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Fish are animals that live in water. They live in almost any place【11】there is water. Some
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Which of the following statements can best be inferred from the passage?
A. Fishes only "speak" to communicate with each other.
B. Researches are now being made to study the significance of fish sounds.
C. Sea animals have a sharper hearing ability than men.
D. Sounds made by fish cannot be transmitted through the air.
Fish sounds are important to man, also. By listening to them, he can learn a great deal about the habits of creatures that make them, the size of the School they form, the patterns of their migrations, and the nature of the environments in which they live. He can also apply this information to the more effective utilization of the listening spots he has set up to detect enemy submarines (潜水艇). A knowledge of fish sounds can avoid confusion and unneeded effort when a "new" sound is picked up and the sound sentry (哨兵) must decide whether or not to call an alarm.
Among the people who know that many sea animals have voices, few ______.
A.know the meaning of their conversations
B.realize that they can communicate with each other
C.realize that they can make speeches
D.could understand their conversations
根据下面内容,回答题:
Scientists in the UK have announced that the piranhafish"s reputation 21 a fearsome 22 may well not be deserved. The fish, which is found in the Amazon in Brazil, have been 23 as deadly carnivores(食肉动物 ) that work in shoals to overwhelm their prey and strip it of its flesh in seconds.
However, experts 24 St Andrews University say that piranhas are omnivores(杂食动物) that mainly eat fish, plants and insects. They form. big groups not to hunt but to defend 25 against other predators, according to the team.
"Previously it was thought piranhas shoaled as it 26 them to form. a cooperative hunting group," said Professor Anne Magurran. " 27, we have found that it is primarily a defensive behavior. "
Piranhas can be attacked by animals 28 dolphins, caimans and large fish, so forming a shoal is a good way of 29 being killed. Piranhas of 30 age stay in the middle of the group for 31 and the 32 of the shoal differs according to the level of 33 When the water level is 34, the fish form. small groups as there is space to escape, but when the water level drops, they form. large groups as protection 35 predators.
材料题请点击右侧查看材料问题 查看材料
A.as
B.as if
C.as though
D.since
完成下列各题 The people who lives in the far North are called Eskimos(爱斯基摩人).In the world of ice and snow it is 21 to grow plants for food.The Eskimos must hunt and fish during the whole year to 22 themselves and their families with food.In winter,they hunt the seal(海豹) 23 the polar(极地的)bear.When they hunt the seal,they 24 a hole in the ice and try to 25 the seal when it comes up to breathe. In summer,the Eskimos hunt 26 animals。and they also hunt birds and catch fish. 27 that is useful is saved.The Eskimos use the meat from animals for food.They melt(融化)the fat from their bodies and use the 28 as fuel(燃料).They make tools out of animals bones.The skin and furs of animals are used for making clothing. If an Eskimo is 29 lucky,he may kill a whale(鲸鱼), 30 a dead whale may wash up on the shore near his house.The whale is an especially useful animal,because it gives a great 31 of oil. There is 32 wood at all where the Eskimos live.Eskimos 33 all their wood from the sea.Sometimes floating wood from places.farther south washes up on the shore. Most Eskimo houses are 34 of stones.Instead of a door,there is a long,low tunnel (地道) 35 into the house.People have to crawl(爬)through the tunnel in order to enter the house.
A.important
B.impossible
C.impolite
D.interesting
完成下列各题 The people who lives in the far North are called Eskimos(爱斯基摩人).In the world of ice and snow it is 21 to grow plants for food.The Eskimos must hunt and fish during the whole year to 22 themselves and their families with food.In winter,they hunt the seal(海豹) 23 the polar(极地的)bear.When they hunt the seal,they 24 a hole in the ice and try to 25 the seal when it comes up to breathe. In summer,the Eskimos hunt 26 animals。and they also hunt birds and catch fish. 27 that is useful is saved.The Eskimos use the meat from animals for food.They melt(融化)the fat from their bodies and use the 28 as fuel(燃料).They make tools out of animals bones.The skin and furs of animals are used for making clothing. If an Eskimo is 29 lucky,he may kill a whale(鲸鱼), 30 a dead whale may wash up on the shore near his house.The whale is an especially useful animal,because it gives a great 31 of oil. There is 32 wood at all where the Eskimos live.Eskimos 33 all their wood from the sea.Sometimes floating wood from places.farther south washes up on the shore. Most Eskimo houses are 34 of stones.Instead of a door,there is a long,low tunnel (地道) 35 into the house.People have to crawl(爬)through the tunnel in order to enter the house.
A.important
B.impossible
C.impolite
D.interesting
??The people who lives in the far North are called Eskimos(爱斯基摩人).In the world of ice and snow it is(1)to grow plants for food.The Eskimos must hunt and fish during the whole year to(2)themselves and their families with food.In winter,they hunt the seal(海豹)(3)the polar(极地的)bear.When they hunt the seal,they(4)a hole in the ice and try to(5)the seal when it comes up to breathe.??
??In summer,the Eskimos hunt(6)animals.and they also hunt birds and catch fish.(7)that is useful is save D.The Eskimos use the meat from animals for food.They melt(融化)the fat from their bodies and use the(8)as fuel(燃料).They make tools out of animals bones.The skin and furs of animals are used for making clothing.??
