题目
题型:不详难度:来源:
Since the 1960s, the United States and a handful of other countries have trained dolphins and sea lions to detect sea mines and swimmers, to recover inert torpedoes(鱼雷)and to test objects used in Naval exercises.
Program officials estimate that the sea lions in the Marine Mammal Program have recovered millions of dollars of U.S. Naval torpedoes and instrumentation dropped on the sea floor.
The U.S. Navy kept its Marine Mammal Program a secret until the 1990s, and this spring CNN became one of only a handful of media outlets to see firsthand how the program works.
The program has trained about 75 Pacific bottlenose dolphins, with natural biosonar (生物声纳) that tracks better than any manmade device; and 35 California sea lions, with superb underwater eyesight.
Not only do these trained marine mammals track and retrieve millions of dollars in U. S. military equipment, they are also helping to save lives.
The Navy won"t disclose whether the dolphins and sea lions have effectively intercepted (阻拦)terrorists attempting to do harm to any U.S. facilities.
"Either way, it serves as a deterrent(阻碍) effect." says Christian Harris, operations supervisor for the program. The mammals can be deployed(调动) via C-130 cargo aircraft to perform their missions anywhere in the world within 72 hours. They have been used in exercises from Alaska to Hawaii, operating in great temperature and environmental ranges. They also have the capability to operate off vessels.
Dolphins most recently were deployed in the Iraq war, performing mine detection and clearance operations in the Persian Gulf to ensure safe passage for humanitarian ships delivering aid. Some of these Iraq war "veterans" are now back home, tasked with a new mission: guarding nuclear submarines in their homeports of Bremerton, Washington, and Groton, Connecticut.
小题1:The underlined word "retrieve" in Paragraph 6 can be replaced by ________.
A.find out | B.recover | C.save | D.detect |
A.To detect sea mines and swimmers. |
B.To save lives of people. |
C.To recover inert torpedoes. |
D.To help the U.S. Naval test equipment. |
A.These trained marine mammals eat pounds of fish a day. |
B.The U.S. Navy performed the Marine Mammal Program for about 30 years secretly. |
C.These mammals can carry out a task everywhere. |
D.A lot of countries will train dolphins and sea lions for anti-terrorism. |
A.The Special Skills of Marine Mammals | B.The U.S. Anti-terrorism Program |
C.Exceptional Anti-terrorism Member | D.Trained Marine Mammals |
答案
小题1:B
小题2:B
小题3:B
小题4:C
解析
试题分析:可爱乖巧的海豚和海狮充当高效反恐先锋(pioneer),成为美国反恐大军中的佼佼者。它们不仅可为美国海军减少巨额损失,同时还能帮助救赎生命。
小题1:通过上下文可知“retrieve”有“get sth back”之意。在第三段“...have recovered millions of dollars of U.S. Naval torpedoes...”中“recover”刚好符合此意。选B。
小题2:见第二段。“to save lives of people”是执行该计划产生的结果,而非目的。选B。小题3:由第二段“Since the 1960s, the United States and a handful of other countries have trained dolphins and sea lions”及第四段“The U.S. Navy kept its Marine Mammal Program a secret until the 1990s”可知美国海军秘密进行该计划大约30年。选B。
小题4:主旨题:从文章的第一二段的内容可知:美国在训练海豚和海狮充当高效反恐先锋。选C。
点评:文章内容有些难度,但题目主要考查了细节题,只要带着题目到文中找到关键的句子,就可以得到答案,同时要注重综合语言能力的运用,结合语境,做出准确的判断。
核心考点
试题【In a little-known part of the counter-terrorism(反恐怖主义) world, one of the most ef】;主要考察你对题材分类等知识点的理解。[详细]
举一反三
of its 200 inhabited islands,which are spread across an area of"35,000 square miles,99 are good resorts(旅游胜地).So many tourists come every year,more than double the local population.Of these,over l 00,000 travel from the U K.The capital,Mal6,is four times more densely populated than London.Given these facts,it’S hardly surprising that the Maldives has a waste disposal problem.
