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题型:阅读理解-阅读单选 难度:0.65 引用次数:56 题号:18805748

Super typhoon Rammasun swept over Hainan, China, destroying at least 23,000 houses and causing 2 billion dollars in damage. It was not just people who experienced the impact, though. In Hainan Bawangling National Nature Reserve, home to the world’s 30 remaining Hainan gibbons(长臂猿), landslides tore through sections of the forest. The gibbons, a species living in trees, were forced to jump across a distance of up to 50 feet to get from one area to another.     

The gibbons sometimes would break their fall only by managing to catch hold of the tip of a particular palm leaf. As months passed, Bosco Chan at the Kadoorie Farm and Botanic Garden in Hong Kong noticed that constant use caused the leaf to wear and bend downward, threatening to lead to the gibbons crashing down and breaking the extremely rare species’ habitat into different islands. “It’s really a matter of concern. Moreover, I didn’t know how long the leaf would be able to hold the gibbons,” he said. “I thought it was time for us to build something.”

As recently described in Scientific Reports, Bosco Chan and his colleagues turned to aerial(空中的) bridges. They hired professional tree climbers to confront and get over the steep landform to fix a simple bridge, consisting of two parallel mountaineering-grade ropes. It took the gibbons over five months to catch on, but once they learned to use the ropes, they started regularly using them to make safe, quick crossings.

Till now, aerial bridges have been used in other countries to help a diversity of animals ranging from squirrels to capuchin monkeys. But many are small, one-off projects carried out by local organizations or even individuals; with little or no scientific study of what does or does not work. In addition, a solution for one species or habitat may not be applicable to another.

1. What can be learned about Hainan gibbons?
A.They are severely endangered.
B.They mainly feed on palm leaves.
C.They are good at long-distance jumping.
D.They suffer a slight reduction in population.
2. What makes Bosco Chan worried about the gibbons?
A.Their weak link with nature.B.Their fear of jumps between trees.
C.Their survival affected by typhoons.D.Their habitats’ likely being damaged.
3. Which can best explain the underlined word “confront” in paragraph 3?
A.Make use of.B.Get rid of.C.Take down.D.Deal with.
4. Which aspect of aerial bridges does the last paragraph talk about?
A.Their importance.B.Their limitations.
C.Their potential uses.D.Their long-term effects.
【知识点】 人与动植物 说明文

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