A.know you are unique |
B.lose the bslance of life |
C.begin to learn something new |
D.get tired of routine practice |
A.forget daily fear and pain |
B.choose the right example |
C.a(chǎn)sk others for decisions |
D.stay away from stars |
A.desperate to intruence others with their knowledge |
B.ready to turn their original ideas into reality |
C.eager to discover what their ancestors did |
D.willing to accept others’ideas |
A.the lack of strong motivation |
B.the absence of practical ideas |
C.how to search for more materials |
D.how to use imagination creatively |
A.To highlight the importance of creatively. |
B.To criticize the characters of role models. |
C.To compare imitation with creation. |
D.To explain the meaning of success. |
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A.conditions of life in Biosphere 2 |
B.building controlled environments on other planets |
C.why Biosphere 2 failed in the past |
D.what makes a good biosphere colonist |
A.a(chǎn) group of eight colonists |
B.Columbia University |
C.the city of Tucson |
D.scientists who hope to establish Biosphere 3 |
A.did not like living in a controlled environment |
B.found it very difficult to live in a controlled environment |
C.still are involved with Biosphere 2 |
D.have now left the country in disgrace |
A.comparing its features with those of an outer space biosphere |
B.explaining the process by which it was constructed |
C.referring to an interview with one of former inhabitants |
D.describing its appearance and conditions |
A.well known for something good | B.well known for something bad |
C.very dangerous | D.quite interesting |
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A.the amount of air in the plane | B.the strength of the plane structure |
C.the pressure inside and outside the plane | D.the power of the airplane engines |
A.It will be broken. | B.It will be made stronger. |
C.It will be filled with water. | D.It will be tested by pilots, |
A.The plane may explode in the air. | B.The pilot may lose control of the plane. |
C.The engines may be damaged. | D.Too much air may get into the plane. |
A.Two Important Tests on Airplanes | B.The Importance of Flying Safely |
C.The Danger of Testing Airplanes | D.How Airplanes Are Made and Tested |
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A.payment | B.medicine | C.education | D.music instrument |
A.Even a man with no music knowledge can be a rock star in the future. |
B.Students should go out into the community to learn from business owners instead of staying at school to learn from books. |
C.We can carry no cash while shopping in the future. |
D.We can feel more pain with the method of inoculation. |
A.Entertainment. | B.Production. |
C.Technology. | D.Work. |
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A.A union for listing animals and plants on the earth |
B.A group of volunteers who are interested in wildlife |
C.An organization concerning the protection of rare species' survival |
D.A government made up officials, scientists and experts |
A.All the protection methods can’t work. |
B.The IUCN does most of the protection. |
C.The efforts China makes has paid off. |
D.Enough is done in wildlife protection. |
A.Bad weather | B.Over-hunting | C.Warmer oceans | D.Habitat destruction |
A.China has been paying great attention to protecting the natural resources. |
B.China has set up a lot of natural reserves. |
C.The natural reserves in China cover more than 15 percent of the nation's land area. |
D.The rate of China's natural reserves is lower than the average of the world. |
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A.help the person reach firm ground |
B.help prevent panic |
C.make the same sand yield temporarily |
D.make the sand hold the person’s weight |
A.a(chǎn) mass of fine sand mixed with water | B.formed only along rivers |
C.found below subsurface water | D.solid ground |
A.Stretches of quicksand are found only under the sea. |
B.People should never try to escape from quicksand. |
C.It is hard to keep calm if you fall into quicksand. |
D.Only heavy people can be trapped in quicksand. |
A.what solid ground looks like | B.the nature of quicksand |
C.stepping into quicksand | D.escaping from quicksand |
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Humpback whales are sometimes called performers of the ocean. This is because they can make impressive movements when they dive. The name “humpback”, which is the common name for this whale, refers to the typical curve shape the whale’s back forms as it dives. Sometimes the humpback will dive with a fantastic movement, known as a breach. During breaching the whale uses its powerful tail flukes to lift nearly two-thirds of its body out of the water in a giant leap. A breach might also include a sideways twist with fins stretched out like wings, as the whale reaches the height of the breach. A humpback whale breathes air at the surface of the water through two blowholes which are located near the top of the head. It blows a double stream of water that can rise up to 4 meters above the water. The humpback has a small dorsal fin located towards the tail flukes about two-thirds of the way down its back. Other distinguishing features include large pectoral fins, which may be up to a third of the body length, and unique black, and white spots on the underside of the tail flukes. These markings are like fingerprints: no two are the same. Humpback whales live in large groups. They communicate with each other through complex “songs”. | Quick Facts | |
Size: | 14m~18m in length 30~50 tons in weight | |
Living environment: | Open ocean and shallow coastline waters | |
Migration: | From warm tropical (熱帶的) waters, where they breed, to cold polar waters, where they eat. | |
Diet: | Shellfish, plants and fish of small size | |
Hunting: | Sometimes in groups, in which several whales form a circle under the water, blowing bubbles that form a “net” around a school of fish. The fish are then forced up to the surface in a concentrated mass. | |
Current state: | Endangered: it is estimated that there are about 5000~7000 humpback whales worldwide. |
A.cannot survive in waters near the shore |
B.doesn’t live in the same waters all the time |
C.lives mainly on underwater plants |
D.prefers to work alone when hunting food |
A.use its tail flukes to leap out of the water |
B.twist its body sideways to jump high. |
C.blow two streams of water |
D.communicate with a group of humpbacks. |
A.has its unique markings on it tail flukes |
B.has black and white fingerprints |
C.gets its name from the way it hunts |
D.is a great performer due to its songs |
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A.Birds often eat strange and funny things. |
B.Ostriches will swallow anything to help them digest food. |
C.One ostrich died with 484 coins in its gizzard. |
D.Ostriches are often hurt by cruel or careless people. |
A.digest its own food | B.eat only diamonds |
C.a(chǎn)void eating harmful objects | D.escape from the zoo |
A.important | B.a(chǎn)live |
C.dangerous | D.uncomfortable |
A.foolish | B.careless | C.deadly | D.cruel |
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A.reflect(反射) more heat into the atmosphere |
B.bring about high rainfall throughout the world |
C.rarely cause the temperature to drop lower than 16℃ |
D.reduce the effect of heat from the sun on the earth |
A.We will lose much more than we can gain. |
B.Humans have begun destroying rainforests. |
C.People have a strong desire for resources. |
D.Much carbon dioxide comes from burning rainforests. |
A.How to Save Rainforests | B.How to Protect Nature |
C.Rainforests and the Environment | D.Rainforests and Medical Development |
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