Sharks are among the oldest animals on Earth. There are hundreds of kinds of sharks. Most are about two meters long. The dogfish shark, however, is less than twenty centimeters in length. A shark has an extremely good sense of smell. It can find small amounts of substances in water, such as blood, body liquids and chemicals produced by animals. 71 Sharks eat fish, other sharks, and plants that live in the ocean.
Sharks grow slowly. About forty percent of all sharks lay eggs. 72 Some sharks carry their young inside their bodies as humans do. Some sharks are not able to reproduce until they are twenty years old．Most reproduce only every two years. And they give birth to fewer than ten young sharks. For this reason, over-fishing of sharks is of special danger to the future of the animal.
Sharks are important for the world’s oceans. They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in ocean waters do not become too great. 73.
People hunt sharks for sport, food, medicine and their skin. Experts say the international market for some kinds of sharks has increased because many parts of a shark are valuable.
Collectors pay thousands of dollars for the jaws of a shark. 74 The skin of a shark can be used like leather.
In Asia, people enjoy a kind of soup made from shark fins. Experts say a fisherman can earn a lot of money for even one kilogram of shark fins. Sharks are among the oldest animals on Earth, but some sharks are in danger of disappearing from Earth.75.

A．Shark liver oil is a popular source of Vitamin A
B．This protects the plants and other forms of life that exist in the oceans
C．Sharks are valuable to us and we can make full use of them
D．These powerful senses help sharks find their food
E．If too many sharks in one area are killed, that group of sharks may never return to normal population levels
F． his is a threat to other forms of life in the ocean.
G．The others give birth to live young


【小題1】D
【小題2】G
【小題3】B
【小題4】A
【小題5】E

解析

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源： 題型：閱讀理解

As dangerous as sharks may have seed to people after watching Jaws, which was released on June 20,1975, the recent disastrous decrease in their numbers show that people have proven far more dangerous to sharks.

    This disastrous decline is due in large part to commercial fishing of sharks. “The market for

shark fins（魚翅）in East Asia opened up thanks to changes in their economy, increasing their

ability to spend money on things such as shark fin soup,” Burgess said.

However, the biggest worry for sharks and their relatives, the skates and rays, which are suffering a similar fate, “is how they are killed incidentally when fishermen try and take other fish—the problem of bycatch（漁業(yè)混獲）,” Burgess explained. “They may be thrown back afterward, but they’re still dead.”

The key of the problems behind bringing sharks back is that “they’re not the same as other fish,” Burgess said, “Sharks are slow growing and slow to reach maturity. Sharks are live bearers, which means females keep their young in their body just like us, but instead of nine months, it takes 12 to 18 months or more in sharks. Also, sharks generally can’t give birth again until a year after they’ve given birth—sometimes they’re on a three-year cycle. So once you get a shark population knocked down, this ‘life in the slow lane’ means that recovery is measured in decades rather than years.”\

Burgess said, “I’m on the recovery team for it, but the recovery plan for that is over the course of 100 years. So I won’t see them recover, nor will you, nor will your children. That’s what it means when these animals go down—they’re down a long time.”

Any measures aimed at saving sharks must not only consider byeatch, “which is the real killer right now,” but also encourage interactional cooperation, Burgess said.

“Sharks are very migratory, and many species cross borders,” he said. “We can protect them only by getting many govemment to come aboard. That’s the hardest part about this.”

The text mainly tells us       .

       A．shark fins are valuable    B．sharks are dangerous

       C．bycatch brings bad effects       D．sharks are in danger

The number of sharks is decreasing mostly because of      .

       A．the film Jaws          B．commercial interests

       C．changes in economy D．shark fin soup

Bringing sharks back is difficult because      .

       A．they’re like the other fish      

       B．their reproductive rate is slow

       C．they can’t give birth again     

       D．their life cycle is only 3 years

What can be concluded from the last paragraph?

       A．Sharks live the way human beings do.

       B．It’s time many govemments cooperate.

       C．Sharks’ migration takes a very long time.

       D．Bycatch shouldn’t be forbidden by intemational laws.

The test is most probably a        .

