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(guān)習題

科目：高中英語 來源：不詳 題型：完形填空


第二節(jié) 完形填空（共20小題；每小題1．5分，滿分30分）
閱讀下面短文，掌握其大意，然后從36～55各題所給的四個選項（A、B、C和D）中，選出可以填入空白處的最佳選項，并在答題卡上將該項涂黑。
A businesswoman got into a taxi in midtown. As it was the rush hour and she was in a   36__   to catch a train, she   37   a quick way to reach it. “I have been a taxi driver for 15 years!” the driver said   38   . “You don’t think I know the best way to go?”
The woman tried to explain that she hadn’t   39  to annoy him, but the driver kept   40  . She finally realized that he was too annoyed to be  41  , so she changed her  42 . “You know, you are right,” she told him. “It must seem   43  for me not to think you know the best way  __44   the city.”
45   , the driver glanced at his   46   in the rearview mirror, turned down the street she wanted and got her to the train on time. “He didn’t say another word the rest of the ride,” she said, “  47   I got out and paid him. Then he thanked me.”
When you find yourself   48   with people like the taxi driver, you will always try to   __49_   your idea. It can lead to longer arguments, lose job chances or   50   marriages. I have discovered one simple   51   extremely unlikely method that can prevent the disagreement or other difficult situations from   52   in a disaster.
The   53   is to put yourself in the other person’s shoes and look for the  54  in what that person is saying. Find a way to   55  , and the result may surprise you.
36. A. hurry       B. rush       C. moment     D. way
37. A. chose       B. made     C. found     D. suggested
38. A. jokingly          B. angrily          C. anxiously   D. curiously
39. A. supposed      B. expected     C. meant     D. decided
40. A. apologizing  B. driving     C. asking     D. shouting
41. A. reasonable  B. thoughtful  C. normal          D. practical
42. A. road        B. mind      C. direction    D. manner
43. A. strange     B. wrong     C. terrible          D. stupid
44. A. across      B. in               C. through    D. along
45. A. Surprised     B. Worried     C. Annoyed    D. Disappointed
46. A. rider        B. speaker      C. helper     D. comer
47. A. until        B. after      C. because      D. since
48. A. satisfied          B. concerned   C. crowded     D. faced
49. A. give up     B. turn down  C. stick to          D. point out                 
50. A. combine      B. destroy       C. suffer     D. divide
51. A. and         B. that        C. but        D. though
52. A. lying       B. resulting     C. setting     D. leading
53. A. problem          B. importance C. key        D. reply
54. A. fact         B. meaning     C. expression  D. truth
55. A. agree       B. argue     C. explain       D. escape

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空

      完形填空（共20小題，每小題1.5分，滿分30分）
Picture this situation. It is late afternoon and you are    36   . You have an important dinner engagement that evening so you    37    to take an hour nap. Instead of setting your alarm you ask a friend who is visiting to wake you in an hour. He   38   .
Two hours later, your friend wakes you. You ask, “Why didn’t you wake me after one hour?” He    39    that he thought you asked him to wake you in two hours and that is what he said. You then have to run around and get ready    40  , muttering to yourself about how you    41   have set the alarm rather than asking your friend to wake you. Had you done that, you would not have been so    42    to get ready.
Your conclusion is correct. Your    43   of what happened looked at the system you used. Your friend’s   44   to wake you resulted from a miscommunication.   45   he didn’t hear you correctly or you misspoke.
46   at the situation from the point of view of being personally responsible is always better than blaming yourself or another. So how do you best be “responsible” in this situation? The answer is   47   in systems thinking.
Dr. W. Edward Deming is the American statistician who is credited with   48   the quality practices to Japan.   49   his arrival in that country in 1950, the label “made in Japan” was synonymous with inferior(劣等的) quality. Now the same “made in Japan” label is synonymous(等同) with   50   quality.
So what did Dr. Deming teach the Japanese that made such a  51   to the quality of their products? The answer is quite simple, yet profound.   52   on years of statistical analysis, Deming was able to validate(證明) that 94 % of all failures are not because people don’t want to do a good job. The fact is that   53   people want to do a good job.
What, then, is the   54   if it’s not the people?
It’s the system. The system failed in 94% of the    55   , not the people.
36. A. relaxed          B. puzzled            C. concerned          D. tired
37. A. try              B. decide             C. promise            D. expect
38. A. agrees        B. admits                C. accepts            D. adopts
39. A. wonders        B. doubts             C. replies             D. requests
40. A. carelessly         B. quickly            C. angrily            D. suddenly
41. A. should          B. could              C. might             D. would
42. A. slow           B. rushed              C. uncertain           D. satisfied
43. A. understanding B. presentation       C. description          D. analysis
44. A. forgetfulness B. unwillingness      C. failure             D. fault
45. A. Either        B. Neither              C. Both                D. Whether
46. A. Glaring        B. Staring            C. Glancing           D. Looking
47. A. left              B. found             C. received           D. completed
48. A. bringing        B. turning            C. fetching            D. leading
49. A. Until          B. After              C. Before             D. Since
50. A. different     B. poor            C. best               D. high
51. A. difference    B. destruction       C. decoration        D. distinction
52. A. Based        B. Relied                 C. Focused            D. Counted
53. A. few            B. fewer             C. more              D. most
54. A. reason       B. cause                 C. effect              D. result
55. A. incidents     B. accidents              C. cases               D. actions