Y ears a90,when the tourists left,the government had to deal with a stream of rubbish.Their solution was to turn one of the islands into a dumping ground.Four miles west of Mal6 is the country’s dumping ground,Thilafushi.What you are seeing here is a view of the Maldives on which no honeymooners will ever clap eyes.Each visitor produces 3.5 kg of waste per day.The country dumps more than 330 tons of rubbish on the island every day.
Now,since many waste boats,fed up with waiting seven hours or more,directly offload their goods into the sea,the government of the Maldives has banned the dumping of waste on the island.S0,the waste boats ship the rubbish to India instead.
小题1:What is the main cause of the waste disposal problem?
A.The big local population. | B.Too many waste boats. |
C.The large number of tourists. | D.Open fires on the islands. |
A.it’s quite similar to | B.it’S a long distance from |
C.it’s a loud shout from | D.it’S totally different from |
A.It iS much more crowded in Mal6 than in London. |
B.Another island will be used as a dumping ground. |
C.No honeymooners are willing to visit the Maldives. |
D.Waste on islands will be offloaded directly into the sea. |
A.To attract more tourists to the Maldives. |
B.To state the waste disposal problem in the Maldives. |
C.To call on us to protect the environment. |
D.To explain the causes of pollution in the Maldives. |
Researchers identified different“personalities” in their fish by observing the boldness or shyness of individuals,according to The Nature.Like people,some fish are very confident in the face of novelty(新奇事物)or conflict;while others are silent and fear.
The scientists selected particularly bold and shy rainbow trout,and tested whether they changed their outlook depending on what life threw at them.They arranged some fish to fight and others to watch to see how both the participants and observers responded to victories and defeats.Winning or losing a fight,or even watching fellow fish overcome the difficulties influenced the future behavior of the creatures studied in the lab.
The researchers made fish compete with much larger or smaller opponents.to ensure that they would win or lose their fights.These bold fish that won their fights tended to be even bolder when later presented with a novel food item;losing their fight caused them to be much more cautious.
Fish also learn by watching others.Bold fish watching a shy fish exploring a mystery object were much more nervous when later given a novelty item for themselves.
Predictably,shy fish that won a fight also gained more confidence,but surprisingly,shy fish that lost their fights also grew bolder when exploring strange new food,Sneddon said,adding that this could be due to what she calls a“desperado effect”(亡命徒效应).
The new research suggests that animals can gradually adapt their personalities.The results echo the effects that life experience can have on human.
小题1:What does.the underlined word“creatures’’probably refer to?
A.Fish. | B.Participants. | C.Observers. | D.Researchers. |
A.a conclusion of the research |
B.an explanation of fish characters |
C.a statement of the experiment |
D.a description of fish fights |
A.Bold losing fish become—e bolder when presented With a novel food item. |
B.Losing their fights causes the bold fish to be much more courageous. |
C.Bold fish watching a shy fish exploring a mystery get less nervous. |
D.Shy fish losing fights grow more confident in exploring new food. |
A.Fish have stress in the fierce fights. |
B.Fish care about winning or losing a fight. |
C.Fish have adaptable personalities. |
D.Fish can learn a lot by watching others. |
Japan Earthquake, Tsunami and Nuclear Crisis
The earthquake off the coast of Japan on March 11, 2011 was one of the biggest recorded, measuring 9 on the Richter scale(里氏震级).
It was the resulting tsunami, however, that caused the most destruction.It devastated the northeast of Japan, leaving many thousands dead or missing, and -hundreds of thousands homeless or leaving the area.In addition, various power generators(发电机组) failed.Some older nuclear power stations risked meltdown and suffered explosions and radioactive leaks.Workers battled for weeks to try and bring the situation under control.Radioactive material was detected in various places.
It is thought that the cost of the earthquake and tsunami could be over $ 300 billion-the world"s most expensive natural disaster on record.
Hurricane Katrina
Hurricane Katrina was a destroyed category 4(四级) hurricane, the highest category, that hit the Gulf of Mexico and various Southern regions of the United States at the end of August, 2005, causing the worst damage in that country"s history, estimated at $ 100 billion.The famous New Orleans city and surrounding areas were worst hit as much of it sits some 6 feet below sea level.City defenses, such as banks, only designed for categary 3 type hurricanes, gave way, leading to enormous flooding and associated damage, death and displacement of around 100, 000 people who either chose to say the course, or could not afford to flee.