       A．newspaper ad          B．book review

       C．science news report  D．science fiction story

查看答案和解析>>

科目：高中英語 來源：2012-2013學(xué)年廣東省汕頭市金山中學(xué)高二下學(xué)期期中英語試卷（帶解析） 題型：閱讀理解

Sharks have lived in the oceans for over 450 million years, long before dinosaurs appeared. There are now about 360 species of sharks, whose size, behavior, and other characteristics differ widely.
Every year, we catch and kill over 100 million sharks, mostly for food and for their fins. Dried shark fins are used to make shark fin soup, which sells for as much as $50 a bowl in fine Hong Kong restaurants. Other sharks are killed for sport and out of fear. Sharks are vulnerable(易受傷的) to overfishing because it takes most species 10 to 15 years to begin reproducing and they produce only a few offspring（后代）.
Influenced by movies and popular novels, most people see sharks as people-eating monsters. This is far from the truth. Every year, a few types of shark injure about 100 people worldwide and kill about 25. Most attacks are by great white sharks, which often feed on sea lions and other marine（海洋的） mammals. They sometimes mistake human swimmers for their normal prey, especially if they are wearing black wet suits.
If you are a typical ocean-goer, your chances of being killed by an unprovoked（非受挑釁而發(fā)生的）attack by a shark are about 1 in 100 million. You are more likely to be killed by a pig than a shark and thousands of times more likely to get killed when you drive a car.
Sharks help save human lives. In addition to providing people with food, they are helping us learn how to fight cancer, bacteria, and viruses. Sharks are very healthy and have aging processes similar to ours. Their highly effective immune system allows wounds to heal quickly without becoming infected, and their blood is being studied in connection with AIDS research.
Sharks are among the few animals in the world that almost never get cancer and eye cataracts（白內(nèi)障）. Understanding why can help us improve human health. Chemicals taken from shark cartilage（軟骨）have killed cancerous tumors in laboratory animals, research that someday could help prolong your life.
Sharks are needed in the world’s ocean ecosystems. Although they don’t need us, we need them. We are much more dangerous to sharks than they are to us. For every shark that bites a person, we kill one million sharks.
【小題1】Which of the following is NOT a reason why people kill sharks?

A．People kill sharks for food.
B．People kill sharks for sport.
C．People kill sharks out of fear.
D．People kill sharks because they often attack swimmers.
【小題2】According to the passage, which of the following statements is NOT true?
A．There are many different species of sharks, but only a few of them are dangerous to humans.
B．Sharks never get ill.
C．Sharks are a valuable resource for human.
D．Sharks play an important role in the ocean ecosystem.
【小題3】It can be inferred from the passage that _______.
A．movies have given people the wrong impression of sharks
B．most sharks are dangerous to humans
C．sharks will attack anyone who is wearing black
D．it is dangerous to swim in the ocean
【小題4】The underlined word “prolong” in the last but one paragraph means ______.
A．saveB．protectC．lengthenD．improve
【小題5】The best title for the passage would be _______.
A．Are Sharks Dangerous?B．Sharks And Humans
C．Sharks: Humans’ FriendsD．Sharks Help Save Human Lives

查看答案和解析>>

科目：高中英語 來源：2013屆廣東省廣寧縣廣寧中學(xué)高三上學(xué)期期中考試英語試卷（帶解析） 題型：閱讀理解

Some Chinese new - rich like eating shark fin soup because they think it shows their class. However, for the Chinese NBA idol Yao Ming, doing so is unacceptable as the practice has led to the overfishing of sharks.
When Yao and his wife Ye Li got married in 2007, they publicly announced that they would not allow shark fin soup to be served at their wedding banquet.
Actually, Yao had been saying no to shark fins since 2006, when he was appointed as the Goodwill Ambassador for wild life protection.
Now, the 226 - cm big guy is resorting to his personal influence to encourage more to say no to eating the soup and to raise awareness of protecting animals. “Sharks are friends of human beings. They are not our food,” Yao said.
Other celebrity athletes like Olympic champions. Li Ning and Kong Linghui are following on the heels of Yao, throwing themselves into serving the public as Goodwill Ambassadors for wild animal rescue. Recent reports about Yao’s retirement have saddened tens of thousands of basketball fans both at home and abroad. Yet Yao's influence goes far beyond the basketball courts.
Yao has engaged himself in charity and public welfare services for quite a while. When the devastating 8.0 －magnitude earthquake hit Wenchuan in southwest China in 2008 , Yao donated 2 million yuan. “When I was a little boy, my parents and teachers told me to help others and to be a good man,” Yao recalled. “But I could nor donate then because I had not much pocket money. After I moved to Houston, I got involved in quite a number of community service activities and I felt a strong sense of achievement when I got people together,”Yao said.
Like Yao, newly crowned French Open champion Li Na has showed her willingness to donate. Li gave 480,000 yuan of her prize money from the open, plus 20,000 yuan from her own pocket, to a local nursing home in her hometown. Another Chinese sports icon, hurdler Liu Xiang, has also been actively involved in charity for years.
【小題1】The reason why some Chinese new-rich like eating shark fin soup is that they think            ．

A．it is very deliciousB．it is very cheap and healthy
C．it is very popular in societyD．it can show their status
【小題2】Yao Ming is against eating shark fin soup because              ．
A．too many sharks are killedB．he dislikes eating sharp fin
C．it is too expensiveD．sharks are dangerous animals
【小題3】Which of the following statements is NOT TRUE?
A．Li Na donated 500,000 yuan to a local nursing home in her hometown．
B．Yao Ming donated 2 million yuan after the earthquake of Wenchuan．
C．Yao Ming has encouraged more people to stop eating shark fin soup and protect animals．
D．Yao Ming was appointed as the Goodwill Ambassador for protecting wild life in 2007．
【小題4】What words can be used to describe Yao Ming according to the passage?
A．Rich and generous．B．Influential and warmhearted．
C．Energetic and optimistic．D．Popular and confident．
【小題5】From the passage , we can learn that               。
A．most athletes don't like eating shark fin soup
B．Yao Ming has been donating money to charity since he was a child
C．Yao Ming has an influence on not only the basketball courts but also charity and public welfare services
D．Yao Ming has taken part in many community service activities when he was in China

查看答案和解析>>

科目：高中英語 來源：2014屆福建三明泰寧一中高二下學(xué)期第一次階段考試英語試卷（解析版） 題型：閱讀理解

Ralph and Norton can grow to be 40 feet long and live in a tank as large as a football field.What are they? They’re the only two whale sharks at a North American aquarium .

