日本成人片在线_久久免费精品视频_国产午夜精品久久久久久免费视_校花撩起jk露出白色内裤国产精品_av影片免费在线观看_国产小视频在线看_最新av免费在线观看_99久久99久久精品国产片_欧美成人猛片aaaaaaa_蜜桃免费网站一区二区三区

精英家教網 > 高中英語 > 題目詳情

The summer beach season is prime time for shark attacks. It seems like sharks are attacking all the time. But that is something of an illusion. The number of attacks is very small.

How does a shark hunt? Muscles and fins give the shark its speed and maneuverability in the water. A shark’s front fins act like the wings of a plane and let it “fly” through the water. The tail acts like a high-power propeller

But the big thing that gives the shark its edge in the ocean is its sensory package. The package includes the shark’s eyes, ears, skin, nose and mouth, as weir as electric sensing.

A shark’s nose is probably its most important sense. If you were to put a single drop of blood in a swimming pool, a great white shark could smell that. And they can tell the direction that the smell is coming from.

Sharks handle their electric sensing using cell located in the head. Whenever something moves using its muscles, a shark can detect the electrical impulses flowing to those muscles. A shark can electrically “see” anything that has muscles even if it is hiding or the water is not clear.

Sharks even have vibration sensors in their skin. Even something moves near the shark, tubes pick up the pressure changes and hairs inside the tubes send signals to the brain. This extra sense allows a shark to turn quickly and attack again.

When you put all these different senses together , it makes the shark a nearly ideal hunter. A shark can detect prey from miles away and then use eyes, electrosensing and movement sensing to home in.

Strangely, sharks do not seem to use these senses to home in on people. The very low number of sharks tells us that sharks do not hunt people in a regular basis. On the other hand, people love to hunt sharks, Millions of sharks die every year.  Without protection, extinction is a definite possibility.

68.From the text, we can know that_________________.

A. it is true that sharks are attacking all the time

B. a shark can see anything that has muscles even if it is hiding.

C. sharks deal with their electric sensing using cell located in the skin

D. what gives the shark its speed and maneuverability is fins and muscles

69.What gives the shark its edge in the ocean according to the text?

A. Its muscle.                                                B. Its nose.                       

C. Its sensory package.                                     D. Its fins

70. The underlined phrase home in on means___________.

A. swim                 B. move                   C. hunt                        D. smell

71.In this text, the writer implies that__________.

A.there ara many shark attacks                      B. humans beings should protect sharks    

C. human beings dislike hunting shark              D. sharks’ nose is very important

練習冊系列答案
相關習題

科目:高中英語 來源:2014屆黑龍江哈爾濱第六中學高二下期中考試英語卷(解析版) 題型:單項填空

In the summer, large crops of fruit may be_______ by freezing or bottling.

A.reserved          B.deserved          C.served            D.preserved

 

查看答案和解析>>

科目:高中英語 來源:2012年人教版高中英語選修八Unit1練習卷(解析版) 題型:閱讀理解

Dog Translation Products Coming to U. S.

A Japanese toy maker declares that they have developed a gadget that translates dog barks into human language and plans to begin selling the gadget——under the name of Bowlingual——in U. S. pet stores and gift shops this summer.

Tokyo-based Takara Co. Ltd. says about 300, 000 of the dog translator gadgets have been sold since it was on sale in Japan late last year. It is forecasting far bigger sales once an English language translation for dogs comes to America in August. The United States is home to about 67 million dogs, more than six times the number in Japan.

"We know that the Americans love their dogs so much, so we don't think they will mind spending $ 120 on this product," the Takara marketing manager said during an interview at a recent pet products conference in Atlanta.

Regarded as one of the coolest inventions of 2002 by Time magazine, Bowlingual is made up of a 3 - inch long wireless microphone that is fastened to a dog collar and sends out sounds to a small console (控制臺) that is connected to a database (數據庫). The console divides each bark into six emotional types——happiness, sadness, disappointment, anger, threat and desire——and shows common phrases, such as "You're ticking me off," that fit the dog's emotional state.

Takara says it has spent millions of dollars developing the gadget in cooperation with famous sound experts and animal behaviorists.