小题1:Where would this passage most probably appear?
A.In a textbook. | B.In a magazine. | C.In a paper. | D.In a website. |
A.Because they are lazy and poor. |
B.Because they desire help from rich countries. |
C.Because they lack resources to deal with the destruction and rebuild their home. |
D.Because they never think of protecting their home. |
A.Built. | B.Completed. | C.Discovered. | D.Destroyed. |
A.Radioactive material. | B.Tsunami. |
C.Earthquake. | D.Power generators" explosion. |
A.Hurricane Katrina also hit the northern part of the USA.
B.Hurricane Katrina caused the second the worst damage in the history of the USA.
C.All parts of New Orleans city were below sea level.
D.City defenses in New Orleans couldn"t deal with Hurricane Katrina.
Practice where you can and when you can. And practice is good — whether you speak to someone who is a native English speaker or not.
It’s important to build up your confidence. If possible, use the simple sentence structure that you know is correct, so that you can concentrate on getting your message across.
Try to experiment with the English you know. Apply (应用) words and phrases you know to new situations. Native English speakers are likely to correct you if you use the wrong word. They usually don’t mind if you use wrong grammar.
Try to respond to what people say to you. You can often get clues to what people think by looking at their body language. Respond to them in a natural way.
Never translate everything into your own language. It takes you much time and you’ll find it difficult to find an English answer right away. You don’t know how to do well. The more you want to act well, the more slowly you act. This will make you hesitant.
If you forget a word, do what native English speakers do all the time, and say things that ‘fill’ the conversation. This is better than remaining completely silent. Try using ‘um’, ‘er’, if you forget the word.
Don’t speak too fast! It’s important to use a natural rhythm (节奏) in speaking English, but if you speak too fast it will be difficult for people to understand you.
Try to relax when you speak, and you’ll find that your mouth does most of the pronunciation work for you. Speak English at a normal speed.
Final tips: Try to become less hesitant. Don’t be shy to speak — the more you do it, the more confident you’ll become. Remember to be polite — use “please” and “thank you” if you ask someone to do something for you.
小题1:What is the text mainly about?
A.Good ways of studying English well. |
B.Suggestions on becoming a confident speaker. |
C.Things to pay attention to when speaking English. |
D.How to correct your mistakes as you speak English. |
A.9. | B.10. | C.11. | D.12. |
A.sure about what to do |
B.fast to make a good decision |
C.successful in answering questions |
D.uncertain about how to express yourself |
A.English beginners | B.native English speakers |
C.English teachers | D.language experts |
Fly me to the moon? That’s not far enough. On September 14, 2011, NASA released designs for a superrocket, the Space Launch System (SLS). This time the final destination will be Mars.
The SLS is a huge, liquid-fuelled rocket. If it is fully developed, it will be the most powerful rocket ever built. Its lift capability will be much bigger than that of the space shuttle of Saturn 5, the rocket that sent the Apollo missions to the moon.
NASA is planning to launch its first unmanned test flight in 2017. It is hoped that the first crew will fly in 2021 and astronauts will make it to a nearby asteroid(小行星) in 2025. NASA hopes to send the rocket and astronauts to Mars from the asteroid by the 2030s, according to the Associated Press (AP).
NASA used liquid rockets to send Apollo, Gemini and Mercury into space, but later changed to solid rockets boosters(助推火箭) because they were cheaper. Tragically, however, a booster flaw(缺陷) caused the space shuttle Challenger to crash in 1986. The new project plans to return to liquid fuel.
According to AP, the rockets will at first be able to carry 77 to 110 tons of payload(净载重量). Eventually they will be able to carry 143 tons into space, maybe even as many as 165 tons, NASA officials said. By comparison, the Saturn 5 booster could lift 130 tons and the space shuttle just 27 tons.
However, unlike reusable shuttles, these powerful rockets are mostly one use only. New ones have to be built for every launch. This will be very costly.
NASA estimates that it will cost about $3 billion (19 billion yuan) per year, or $18 billion until the first test flight in 2017. NASA hopes to make money by allowing private companies to send astronauts to the International Space Station like giant taxi services, so that the program can be “sustainable”.
