题目内容
Explore Jordan
Wadi Rum is the name given to a valley cut into the sandstone and hard rock in southwest Jordan. __________ (46) The name Rum most likely comes from an Aramaic word meaning "high" or "elevated". The area around Wadi Rum is now also one of Jordan&39;s most important tourist destinations, and attracts an increasing number of foreign tourists, particularly trekkers (越野者) ,but also for camel safaris (旅行) or simply day-trippers from Aqaba or Petra. In contrast, there are almost no local or Arab tourists, through Disi attracts young people from Amman at the weekends.
Popular activities in the desert environment include camping under the stars, riding Arab horses, and rock-climbing amongst the massive rock formations. Jebal Rum (Jebal means"mountain") is 1,574 meters above sea level.__________(47)
But Jordan is not simply a desert environment- it also contains the area which is the lowest point to the face of the Earth-- the incredible Dead Sea, popular with tourists for swimming.
__________ (48) Once the waters reach the Dead Sea, they are landlocked and have nowhere to go, so they evaporate, leaving behind a dense, rich cocktail (混合的 ) of salts and minerals that supply industry, agriculture and medicine with some of its finest products. Once again, tourists benefit and can participate in water spa treatments and water therapies.
The Dead Sea is located in the Syro-African Rift, a 4,000-mile fault line in the Earth&39;s crust. The lowest point of dry land on Earth is the shoreline of the Dead Sea at 1,300 feet below sea level Because the lake is at the lowest point, this means that water does not drain from it.__________ (49)
Figures for the Dead Sea&39;s salinity (盐度) today range from 25% to 35%.
But the greatest tourist attraction is the incredible city of Petra.__________(50) It is a vast,unique city, carved into the sheer rock face by the Nabataeans, an industrious Arab people who settled here more than 2,000 years ago, turning it into an important junction for the silk, spice and other trade routes that linked China, India and southern Arabia with Egypt, Syria, Greece and Rome.
Today, visitors can marvel at the architecture and explore life as it was thousands of years ago.
第46题__________ 查看材料
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Operation Migration
If you look up at the sky in the early fall in the northern part of North America, you may see groups of birds. These birds are flying south to places where they can find food and warmth for the winter. They are migrating (迁徙) . The young birds usually learn to migrate from their parents.
They follow their parents south, in one unusual case, however, the young birds are following something very different. These birds are young whooping cranes, and they are following an airplane!
The whooping crane is the largest bird that is native to North America. These birds almost disappeared in the 1800s. By 1941, there were only about 20 cranes alive. In the 1970s, people were worried that these creatures were in danger of disappearing completely. As a result, the United States identified whooping cranes as an endangered species that they needed to protect.
Some researchers tried to help. They began to breed whooping cranes in special parks to increase the number of birds. This plan was successful. There were a lot of new baby birds. As the birds became older, the researchers wanted to return them to nature. However, there was a problem:
These young birds did not know how to migrate. They needed human help.
In 2001, some people had a creative idea. They formed an organization called Operation Migration. This group decided to use very light airplanes, instead of birds, to lead the young whooping cranes on their first trip south. They painted each airplane to look like a whooping crane.
Even the pilots wore special clothing to make them look like cranes. The cranes began to trust the airplanes, and the plan worked.
Today, planes still lead birds across approximately 1,200 miles (1,931 kilometers), from the United States-Canadian border to the Gulf of Mexico. They leave the birds at different sites. If a trip is successful, the birds can travel on their own in the future. Then, when these birds become parents, they will teach their young to migrate. The people of Operation Migration think this is the only way to maintain the whooping crane population.
Operation Migration works with several other organizations and government institutes.
Together, they assist hundreds of cranes each year. However, some experts predict that soon, this won&39;t be necessary. Thanks to Operation Migration and its partners, the crane population will continue to migrate. Hopefully, they won&39;t need human help any more.
Whooping cranes migrate in winter to__________. 查看材料
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