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

When you are little, it’s not hard to believe you can changed the world. I remember my enthusiasm when, at the age of 12, I addressed the people at the Rio Earth Summit. “I am only a child,” I told them. "Yet I know that if all the money spent on war was spent on ending poverty and finding environmental answers, what a wonderful place this would be. In school you teach us not to fight with others, to work things out, to respect others, to clean up our mess, not to hurt other creatures, to share, not be greedy. Then why do you go out and do the things you tell us not to do? You grownups say you love us, but I challenge you, please, to make your actions reflect your words."
I spoke for six minutes and received a standing ovation. Some of the delegates even cried. I thought that maybe I had reached some of them, that my speech might actually spur（刺激） action. Now, a decade from Rio, after I've sat through many more conferences, I'm not sure what has been accomplished. My confidence in the people in power and in the power of an individual's voice to reach them has been deeply shaken.
When I was little, the world was simple. But as a young adult, I'm learning that as we have to make choices--education, career, lifestyle--life gets more and more complicated. We are beginning to feel pressure to produce and be successful. We are learning a shortsighted way of looking at the future, focusing on four-year government terms and quarterly business reports. We are taught that economic growth is progress, but we aren't taught how to pursue a happy, healthy or sustainable way of living. And we are learning that what we wanted for our future when we were 12 was idealistic and naïve（天真）.
Today I'm no longer a child, but I'm worried about what kind of environment my children will grow up in. I know change is possible, because I am changing, still figuring out what I think. I am still deciding how to live my life. The challenges are great, but if we accept individual responsibility and make choices, we will rise to the challenges, and we will become part of the positive tide of the change. I hope this goal will be met through our common efforts. Thank you all.
57．The purpose of what the speaker said at the age of 12 was to          .
A．end poverty and make school beautiful
B．find environmental answers and show off
C．focus people’s attention on some social problems
D．find a wonderful place and clean it up
58．What does the underlined word “ovation” in the second paragraph refer to?
A．A long period of laughing.
B．A cold and unfriendly welcome.
C．An expression used for greeting.
D．Great applause or cheering.
59．The information in the text is presented mainly through          .
A．question and answer         B．a(chǎn) personal lecture
C．cause and effect                  D．listing steps in a process
60．Which of the following best describes the speaker?
A．He is an experienced educator.         B．He is an impolite man.
C．He is a man of great worries.   D．He is a man of social responsibility.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


