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[单项选择]Rainforests
Did you know there are two types of Rainforest—the temperate and the tropical Tropical rainforests are found close to the equator. Temperate rainforests are found along coasts in the temperate zone, such as the Pacific Northwest of the USA. Both are endangered!
Rainforests Endangered!
Today only about three percent of the original temperate rainforest in the U. S. A. remains, mostly inside Olympic National Park in Washington State. Prior to the arrival of homesteaders just over a century ago, the Olympic Peninsula contained more than a million acres of old-growth spruce and hemlock. Because of habitat destruction, many plants and animals have become "island dwellers" inside the park now.
Tropical rainforests comprise only 40% of the world’’s tropical forests and only 20% of the world’’s total forests. They cover 6%—7% of the Earth’’s land surface. Half of the world’’s plant and animal species live in the tropical rainforests of the world. Thirty acres of tr
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Did you know that the parachute was invented before the airplane This is (1) but true. The first airplane was flown in 1903. However, Leonardo da Vinci, the Italian artist-scientist, drew sketches of a (2) over 450 years ago. The first successful parachute jump was made from a tower (3) a French scientist, Sebastien Lenormand, in 1783. In 1785 J. P. Blanchard of France used a parachute to eject a dog from a hot-air balloon.
People (4) to use parachutes first for thrills and fun. Andre Jacques Garnerin, also of (5) , was the first to drop from a balloon at a (6) of 2000 feet using a parachute. Garnerin continued to parachute for a number of years, as (7) many others. It wasn’t until World War I, (8) , that the parachute became important for saving lives. By the end of the war, it had become standard safety equipment for nearly all (9) . In addition, parachutes were also worn by military pas
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