One thing that does appear certain is that the markets for animal translation products will likely remain a dog's world since Takara has no plans to develop a similar gadget for cats. "They are too unpredictable (反復無常) , " the marketing manager said.

1.This passage mainly tells us that Bowlingual ___________.

A. was invented in Japan         B. has developed quickly

C. will be sold in America        D. sells well for its price

2.The underlined word "they" in the last paragraph refers to ___________.

A. markets    B. products     C. plans      D. cats

3.When was this passage most probably published?

A. In the winter of 2002.       B. In the spring of 2003.

C. In the summer of 2002.       D. In the autumn of 2003.

4.From the passage, we can see that Takara Co. Ltd. is ___________ the sale of its new product.

A. proud of             B. satisfied with

C. confident of           D. worried about

 

查看答案和解析>>

科目:高中英語 來源:2012年人教版高中英語選修八Unit1練習卷(解析版) 題型:完型填空

What an exciting day it was for Jennifer and Valerie! They 26  friends since Grade Three and had  27 many of their high school experiences. Now they were driving together to their final high school event. Today was 28 day at Laman High School.  29 they were close friends, they were different in many ways. Jennifer was a fairly 30  student while Valerie did just enough to get by and was mainly 31  in a good social life.

"Isn't it 32  that we're all finished?" said Valerie. "I'm really looking forward to having a 33  time this summer."

"  34  be nice," Jennifer replied. "I'm afraid I'm going to have to work most of the summer to help pay for my college expenses. "

Jennifer's parents had only a small 35  and she had made up her mind to have a career in which he could 36  all the things her 37  could not.

Valerie,  38  , came firm a fairly wealthy family. She had little desire to work hard for  39  she had always taken for granted.

"I really don't want to go to college for a while," she 40  . "My uncle 41 a restaurant in the Bahamas and he has 42  me to spend a year there 43  a waitress. That should give me plenty of 44  for the beach. "

"It seems 45  will really be going different ways now," thought Jennifer.

1.A.has been       B. were C. had been            D. would be

2.A.learned       B. obtained  C. remembered      D. shared

3.A.exam        B. sports     C. graduatioD. working

4.A.If         B. Because     C. Although    D. When

5.A.diligent          B. polite   C. active        D. favorite

6.A.specialized        B. relievedC. envied   D. interested

7.A.certain          B. great     C. unfortunate        D. annoying

8.A.nice        B. high         C. bad        D. happy

9.A.Can        B. Shall     C. Must        D. Need

10.A.income      B. problem     C. family       D. difference

11.A .afford         B. give      C. support          D. send

12.A .teachers     B. parents    C. friends      D. relatives

13.A.in fact   B. in a way  C. as a result        D.on the contrary

14.A.what            B. whom      C. that        D. these

15.A.admitted B. complain     C. proposed      D. screamed

16.A.opens    B. runs      C. works            D. makes

17.A.helped  B. assured     C. invited          D. promised

18.A.on        B. do       C. like             D. as

19.A.peace      B. work      C. energy            D. time

20.A.I        B. we       C. she             D. they

 

查看答案和解析>>

科目:高中英語 來源:語音知識 題型:閱讀理解

Summer Holiday Fun 2010 !

The summer holidays are upon us again. Here is our guide to summer holiday fun in Peterborough!

Peterborough Museum

The Age of the Dinosaurs is the museum’s main attraction this summer. Get up close to prehistoric creatures via some great hands—on exhibits! Watch out for monsters lurking around every ember! The museum is open from 10: 00am to 5: 00pm Monday to Saturday, and from 12: 00pm to 4: 00 pm on Sundays in August.

Call 01733 864663 for details

Saxon Youth Club

School holiday fun: Young people aged 13-19 will be able to produce their own music, compete in spots activities, or try their hand at cooking at Saxon Youth Club,Saxon Community Centre, Norman Road. Peterborough every Monday and Wednesday from 3: 00pm. Moreover, an aero ball tournament will take place on Thursday 12th August between 3: 30pm and 6: 30pm.