B
Piercings（穿洞）have moved up on the trend list in recent Tattoos（紋身）and body years. Around Western schools lots of teens are sporting new holes and flesh ink. Like all other subjects, we’ll surely be faced with such situation. To get a better view of what has happened in the West, let’s sit down and hear what they say.
Kerstin Otto from Washington:
The hotter it gets and the more layers of clothing disappear, the more tattoos and piercings appear on various places of the human body, I wouldn’t be caught dead with a snake tattooed on my ankle or with a piece of metal stuck in my belly button.
Tiara from Indiana:
I personally think body piercing is sickening. If there were supposed to be holes in your body, you would have been born with them. I do, however, think that ear piercing, is not wrong.  There is a difference between ear piercing and belly button piercing. Ear piercing is not nearly as dangerous. I would be sick if someone stuck a needle in my belly button.
Lee from Illinois:
Hi! I live in Illinois. I am 23. I have 12 tattoos and three piercings. I love my tattoos
and consider myself an art collector. You would be surprised at who has given me the thumbs-up on my art work. People on the street stop me to look at that on my leg. Most of them don’t know what it is. They just think the work itself is great.
Nagib from Washington:
I wanted an earring. My friends had them and it looked like a cool thing. I wanted to get a nose ring, but my mum wouldn’t let me. Now I’m glad I didn’t get it. I just wanted a little stud, but I wouldn’t have looked good with it.
Jackson from Ohio:
I don’t think it’s wrong, but when people do it all over the place like their face and everything —I think that’s ridiculous. People who get the big dragons that cover your whole body—I don’t think that’s necessary. When I see naked chicks on guys, I think. “You have no respect for women.”
Brittney from New York:
You don’t want to do stuff to your body. You don t need to do that because you were made perfect. You don’t need to add piercings. If it will make you feel beautiful and you really feel like you need to do it for yourself, then okay. If it really makes a big difference impacting your self-esteem and how you are towards others, then do it. But otherwise, don’t mess with what you got. Maybe you should try something more substantial（充實的）to find beauty in yourself.
60. Who is wholeheartedly lost in tattoos and piercing?
A. Tiara           B. Kerstin           C. Nagib.           D. Lee.
61. Who doesn’t think tattoos and piercing are beautiful?
A. Jackson.          B. Brittney.           C. Tiara.           D. Nagib.
62. We can conclude that ________.
A. tattoos and piercing are a new kind of elegant art
B. all the teachers in the West are in favor of tattoos and piercing
C. everything is changeable with time going on
D. it is necessary to live with all different views of beauty
63. The best title for this passage is probably _________.
A. Body Art or Damage                    B. Damage to the Youth’s Body
C. Young People’s Different Curiosities       D. A Great Anxiety About Young People

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空

完形填空（共20小題；每小題1分，滿分20分）
請認真閱讀下面短文，從短文后各題所給的A、B、C、D四個選項中，選出最佳選項，并在答題卡上將該項涂黑。
There are going to be moments in life when you must make very important decisions. You will find many people  36  to offer you advice if you ask for it (and even if you don’t), but always remember that the life you  37  is yours and nobody else’s. It’s important to decide for yourself what’s important to you and what you want before you   38   others. Because while there will be times  39  outside advice proves wise, there will be at least as many times when it proves completely  40 . The only way to really evaluate other folks’ advice is to first learn everything that you can about whatever challenge you are  41 . Once you’ve done that, in most cases you should be able to make a wise decision  42   anyway.
You were   43   with the ability to decide what is and what isn’t in your best interest. Most of the time, you will make the right decision and  44  the appropriate actions, and in thinking for yourself, you will become far more successful than if you had gone
against your own   45  .
Early on in my investment career, I made the mistake of  46  a few important business decisions on colleagues’ opinions instead of conducting the   47   necessary to make a wise decision. It wasn’t due to   48   on my part; no one could ever accuse me of that. But, being   49  to Wall Street, I intended to assume that my more senior  50  knew more than I did, and so I  51  too much significance to their opinions.
You know what happened? Each of those investments ended in  52  . Eventually I stopped allowing myself to be influenced by  53  and began doing the work myself and making my own decisions. It took me until I was almost 30 years old to  54   this—it’s never too late for a person to change his approach both to   55  and to life. 
36. A. easy                                   B. ready                               C. unwilling                         D. hard
37. A. lead                                    B. lend                                  C. take                                 D. earn
38. A. look at                      B. pick up                   C. turn to                   D. learn from
39. A. that                                    B. since                                C. when                               D. while
40. A. useless                     B. useful                              C. priceless                         D. clever
41. A. getting                     B. making                            C. suffering                         D. facing
42. A. on one hand            B. on your own                   C. on the whole                 D. on all sides
43. A. born                                   B. tired                                 C. satisfied                          D. covered
44. A. enjoy                                  B. step                                 C. plan                                  D. take
45. A. assumption                      B. judgment                        C. condition                        D. fortune
46. A. basing                                B. depending                      C. relying                    D. focusing
47. A. research                           B. search                    C. resources                       D. activity
48. A. poverty                    B. laziness                           C. fear                                  D. diligence
49. A. used                                   B. accustomed                   C. new                                  D. old
50. A. students                           B. brothers                         C. colleagues                      D. classmates
51. A. owed                                  B. paid                                  C. gave                                 D. held
52. A. disaster                   B. progress                         C. failure                    D. success
53. A. either                                 B. another                           C. each                                 D. others
54. A. think                                   B. remember                      C. realize                             D. recall
55. A. payment                           B. dreams                           C. happiness                       D. business

