Fish are animals that live in water. They live in almost any place【11】there is water. Some
where
where 解析:此句缺的是引导定语从句的引导词,表示地点。
where
where 解析:此句缺的是引导定语从句的引导词,表示地点。
第1题
A.When the ecological balance of the river is lost.
B.When people consume more fish than they used to.
C.When large numbers of algae, fish and birds are killed.
D.When the production of marine petroleum is increased.
第2题
The examples of birds and fish are used to ______ .
A.indicate that animals also have their respective cultures
B.explain that human beings occupy a symbolic universe as birds and fish occupy the sky and the sea.
C.illustrate that human beings are unaware of the cultural codes governing them
D.demonstrate the similarity between man, birds, and fish in their ways of thinking
第3题
A.Meat, fish and fruits.
B.Different insects, wild fruits and roots.
C.Seal, boar, whale meat and fish.
D.Different animals and vegetables.
第4题
A.A comparison of fish as a cold-blooded animal with warm-blooded animals.
B.The difference between water animals and land animals.
C.The importance of fish to human beings.
D.How water has affected the development of fish.
第5题
It can be inferred from the passage that the Adirondack now is .
A. lacking in fish
B. deadly quiet
C. alive with wild animals
D. a summer resort
第6题
听力原文: Why do people want to save the Whales? There are two important reasons. One reason is that whales help to keep a balance between plants and animals. People have disturbed this balance. People get rid of their wastes by throwing them into the oceans and seas. People's sewage and garbage increase the salt in ocean and sea water. The increased salt helps some plants and some very small animals to grow. These plants and animals can be harmful to fish. Whales eat enormous amount of plants and animals that grow in very salty water. Therefore, whales are very important because they keep the ocean environment clean enough for fish. In addition, because fish provide necessary food for many people, people need whales, and many people want to save them.
(23)
A.Because whales keep a balance between plants and animals on land.
B.Because whales eat a lot of fish.
C.Because whales eat large amounts of garbage.
D.Because whales keep oceans clean for fish, and people need fish.
第7题
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.
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A.as
B.as if
C.as though
D.since
第8题
听力原文: A fable is a short story which is not true. It is a story that teaches us a lesson. We call the lesson as moral. Fables are often about animals, like the one about the hare and the tortoise. Have you read that fable? Which one have your read? They are not always about animals, However. Here is a Chinese fable.
A fisherman called Ah Chong once went fishing, he lowered a line into the water, on which there were hooks. He intended to come back' later to collect the fish but the line began to feel very heavy so he hauled it into the boat. To his astonishment, a gold chain was on the hook. He hauled the chain into the boat but more and more chain appeared. Soon the bottom of the boat was covered by the glittering links of chain. "I shall be wealthy. I shall have jewels, silk clothes and hundrreds of servants," he thought. He went on pulling in the chain and did not notice that the boat was sinking under the weight of the gold chain. Finally, that boat sank to the bottom of the sea.
(30)
A.A fable is a short, true story that teaches us a lesson.
B.A fable is a short, untrue story about animals.
C.A fable is a short, untrue story with a moral.
D.A fable is a short lesson about animals.
第9题
听力原文: One of the greatest mysteries of nature is the instinct to migrate. Every year, millions of creatures feel the need to migrate and most people have seen the arrival or departure of migrating flocks of birds. In England, for example, we always know when Autumn is coming, because flocks of swallows sit on the telegraph wires. Migration is not only seen in birds but also in reptiles, for example, turtles, frogs and toads. Insects, such as locusts and butterflies; fish, such as eel, salmon and tunas and mammals, such as reindeer, seals, lemmings, whales and bats. Many of these creatures can find their way over long distances. And how they do it is a mystery and a wonder to everyone, especially for those of us who have difficulty even reading a map covering 100 miles. There are several suggestions about how they navigate. Firstly, it is suggested, they navigate by using stars and planets for guidance. Secondly, some people think that these migrating mammals find their way by following the pole of the earth's magnetic field. Thirdly some people think that migrating birds, insects and animals follow a certain smell or scent. Fourthly, another group of people believe that animals migrate by recognizing geographical features. Fifthly, some people think that animals migrate by following changes in temperature. And finally, there are people who suppose they migrate by following sound.
(30)
A.The weather gets hotter.
B.Telegraph wires stand still.
C.Swallows sit on telegraph wires.
D.People find the mystery of migration
第10题
Fishes
The term fish is applied to a variety of cold-blooded aquatic vertebrates of several evolutionary lines. Fish share certain features with other vertebrates. These features are gill slits (鳃裂) at some point in the life cycle, a notochord (脊索), or skeletal supporting rod, a dorsal hollow nerve cord, and a tail.
The study of fishes, the science of ichthyology (鱼类学), is of broad importance. There are many reasons why fishes are of interest to humans; the most important is their relationship with and dependence on the environment. A more obvious reason for interest in fishes is their role as a moderate but important part of the world's food supply. This resource, once thought unlimited, is now realized to be finite and in delicate balance with the biological, chemical, and physical factors of the aquatic environment. Overfishing, pollution, and alteration of the environment are the chief enemies of proper fisheries management, both in fresh waters and in the ocean.
Another practical reason for studying fishes is their use in disease control. As predators on mosquito larvae, they help curb malaria and other mosquito borne diseases. Fishes are valuable laboratory animals in many aspects of medical and biological research. For example, the readiness of many fishes to acclimate to captivity has allowed biologists to study behaviour, physiology, and even ecology under relatively natural conditions. Fishes have been especially important in the study of animal behaviour where research on fishes has provided a broad base for the understanding of the more flexible behaviour of the higher vertebrates.
There are aesthetic and recreational reasons for an interest in fishes. Millions of people keep live fishes in home aquariums for the simple pleasure of observing the beauty and behaviour of animals otherwise unfamiliar to them. To many, aquarium fishes provide a personal challenge, allowing them to test their ability to keep a small section of the natural environment in their homes. Sportfishing is another way of enjoying the natural environment, also indulged in by millions of people every year. Interest in aquarium fishes and sportfishing support multimillion dollar industries throughout the world.
Fishes have been in existence for more than 450,000,000 years, during which time they have evolved repeatedly to fit into almost every conceivable type of aquatic habitat. In a sense, land vertebrates are simply highly modified fishes, for when fishes colonized the land habitat they became tetrapod (四足的) land vertebrates. The popular conception of a fish as a slippery, streamlined aquatic animal that possesses fins and breathes by gills applies to many fishes, but far more fishes deviate from that conception than conform. to it. For example, the body is elongate in many forms and greatly shortened in others; the body is flattened in some (principally in bottom-dwelling fishes) and laterally compressed in many others; the fins may be elaborately extended, forming intricate shapes, or they may be reduced or even lost; and the positions of the mouth, eyes, nostrils, and gill openings vary widely. Air breathers have appeared in several evolutionary lines.
Many fishes are cryptically coloured and shaped, closely matching their respective environments; others are among the most brilliantly coloured of all organisms, with a wide range of hues, often of striking intensity, on a single individual. The brilliance of pigments may be enhanced by the surface structure of the fish, so that it almost seems to glow. A number of unrelated fishes have actual light-producing organs. Many fishes are able to alter their coloration, some for the purpose of camouflage, others for the enhancement of behavioral signals.
Fishes range in adult length from less than 10 millimetres to more than 20 metres and in weight from about 1.5 grams to many thousands of kilogr
A.Y
B.N
C.NG