Call 0135 3720274 for details

Houghton Mill   

Alice through the Looking Class—a new production of the family favorite on Monday 30th August. Bring rugs or chairs to sit on and a picnic if you wish to eat during the play. Gates open 5: 30pm, performance 6: 30pm—8: 30pm. Tea room will be open until end of the interval. Adult £10. Child£7. Family £20.

Booking advisable on 0845 4505157.

Farmland Museum and Denny Abbey

Farmland Games: From Wellie Wading to Pretend Ploughing matches, come and join the Farmland Team. Collect your sporting stickers and create a colorful rosette that is fit for a winner!No need to book, just turn up between 12: 00pm and 4: 00pm on Thursday 19th August. Suitable for children aged four and above, each child should be accompanied by an adult and all activities are included in the normal admission price Tickets Cost£7 per child.

For further information, call 01223 810080. 

53. If you are interested in cooking, you can go to______.

A. Peterborough Museum                    B. Houghton Mill

C. Saxon Youth Club                           D. Farmland Museum

54. You want to watch the new play with your parents, so it will cost you______.

A. £7          B. £17               C. £27                      D. £20

55. Which of the following activities needs parents’ company?

A. Playing farmland games               B. Watching a new play.

C. Competing in spots activities.         D. Visiting the dinosaur exhibition.

56. If Tom comes to Peterborough for amusement on August 19, he will have ______activities to choose from for himself.

A. one activity    B. two activities        C. three activities   D. four activities

 

查看答案和解析>>

科目:高中英語 來源:江蘇省無錫市2009-2010學年度高一第一學期期末考試 題型:閱讀理解

第四部分閱讀理解(共15小題;每小題2分,滿分30分)

A

In the summer of 1978 an English farmer was driving his tractor through a field of wheat when he discovered that some of his wheat was lying flat on the ground. The flattened(變平的) wheat formed a circle about six meters across. Around this circle were four smaller circles of flattened wheat. The five circles were in a formation(構造) like five dots (點). During the following years, farmers in England found the strange circles in their fields more and more often.

The circles are called “crop circles” because they appear in the fields of grain—usually wheat or corn. The grain in the circles lies flat on the ground but is never broken; it continues to grow, and farmers can later harvest it .Farmers always discover the crop circles in the morning, so the circles probably form at night. They appear only in the months from May to September.

At first, people thought that the circles were a hoax. Probably young people were making them as a joke ,or farmers were making them to attract tourists .To prove that the circles were a hoax, people tried to make circles exactly like the ones that farmers had found. They couldn’t do it .They couldn’t enter a field of grain without leaving tracks, and they couldn’t flatten the grain without breaking it.

Many people believe that beings from outer space are making the circles to communicate(交流)with us from far away and that the crop circles are messages from them.

Scientists who have studied the crop circles suggested several possibilities. Some scientists say that a downward rush of wind leads to the formation of the circles—the same downward rush of air that sometimes causes an airplane to crash(墜毀).Other scientists say that forces within the earth cause the circles to appear. There is one problem with all these scientific explanations: crop circles often appear in formations, like the five-dot formation. It is hard to believe that any natural force could form those.

61. In the summer of 1978 , an English farmer discovered in his field that______.      

A.some of his wheat had been damaged

B.his grain was growing up in circles

C.his grain was moved into several circles

D.some of his wheat had fallen onto the ground

62. According to the text, the underlined part “hoax” (line 1, para.3 ) probably means       .

A.an action made to fool people

B.a special way to plant crops

C.a research on the force of winds

D.an experiment for the protection of crops

63. Which of the following may prove that the crop circles are not made by man?

A.The farmers couldn’t step out of the field.

B.The farmers couldn’t make the circles round.

C.The farmers couldn’t leave without footprints.

D.The farmers couldn’t keep the wheat straight up.