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


B
Canadian scientists have found that the more emotional or mental challenges a person faces in a day, the less determined they become to work out physically.
However, the findings should not stop us from keeping fit. Experts believe that willpower (意志力)is like a muscle ， and needs to be exercised to help one avoid the temptation (誘惑)spending a night on the couch instead.
Kathleen Martin 一 Ginis, a professor of kinesiology 一 the science of movement 一 who led the study, says everyone has a limited amount of willpower, and that it will be reduced by stress. Miss Martin 一 Ginis, of Canada' s McMaster University, explains, "Cognitive (認知的)tasks, as well as tasks such as regulating (調(diào)整)one' s emotions, can reduce one' s capacity to force oneself to exercise."
Her team of scientists performed a so — called " Stroop" test on volunteers to reach their conclusions. The experiment involved showing participants words associated with colors but printed in different colors - for example ， the word " blue " written in red ink . ' Participants were divided into two groups. One group was asked to name the color of the ink ， instead to say the printed word ， while the other wasn't Martin ― Ginis says ， " After we used this cognitive task to use up their self 一 regulatory capacity, the participants didn't exercise as hard as those who had not performed the task. ，， The more people concentrated on the cognitive task ， the more likely they were to skip exer­cise sessions (活動時間)over the next eight week. You only have so much willpower .
However, there are ways to strengthen willpower. The study found the listening to music before going to the gym can help, as well as making a commitment to work out with friends. It also concluded that willpower can be stretched by constantly cake ， or forcing oneself to study an extra hour each night.
Martin - Ginis adds, "There are strategies people can use to help revitalize (使恢復(fù)活動) themselves after they’ve used up their self 一 regulation. Willpower is like a muscle ： it needs to be used to stay strong.
61.According to the experts, human willpower    .
A.can be exercised through muscle movement
B.can regulate itself to resist temptations
C.is weakened by stressful cognitive or emotional tasks
D.is reduced by lack of physical exercise.
62.We learn from Paragraph 4 that the experiment      .
A.made use of the Stroop test
B.asked one group of participants to name the words
C.required researchers to write the word "blue" in red ink to make it easily recognizable.
D.showed that those who hadn't performed the task were smarter than those who had
63.All the following are ways to strengthen one's willpower EXCEPT________
A.listening to music before doing exercise
B.promising to work out with friends
C.training oneself repeatedly to resist temptations
D.forcing oneself to do the same thing each day
64.Which of the following is in agreement with Miss Martin ― Ginis' idea?
A.Human's willpower is limited to a certain level
B.The cognitive tasks could make people ignore exercise
C.Challenging tasks could make people ignore exercise
D.Exercise is an important way to strengthen one's willpower.
65.What can we infer from the passage?
A.Willpower can be challenged to become powerful.
B.McMaster University is famous for its kinesiology.
C.Effective ways to resist temptations have been found.
D.the study has an impact on the science of movement.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


