey as they dive down and swim up. But could there be other reasons why the sharks often move up and down through the water column?
That’s what UWA student Sammy is hoping to find out for her Ph.D. research. Sammy caught 24 tiger sharks at the Ningaloo Reef and attached tracking devices to them for up to 48 hours. The devices recorded activity rates and other data 20 times a second. The tags also contained video cameras, so Sammy could see the habitats the sharks moved through and the animals they met. She watched how the sharks reacted to prey and how the prey reacted to them.
Tiger sharks can be pretty lazy — something as simple as a turtle noticing a shark and turning away could cause the shark not to bother hunting it.
“Stomach content analysis has found their normal prey items, such as turtles, rays and fish,” Sammy said. “But have also found some really interesting things, such as license plates, cans and nails.”
Sammy said that studying tiger sharks can help her better understand the ecosystem as a whole. How they move through the Ningaloo Reef and feed can help her figure out how they might be impacting the animals beneath them in the food chain.
But hours of watching tiger sharks hunt hasn’t put Sammy off the animals at all. She said her time tagging sharks at the Ningaloo Reef was the best month of her Ph.D., if not her life. “At first, I was a bit apprehensive about it ... getting that close to some very big animals,” Sammy said. “But they were very frightened once you had them restrained alongside the boat. They’d just sit there; you’d attach the tag; you’d take the line off and they’d just swim off really calmly. It was pretty amazing to see these. They’re just absolutely beautiful animals.”
1.What can be the function of the first paragraph?
A.To give an example. B.To introduce the topic.
C.To make a comparison. D.To provide the background.
2.What does Sammy want to know through her research?
A.Why tiger sharks swim up and down. B.What tiger sharks like to hunt and eat.
C.How tiger sharks react in front of humans. D.Whether tiger sharks are endangered or not.
3.What can be inferred from the stomach content analysis?
A.Tiger sharks live happily in the sea. B.Tiger sharks are sensitive to some food.
C.Tiger sharks are lazier than expected. D.Tiger sharks have a very broad diet.
4.What does the underlined word “apprehensive” in the last paragraph mean?
A.Careless. B.Curious. C.Fearful. D.Cautious.
I’m a commercial diver for Global Divers in Louisiana. I perform underwater repairs on offshore drilling equipment.
My office lies at the bottom of the sea. I wear a suit to the office. It’s a wet suit.
This time of year the water is quite cool. So what we do to keep warm is this: We have a diesel-powered industrial water heater. This equipment sucks the water out of the sea, heating it to a delightful temperature. It then pumps it down to the diver through a garden tube, which is tied to the air tube.
I’ve used it several times with no complaints. What I do when I get to the bottom and start working is take the tube and stuff it down the back of my wet suit. This floods my whole suit with warm water. It’s fantastic because it’s like working in a bathtub.
Last week, I had a bad day at the office. When I started working, everything was going well until all of a sudden, my bottom started to itch（痒）. So, of course, I scratched it. This, of course, only made things worse. Within a few seconds，my bottom started to feel a burning sensation. I pulled the tube out from my back, thinking that maybe the water was too hot, but the damage was done.
In severe pain, I realized what had happened. The hot water machine had sucked up a jellyfish（水母）and pumped it directly into my suit. When I had scratched what I thought was an itch, I was actually touching the jellyfish, and its poisonous tentacles（触角）stung me on the crack of my bottom.
I immediately informed the dive supervisor of my problem over the communicator. His instructions were unclear due to the fact that he and five other divers were all laughing loudly. 35 minutes later, I arrived at the surface. I was wearing nothing but my helmet. And my bottom was swollen.
1.What did the author think of the water heater before the incident?
A.It was useless. B.It was dangerous.
C.It was satisfying. D.It needed to be improved.
2.What actually caused the author’s discomfort while working?
A.A jellyfish. B.A bathtub.
C.The hot water. D.The wet suit.
3.How did the author probably feel after he went ashore?
A.Excited. B.Delighted. C.Calm. D.Embarrassed.
4.What is the best title for the text?
A.My Daily Work B.A Bad Day at Work
C.The Hardships of My Job D.An Office under Water
Welcome to the Harvard Information Center
Established in 1962, we meet and greet visitors from all over the world. Our mission is to serve as the “front door” to the university by providing historical and general information about the campus.
Official Historical Tour of Harvard
Student-Led Public Walking Tour
Please note: Due to ongoing construction, our tour schedule will be limited.
The Official Harvard tour departs from the Harvard Information Center in the Smith Campus Center. The tour is student-led and includes an outdoor walk through Harvard Yard, providing a history of the university, general information, and a unique view on the student’s individual experience. The tour is around one hour long, and completely free of charge.
Tour registration is done in person on a first-come, first-served basis. Tours are capped at 35 visitors. Currently we are only able to admit groups of up to 14 people on our free, public tour. If you have a group of 15 or more, reservations are required.
Group Tours and Reservations
Reservations are required for tours of 15 or more people, with an absolute maximum of 125 people. We request groups to schedule a tour 2 weeks ahead. Please note: We cannot accommodate groups that arrive without a reservation.
A Self-Guided Walking Tour of Harvard Yard
If you are interested in touring the campus on your own, you may want a self-guided walking tour. These tour pamphlets（小册子），offered in nine different languages, can be purchased from our office with a very small amount.
You may also download audio（音频的）files of historical information on each of the buildings in Harvard Yard. These files, including an audio tour, can be obtained here at no charge. The audio tour is read by current Harvard students and is composed of tracks describing landmarks throughout Harvard Yard.
1.What’s the purpose of the Harvard Information Center?
A.To introduce Harvard. B.To collect some information.
C.To provide academic service. D.To answer questions from students.
2.What do we know about the Official Harvard tour?
A.It allows others to register for your tour. B.It is led by professional tour guides.
C.It limits the number of visitors. D.It charges an entrance fee.
3.When you are visiting the campus alone, ________.
A.you can get free tour pamphlets
B.you can enjoy free audio service
C.you must buy an admission ticket
D.you must make a reservation in advance
假设你是李华，你们班的英语老师要求每个同学在课堂上分享自己交友的经验。请你根据所给提示，用英语写一篇发言稿。
1. 你是如何看待友谊的；
2. 你是怎么选择朋友的；
3. 你是如何维持与朋友之间的友谊的。
注意: 1. 词数120左右；
2. 可以适当增加细节，以使行文连贯。
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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:1.4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。
The day before yesterday, I went to the bookstore where is near our school to buy a story book. It was Saturday, so there was many people there. With the helps of a shop assistant, I quickly got the book I needed. I was about to leave when I found someone trying to steal a man's money. Although I was nervous, but I tried to think of a way to help. Suddenly, I had good idea. I stepped on the man' s foot by purpose. As expected, the man's scream gives the thief a fright, who quick walked out of the shop. After hear my explanation, the man smiled and expressed her thanks to me.
用单词的正确形式拼写
1.Only once in his life did Jack__________(允许) himself to lose control of his emotions.
2.Mike has to__________(减少) his expenses because he lost his job last month.
3.There is a large__________(人群) in the street waiting for the president to arrive.
4.It's__________(明显的) that the manger of the coffee shop is smart.
5.Yesterday I__________(咨询) my uncle about the matter that happened in his hospital.
6.In 1959 the company produced the ELEA computer__________(系统).
7.I enjoy a__________ (聊天) with a friend about football.
8.Keep in touch with family members__________(无论在哪里) you are in the world.
9.His only aim is to__________(代表) China at the Olympics.
10.The teachers were very __________(给……留下极深的印象) by your performance in the exam.