64. That the crop circles are made by       is probably true.

A.air movement                               B.airplane crashes

C.new farming techniques                 D.unknown flying objects

 

查看答案和解析>>

同步練習冊答案
国产农村妇女精品| 免费黄在线观看| 免费看毛片的网站| 日本伦理一区二区三区| 日韩精品国产一区二区| 一本色道久久综合无码人妻| 天天摸天天碰天天爽天天弄| 风间由美一区| 超碰在线视屏| 一区二区精彩视频| 欧美喷水视频| 国产综合色产在线精品| 久久久精品影视| 午夜精品123| 日韩一区二区三区免费看| 中文字幕日韩精品在线| 日本一区二区三区在线播放| 国产乱码精品一区二区三区卡| 亚洲精品欧洲精品| 国产成人无码av在线播放dvd| 在线播放av网址| 欧美做爰爽爽爽爽爽爽| 国产毛片毛片毛片毛片| 毛片在线播放网址| 亚洲天堂1区| 成人免费a**址| 奇米四色…亚洲| 国产欧美一区二区三区在线看蜜臀| 亚洲成人精品一区| 中文字幕乱码中文字幕| 一级片在线观看视频| 青青久草在线| 欧美与亚洲与日本直播| 精品国产日韩欧美| 美腿丝袜亚洲一区| **欧美大码日韩| 欧美一区二区三区性视频| 伦理中文字幕亚洲| 国产麻豆乱码精品一区二区三区| 精品久久久久久无码中文野结衣| 黑人玩弄人妻一区二区三区| 国产情侣在线视频| 亚洲综合在线一区| 欧美三级精品| 天天射天天综合网| 成人深夜视频在线观看| 欧美性生交大片免费| 在线精品高清中文字幕| 亚洲自拍欧美色图| 久久久一本二本三本| 日韩女同一区二区三区| 国产片在线播放| 50度灰在线| 婷婷精品视频| 国内精品伊人久久久久影院对白| 亚洲成人久久影院| 中文字幕亚洲一区在线观看| aaa级精品久久久国产片| 18岁网站在线观看| 日韩av手机在线免费观看| 亚洲av无码国产精品永久一区| 日本成人不卡| 成人在线免费观看视频| 东方欧美亚洲色图在线| 欧美日韩在线三级| 91大神福利视频在线| 国产麻豆电影在线观看| 丰腴饱满的极品熟妇| 精品国产乱码久久久久久蜜臀网站| 丁香花电影在线观看完整版| 先锋资源久久| 国产午夜亚洲精品不卡| japanese23hdxxxx日韩| 亚洲十八**毛片| 欧美黄色aaaa| 中文在线一区二区| 亚洲欧美日韩中文视频| 精品国产免费人成电影在线观... 精品国产免费久久久久久尖叫 | 福利资源在线久| 日韩一区二区三区四区五区| 先锋亚洲精品| 欧美午夜影院在线视频| 午夜精品美女自拍福到在线| 日韩视频 中文字幕| 亚洲一二三四五六区| 在线播放你懂得| 第四色在线一区二区| 国内不卡的二区三区中文字幕| 欧美日韩久久久一区| 国产不卡在线观看| 免费日韩中文字幕| 蜜臀精品一区二区三区| 2020日本在线视频中文字幕| 欧美日韩亚洲三区| 亚洲综合偷拍欧美一区色| 九九久久综合网站| 日本大片免费看| 久久婷婷一区二区| av色综合久久天堂av色综合在| 欧美大黑bbbbbbbbb在线| 日本一区二区动态图| 中文字幕亚洲欧美一区二区三区 | 国 产 黄 色 大 片| 日韩综合av| 国产精品综合网| 精品国产区一区| 国产伦精品一区二区三区四区视频 | 91精品秘密在线观看| 亚洲激情自拍视频| 午夜免费日韩视频| 校园春色 亚洲色图| 91在线视频国产| 久久亚洲人体| av免费在线观看不卡| 五月激情婷婷网| 看全色黄大色大片免费久久久| www.