C
Sitting in a dark movie theater with your friends. and a tub of popcorn (H^) sounds like a perfect way to spend a Saturday night, and it could be, if you are willing to share your popcorn with the entire row of moviegoers around you.
A review of movie-theater popcorn reveals an alarming amount of fat, salt and calories in even the smallest sizes. A large tub of popcorn at Regal Cinemas, for example, holds 20 cups of popcorn and has 1,200 calories, 980 milligrams of sodium (鈉) and 60 grams of saturated (飽和的) fat. Adding just a tablespoon of butter adds 130 calories. And do not forget that it comes with free refills.
Not so hungry? The medium size popcorn, even the small, at 11 cups, delivers 670 calories, 550 milligrams of sodium .and 24 grams of saturated fat. The findings may surprise those who believe it is a relatively healthy snack. In fact, plain air-popped popcorn is low in calories and free of saturated fat. Movie theater popcorn, however, is popped in oil, often coconut oil, which is 90 percent saturated fat. Add salt to it, and your once-healthy snack turns into a health offender.
One way to make your popcorn healthier? Ask the theater to pop the corn without salt. The best way to make your movie snack healthier, however, would be to skip the popcorn.
"You could share a tub of popcorn with 10 friends," Dr. Nestle, a professor of nutrition at New York University, said. "Or, what a concept, watch the movie without eating anything."
64. The review finds that movie theatre popcorn may contain all the following EXCEPT ______.
A. butter           B. sodium                 C. saturated fat         D. pepper
65. What does the author think of popcorn prepared in coconut oil?
A. It is a healthy snack.                        B. It does harm to our health.               C. It looks like a perfect choice.                 D. It is very nutritious.
66. Which kind of popcorn causes the least health concern?
A. Movie theatre popcorn.                                 B. Popcorn sold at Regal Cinemas.          C. Large size popcorn.                                      D. Plain air-popped popcorn.
67. What is Dr. Nestle's suggestion to moviegoers?
A. Avoid eating popcorn.                                  B. Share popcorn with friends.              C. Not eating anything in the movie theatre.          D. Try eating other kind of food.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


E
The “Monday morning feeling” could be a crushing pain in the chest which leaves y
ou sweating and gasping for breath. Recent research from Germany and Italy shows that heart attacks are more common on Monday mornings and doctors blame the stress of returning to work after the weekend break.
　The risk of having a heart attack on any given day should be one in seven, but a six-year study helped by researchers at the Free University of Berlin of more than 2600 Germans showed that the average person had a 20 percent high chance of having a heart attack on a Monday than on any other day.
　 Working Germans are particularly not protected against attack, with a 33 percent higher risk at the beginning of the working week. Non-workers, by comparison, appear to be no more at risk on a Monday than any other day.
　A study of 11000 Italians proved 8 a.m. on a Monday morning as the most stressful time for the heart, and both studies showed that Sunday is the least stressful day, with fewer heart attacks in both countries.
　The findings could lead to a better understanding of what is the immediate cause of heart attacks, according to Dr Stefan Willich of the Free University. “We know a lot about long-term risk factors such as smoking and cholesterol (膽固醇) but we don’t know what actually causes heart attacks, so we can’t give clear advice on how to prevent them,” he said.
　Monday mornings have a double helping of stress for the working body as it makes rapid change from sleep to activity, and from the relaxing weekend to the pressures of work.
　“When people get up, their blood pressure and heart rate go up and there are hormonal (內(nèi)分泌) changes in their bodies,” Willich explained. “ All these things can have an unfavorable effect in the blood system and increase the risk of a clot (血凝塊) in the arteries (動脈) which will cause a heart attack.
　 “When people return to work after a weekend off, the pace of their life changes. They have a higher workload, more stress, more anger and more physical activity,” said Willich.
72．Monday morning feeling, as this passage shows, _________.
A．is not so serious as people thought
B．is harmful to working people in developed countries
C．is the first killer in Germany and Italy
D．is created by researchers in Germany and Italy
73．To protect people from heat attacking, doctors have paid much attention to __________-.
A．people’s working time      B．people’s living place
C．people’s diet and life style   D．people’s nationalities
74．It can be learned from the passage that heart attack has nothing to do with __________.
A．blood pressure     B．heart rate      C．hormonal changes     D．blood group
75．If the researchers give us some advice to avoid Monday morning feeling, what might it be?
A．Stop working on Monday 　　　       B．Create a pleasant working environment
C．Get up late on Monday morning　 D．Do to work with a doctor

查看答案和解析>>

同步練習冊答案