You can see Ralph and Norton at the world’s largest aquarium, the new Georgia Aquarium in Atlanta.

The aquarium’s giant tanks hold eight million gallons of water and will be home to about 100,000 fish!

The aquarium was designed to look like a giant ship breaking through the waves.It has 60 different habitats from the sea and five galleries (展館), each with a different theme.About 2.4 million visitors are expected to come each year.“We want to be the world’s most engaging aquarium.” Said Jeff Swanagan, the aquarium’s executive director.

Ralph and Norton arrived in June, 2005 from Taiwan.They were only 15 and 13 feet long, but they may grow to be more than 40 feet long! Whale sharks are the world’s largest fish.Three full-time vets will work there to make sure that Ralph, Norton, and all of the aquarium’s sea life stay healthy.Students from the University of Georgia will help run the aquarium and conduct research at the animal hospital.

The aquarium was paid for almost completely by a $ 200 million gift from Bemie Marcus, co-founder of Home Depot Inc, and his wife, Billi.“It’s going to be the most unique aquarium in the world,” said Marcus.Marcus said the aquarium was a “thank you” note to the city of Atlanta and the State of Georgia, where the Home Depot first opened for business.

1.According to this passage, Ralph and Norton are ______.

A．polar bears        B．penguins          C．whale sharks       D．dolphins

2.The world’s largest aquarium is located in ____.

A．Los Angeles        B．Atlanta            C．New York          D．Miami

3.Which of the following is TRUE?

A．Marcus helped to build the aquarium to show his thanks to Atlanta.

B．The aquarium’s giant tanks can hold eighteen million gallons of water.

C．Ralph and Norton arrived in June, 2005 from Japan.

D．The aquarium was designed to look like a giant shark.

4.By saying “We want to be the world’s most engaging aquarium” Jeff Swanagan means ___.

A．the aquarium will be the largest habitat for sea life

B．the aquarium will be home to very special sea animals

C．the aquarium will be rebuilt and will be made even larger

D．the aquarium will attract a large number of visitors

 

查看答案和解析>>

科目：高中英語 來源：2010-2011學(xué)年湖北省黃岡市3月份高三質(zhì)量檢測英語卷 題型：閱讀理解

  Dolphins and sharks are showing up in surprisingly shallow water just off the Florida coast．Mullets，crabs，rays and small fish gather by the thousands off an Alabama pier．Birds covered in oil are crawling（爬）deep into marshes（沼澤），never to be seen again．

    Marine scientists studying the effects of the BP disaster（英國石油公司漏油事件）are seeing some strange phenomena．Fish and other wildlife seem to be fleeing the oil out in the Gulf and gathering in cleaner waters along the coast in a trend that some researchers see as a potentially troubling sign．The animals.presence close to shore means their usual habitat is badly polluted，and the crowding could result in mass die-offs as fish run out of oxygen．Also，the animals could easily be captured by their enemies．

    The nearly two-month-old spill（漏油）has created an environmental disaster in US history as tens of millions of gallons have flown into the Gulf of Mexico ecosystem．Scienfists are seeing some unusual things as they try to understand the effects on thousands of species of marine life．For nearly four hours Monday，a three-person crew with Greenpeace cruised（巡航）past delicate islands and mangrove-dotted inlets in Barataria Bay off southern Louisiana．They saw dolphins by the dozen frolicking（嬉戲）in the oily sheen（光澤）and oil-tinged pelicans feeding their young．But they spotted no dead animals．

    “I think part of the reason why we’re not seeing more yet is that the impacts of this crisis are really just beginning，”Greenpeace marine biologist John Hocevar said．

    The counting of dead wildlife in the Gulf is more than an academic exercise；the deaths will help determine how much BP pays in damages．

1.What do the marine life react to the BP disaster？

    A．Dolphins and sharks show up in deep water．

    B．Tens of thousands of marine animals are found dead．

    C．Sea creatures flee from oil spill，gathering near seashore．

    D．Birds crawl（爬）deep into caves．

2.The environmental disaster was caused by        ．

    A．the lack of environmental sense of BP

    B．the nearly two-mouth-old oil spill

    C．the crowding marine life

    D．the damage of Mexico Gulf ecosystem

3.What is John Hocevar’s attitude towards the disaster？

    A．Disappointed  B．Depressed      C．Neutral        D．Worried 

4.From the passage，we can infer that          ．

    A．marine scientists have seen some strange phenomena．

    B．the disaster has little influence on dolphins．

    C．a(chǎn) three-person crew reached no conclusion．

    D．BP will pay much money according to the number of dead wildlife there．

 

查看答案和解析>>

同步練習(xí)冊答案