欧美.com| 色吧影院999| 久久人妻无码一区二区| 精品欧美一区二区三区免费观看 | 欧美三片在线视频观看| 91天堂在线视频| 男男一级淫片免费播放| 一区二区成人| 日韩情爱电影在线观看| 亚洲一区自拍偷拍| 国产精品久久精品| 精品人妻一区二区三区日产| 色综合成人av| 欧美日本三区| 欧美挠脚心视频网站| 国产女主播一区二区| 秋霞网一区二区三区| av黄色在线| 麻豆成人综合网| 亚洲国产天堂久久综合| 超碰成人在线免费观看| 日本高清不卡码| www.久久99| 国产视频亚洲色图| 97成人精品视频在线观看| 日本77777| 亚洲日本伦理| 亚洲特级毛片| 欧美一级日韩不卡播放免费| 日本一区二区三区四区高清视频 | 男的操女的网站| 色黄视频在线观看| 成人短视频下载| 久久97久久97精品免视看| 亚洲国产日韩欧美在线观看| 伊人春色在线| 在线成人av| 亚洲电影中文字幕| 日本免费a视频| 国产成人三级一区二区在线观看一| 成人av婷婷| 亚洲午夜精品在线| 超碰97在线人人| 国产高潮流白浆| 色猫猫成人app| 成人三级黄色免费网站| 久久久久久久性潮| 国产亚洲人成网站| 国产精品久久久久久久一区探花| 黄色录像a级片| 在线免费观看污| 国产成人精品在线看| 爱福利视频一区| 人妻体体内射精一区二区| av资源网在线观看| 久久99精品国产麻豆婷婷| 日韩视频―中文字幕| 黄色一级片免费播放| 1769视频在线播放免费观看| 久久国产夜色精品鲁鲁99| 日韩色av导航| 少妇献身老头系列| 国产一线二线在线观看| 99久久综合国产精品| 国产91免费看片| 影音先锋男人看片资源| 欧美天堂一区二区| 亚洲精品伦理在线| 久久国产精品久久精品国产| 糖心vlog精品一区二区| 三区四区不卡| 精品国产第一区二区三区观看体验| 水蜜桃色314在线观看| 最新国产在线视频| 麻豆国产精品777777在线| 欧美美女18p| 亚洲色成人网站www永久四虎| 吉吉日韩欧美| 亚洲精品中文字幕在线观看| 精品网站在线看| 亚洲综合精品国产一区二区三区| sdde在线播放一区二区| 日韩视频免费观看高清在线视频| 国产一级爱c视频| 福利片在线看| av电影天堂一区二区在线| 国产精品亚洲网站| 精品在线播放视频| 日本电影一区二区| 亚洲精品国精品久久99热| 日韩av自拍偷拍| 国产精品蜜芽在线观看| 亚洲欧美另类小说| 四虎影院一区二区三区| 中文字幕2018| 久久精品国产免费看久久精品| 91精品国产精品| 久久久久久久久艹| 欧美艳星介绍134位艳星| 亚洲国产欧美一区| 国产精品美腿一区在线看| 日本免费在线精品| 深夜福利影院在线观看| 夜色77av精品影院| 亚洲成人国产精品| 亚洲性图第一页| 99只有精品| 日本精品视频一区二区三区| www.射射射| 成人高清免费在线| 中文字幕一区在线观看视频| 日本a级片久久久| 国产传媒视频在线观看| 国产精品一卡二卡| 51精品国产人成在线观看| 亚洲天堂视频在线| 亚洲在线观看| 国产成人一区二区三区电影| 依依成人综合网| 红桃视频亚洲| 国内精品伊人久久| 中文字幕一区二区三区精品| 欧美在线91| 欧美成人三级视频网站| 欧美成欧美va| 亚洲综合自拍| 欧美精品www| 欧美三级一区二区三区| 激情久久中文字幕| 欧美亚洲激情视频| 日韩一级片中文字幕| 久久激情久久| 国产日韩在线观看av| 国产视频一区二区三区四区五区| 久久草av在线| 不卡一区二区三区视频| 人妻丰满熟妇av无码区hd| 国产成人精品免费在线| 国产女人水真多18毛片18精品| 小香蕉视频在线| 久久精品一区蜜桃臀影院| 一个色的综合| a视频在线播放| 