??If an Eskimo is(9)lucky,he may kill a whale(鲸鱼),(10)a dead whale may wash up on the shore near his house.The whale is an especially useful animal,because it gives a great(11)of oil.??
??There is(12)wood at all where the Eskimos live.Eskimos(13)all their wood from the sea. Sometimes floating wood from places.farther south washes up on the shore.??
??Most Eskimo houses are(14)of stones.Instead of a door,there is a long,low tunnel (地道)(15)into the house.People have to crawl(爬)through the tunnel in order to enter the house.??
A.important
B.impossible
C.impolite
D.interesting
()A.another
B.other
C.others
D.new
()A.Something
B.Everything
C.Anything
D.Nothing
()A.fat
B.1iquid
C.oil
D.rest
()A.supply
B.find
C.look for
D.give
()A.or
B.and
C.but
D.with
()A.much
B.often
C.not
D.very
()A.not
B.no
C.none
D.1ittle
()A.find
B.have
C.receive
D.get
()A.built
B.constructed
C.made
D.piled
()A.going
B.coming
C.1eading
D.winding
()A.many
B.much
C.number
D.deal
()A.find
B.cut
C.beat
D.strike
()A.kill
B.beat
C.hold
D.catch
()A.and
B.or
C.otherwise
D.but
请帮忙给出每个问题的正确答案和分析,谢谢!
People produce food in many ways.Agriculture,or farming,developed thousands of years ago. ___11___about 100 years ago, most farmers in the United States Produced only enough food for their own___12___Today,modern equipment and farming methods have greatly ___13___the American farmer’s productivity.
In various parts of the world,people___14___many animals that supply meat and milk. Cattle, horses, goats, sheep, and pigs are important food animals. In the United States, the cow is the major source of milk products. Chickens___15___ people with both meat and eggs.
Fishing is an important source of food, ___16___in areas near the sea. Some countries, like Japan, consume much more fish than meat.
The wealthy areas of the world consume the most food , ___17___include the United States, Canada, and Europe. Many countries are able to import food if it cannot be produced at home. ___18___Great Britain imports about 75percent of its meat,and grows less than half the food its people require.
___19___people of the poor countries of the world usually eat only what they are able to produce themselves. In some parts of Asia, people live ___20___rice alone.
11.A.In B.Until C.From D.for
12.A.needs B.reasons C.efforts D.interests
13.A.protected B.supported C.increased D.reflected
14.A.grow B.raise C.train D.store
15.A.prepare B.treat C.serve D.provide
16.A.certainly B.actually C.occasionally D.especially
17.A.these B.where C.which D.they
18.A.In addition B.For example C.Above all D.After all
19.A.However B.Therefore C.Moreover D.instead
20.A.with B.for C.on D.through
I stared at the paper,21 reading, couldn’ t help thinking.
Crocodiles are lazy animals as a rule,but they can move like lightening when they want to. And they don’ t mind hurrying 22 they’ re hungry. There used to be lots in Indian rivers, living on fish mostly;but what’ s a little fish for a fifteen-foot crocodile? They ate people,fisherman or anyone else delicious enough to get too near;women doing the 23,or children playing at the water’ s24 A hungry crocodile’ s mouth 25 over a meal with a sound like a gunshot. A big fellow can 26 in a man in two bites (咬).
That woman’ s husband crossed rivers 27 from one crocodile’ s back to the next. I believe it. It had to be done quickly before the creature could see what was happening. It wasn’ t 28 a brave, active man;and no doubt he improved with practice. He could never look 29 while crossing.
The wife used to watch him—I felt sure of that. She lived 30 the adventure, the 31 excitement of it all. Their real life was with tigers,snakes".It’s no wonder she wrote 32 poetry.
Then he died.I imagined how she felt. Was there another man 33 him in India, in the world? She was still young,hardly a sitting-room widow(寡妇)“I must 34 ,too. she said to herself. So she did what she felt she had to do. A 35 probably,to her head.
But her young son,their son? Was her love for him nothing compared to her husband? Well,what do you think?
A.started
B.began
C.finished
D.stopped
A.whenever
B.for
C.because
D.as
A.shopping
B.washing
C.cooking
D.cleaning
A.border
B.end
C.side
D.edge
A.looks
B.sends
C.shuts
D.turns
A.go
B.take
C.eat
D.catch
A.jumping
B.runni
C.walking
D.marching
A.over
B.for
C.behind
D.beyond
A.up
B.down
C.back
D.right
A.without
B.till
C.for
D.on
A.lively
B.friendly
C.deathly
D.lovely
A.angry
B.exciting
C.sad
D.interesting
A.like
B.as
C.with
D.before
A.go
B.practice
C.jump
D.shoot
A.pen
B.gun
C.comb
D.stone
请帮忙给出每个问题的正确答案和分析,谢谢!
A.“Ha”是左脉,也称月亮脉,“tha”指右脉,也称太阳脉
B.“Ha”是右脉,也称月亮脉,“tha”指左脉,也称太阳脉
C.“Ha”是右脉,也称太阳脉,“tha”指左脉,也称月亮脉
D.“Ha”是左脉,也称太阳脉,“tha”指右脉,也称月亮脉
Balloons float in the air_________ boats do on the sea.
A. just as
B. when
C. that
D. where