“This is perhaps the biggest thing for space exploration in decades,” said Senator Bill Nelson, a former astronaut. “The goal is to fly humans safely beyond low-Earth orbit(轨道) and deep into outer space where we cannot only survive, but one day also live.”
小题1:What is the outstanding feature of the SLS?
A.It’s equipped with an advanced control system. |
B.It’s the first unmanned space shuttle in the world. |
C.It’s the only vehicle that can fly astronauts to the moon. |
D.It can send a lot more goods and passengers into space. |
A.An aircraft that had a deadly flaw and crashed in 1986. |
B.A series of rockets that once sent astronauts to the moon. |
C.An unmanned space shuttle that was once famous in the world. |
D.A kind of launch vehicle that will be used to carry astronauts to Mars. |
A.it is less costly |
B.it is much safer |
C.it can last longer |
D.it is more environmentally friendly |
A.about 6 | B.about 10 |
C.less than 14 | D.more than 19 |
A.the SLS program is planning to make reusable rockets |
B.the goal of the SLS program is to enable humans to live on the moon |
C.the US government may not have provided enough money for the SLS program |
D.NASA will use SLS as a space taxi between the Earth and Mars |
最新试题
- 1仿照下面的示例,以“温暖”为话题,另写几个句子,要求内容贴切,句式与示例相同。(4分)文化因交流而丰富,心灵因交流而沟通
- 2关于中国古代科技成就在世界科技成就中所占比例,李约瑟在《自然科学大事年表》中用图表作了说明。以下图表主要说明了( )
- 3我国已经陆续发射了多颗地球同步轨道静止通信卫星,这类卫星相对于________静止不动。它绕地心转动一周大约需要____
- 4David studied hard before the examination, and it ______. He
- 5在Rt△ABC中∠C=90°,a、b分别为∠A、∠B所对的边,若b=3a,则∠B=______.
- 6大雪无情人有情,众志成城抗雪灾。在全国人民抗击雪灾的过程中,有无数的热心人伸出援助之手,关心、帮助他人,用自己的实际行动
- 7下列实验操作不能达到预期实验目的的是( ) 实验目的实验操作A鉴别CO32-和 SO42-分别加入饱和CaCl2溶
- 8【题文】设集合 ( )A.{1,2,3}B.{1,2,4}C.{2,3,4}
- 9 听下面5段对话。每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。听完每
- 10玉米果穗上常有缺粒现象发生,造成这种现象的原因主要是( )A.水分不足B.肥料不足C.传粉不足D.光照不足
热门考点
- 11971—1980年与新中国建立外交关系的多达69个,超过了1949—1970年,这种局面的出现主要得益于A.中国经济建
- 2现代文阅读(9分,每小题3分)神奇的“脑控”技术一个人通过脑电波对另一人的大脑进行“控制”,这听起来像是科幻小说中的情节
- 322.据《文汇报》援引《日本新华侨报》11日报道,2009年10日中午,日本右翼团体在东京池袋地区中国人的物产店——中华
- 4雨后操场,小明从他前面2米远的一小块积水中看到了旗杆顶端的倒影,如果旗杆底端到积水的距离为20米,小明眼睛离地面1.5米
- 5“第一条:立法权由众议院与参议院两院行使。第二条:共和国总统,由参议院与众议院联合而成的国民议会依绝对多数票选出。”引言
- 6阅读下列文字,然后回答问题。(3分)子曰:“人而无信,不知其可也。大车无輗,小车无軏,其何以行之哉?”子曰:“言必信,行
- 7文化的发展受多种因素的影响。决定文化发展方向的因素是 [ ]A.思想运动B.科学技术的进步 C.文化传承D.生产
- 8已知函数f(x)=cos2x+3sin2x①求f(x)的最小正周期及其单调区间;②当x取何值时,f(x)取最大值?最大值
- 9三角形的面积为12cm2,把它的底y表示成这边上的高x的函数,那么表达式是 y= (x>0) ,其图象位于第(
- 10将下列句子译成英语,并将所译句子写在答题卡上标有题号的横线上。小题1:你能告诉我苏州与吴江之间的地铁何时能建成?