黑人欧美xxxx| 天天摸天天舔天天操| 日日夜夜综合| 亚洲精品久久在线| 人与嘼交av免费| 亚洲h色精品| 欧美亚洲成人网| 国产欧美熟妇另类久久久 | 中文字幕日韩在线播放| 欧美激情精品久久久久久免费| 91久久电影| 日本高清+成人网在线观看| 国产精品福利电影| 国产成人精品网址| 久久精品不卡| 久久露脸国产精品| 亚洲一级片免费看| 国产福利视频一区二区三区| 欧美一区二区综合| 日本免费在线视频| 欧美日韩激情小视频| 色婷婷一区二区三区在线观看| 日韩免费成人| 久久精品国产免费观看| 国产精品久久久久久人| 黄色日韩网站视频| 日韩欧美三级一区二区| 美女尤物在线视频| 在线不卡欧美精品一区二区三区| 成人精品在线观看视频| 午夜精品久久久久久久四虎美女版| 午夜精品福利电影| av中文字幕第一页| 久久综合色鬼综合色| 精品丰满人妻无套内射| 精品国产黄a∨片高清在线| 日韩成人网免费视频| 国产污视频在线看| 九色综合国产一区二区三区| 日韩av在线电影观看| 欧美人与性动交α欧美精品图片| 欧美日韩视频第一区| 国产熟妇久久777777| 黄色日韩在线| 国产精品区一区| 国产日产一区二区三区| 9191久久久久久久久久久| 国产三级黄色片| 亚洲一区二区免费看| 久久久人人爽| 99爱在线视频| 日韩高清av一区二区三区| 日韩成人免费观看| 福利一区福利二区| 欧美一区二区中文字幕| 香蕉免费一区二区三区在线观看| 久久九九热免费视频| 国产手机精品视频| 亚洲欧洲在线观看av| 久久久久无码精品| 亚洲国产成人精品女人| 亚洲一区二区三| 国产在线高清视频| 欧美成人精品二区三区99精品| 国产一级生活片| 成人美女视频在线看| 国产男女无遮挡| 亚洲第一福利社区| 国产中文字幕日韩| 日本中文在线| 亚洲成年人在线播放| 99re这里只有精品在线| 国产拍揄自揄精品视频麻豆| 午夜免费一级片| 欧美日本三区| 天堂av一区二区| 欧美成人aaa| 91黑丝高跟在线| 国产免费永久在线观看| 8x8x8国产精品| 欧美国产成人精品一区二区三区| 久久免费国产精品| 日韩一区欧美小说| 男女猛烈激情xx00免费视频| 国产精品zjzjzj在线观看| 国产精品大片wwwwww| 日韩精品成人av| 日韩电影免费在线观看中文字幕| 中文字幕+乱码+中文字幕明步| 国产精品人妖ts系列视频| 在线免费看黄色片| 久久天堂精品| 妞干网视频在线观看| 综合伊思人在钱三区| 91香蕉国产在线观看| 蜜桃av.网站在线观看| 久久成人亚洲精品| 伊人色综合久久| 精品久久久久久无| 国产精品无码一区二区桃花视频 | 亚洲欧美另类综合| 一本色道综合亚洲| 久久精品久久国产| 国产精品欧美一区二区三区| 你懂得在线视频| 国产一区二区美女| 91精品999| 日韩精品成人一区二区在线| 欧美激情视频免费看| 99久久婷婷| 亚洲v国产v在线观看| 99a精品视频在线观看| 91在线播放国产| 深夜成人福利| 欧美一区二区三区…… | 手机av在线看| 中日韩av电影| 四虎地址8848| 国产三级精品视频| 国产黄色大片免费看| 97se亚洲国产综合自在线不卡| 污污内射在线观看一区二区少妇 | 欧美三级网址| 青青久久aⅴ北条麻妃| 懂色av一区| 茄子视频成人在线| 多野结衣av一区| 日韩av免费在线看| 日本不卡1234视频| 国产精品久久久久91| 日韩免费电影| 国产日韩专区在线| 999色成人| 国产精品我不卡| 国产伦精品一区二区三区免费优势| 久久精品ww人人做人人爽| 91综合精品国产丝袜长腿久久| 久久综合中文色婷婷| 色橹橹欧美在线观看视频高清| 青青草原成人| 成人综合一区|