题型:阅读理解 题类:常考题 难易度:普通
河北省唐山一中2019届高三上学期英语期中考试试卷
Reintroducing beavers (海狸) to Britain could help clean up rivers, prevent flooding and minimise soil loss, an expert has claimed.
Professor Richard Brazier, a researcher at the University of Exeter, said unpublished results from a trial area in Devon showed muddy water entering an area where beavers were living was three times cleaner when it left. "Our trial has shown that the beavers are able to dam our streams in a way that keeps soil in the headwaters of our catchment (流域) so it doesn't block up rivers downstream and pollute our drinking and bathing waters. If we bring beavers back it's just one tool we need to solve Britain's crisis of soil loss and agricultural pollution of waterways, but it's a useful tool," he said.
Prof Brazier's claims were disputed by the National Farmers' Union (NFU), which warned that the reintroduction of beavers to Scotland had led to fields and forests becoming damaged. Spokesman Mark Pope said: "The knowledge of the impacts beavers have had on farmland, riverbanks and flood defences in Scotland is concerning. We await the results of the Devon trial and will analyse the outcomes then."
Prof Brazier, an expert in Earth Surface Processes, insisted the animals could even play a useful role in preventing flooding. He told BBC News: "The public is currently paying people to build leaky dams to keep storm waters in the uplands. The beavers can do it free of charge and even build their own homes."
However, Professor Jane Rickson, a soil specialist from Cranfield University, Bedfordshire, joined the NFU in sounding a note of caution. She agreed that in some places in the UK there was evidence of worrying soil loss, and said new policies were urgently needed. Beavers may in fact reduce the river channel and remove vegetation, exposing banks to greater erosion (侵蚀) and increasing, rather than decreasing, the risk of flooding, she warned. And she said beaver dams should be "leaky" to avoid build-ups of large volumes of water.
Chinese New Year for Kids
Chinese New Year for Kids is a full color paperback book with beautiful Chinese illustrations (插图). This is a hands-on workbook for parents and teachers, written for children from ages 3 to 12 years old, for use in the classroom or at home. Music, physical movement, art, and food all add to the atmosphere of taking an imaginary trip to China during the Chinese New Year.
Author: Cindy Roberts |
Date: 2002-10-01 |
List Price: $ 9.95 |
Price: $ 8.95 Buy it On Amazon.com |
The Polar Express
One couldn't select a more delightful and exciting premise (前提) for a children's book than the tale of a young boy lying awake on Christmas Eve only to have Santa Claus sweep by and take him on a trip with other children to the North Pole. And one couldn't ask for a more talented artist and writer to tell the story than Chris Van Allsburg.
Author: Chris Van Allsburg |
Date: 1985-10-28 |
List Price: $18.95 |
Price: $ 12.89 Buy it On Amazon.com |
The Secret of Saying Thanks
Perhaps you'd like to know a secret, one of the happiest ones of all. You'll discover it all on your own, maybe when you least expect. If you've not yet discovered the secret of saying thanks, it's waiting for you. The secret can be found in the sunrise that offers promises for the day ahead, or in the gentle shade of a tree sheltering you from the hot rays of the sun.
Author: Douglas Wood |
Date: 2005-9-27 |
List Price: $ 16.95 |
Price: $ 11.53 Buy it On Amazon.com |
The Runaway Pumpkin
When Buck, Billy and their little sister Lily spy the biggest pumpkin they've ever seen, they can't resist (抵制). Buck and Billy try to roll the pumpkin down the hill to show everyone, but it's too big! Before they know it, it's rolling out of control down the hillside. It knocks over Gran dpa Baxter and makes him think of pumpkin soup. And when Poppa Baxter finally stops, all he can think of is pumpkin bread.
Author: Kevin Lewis |
Date: 2003-09-01 |
List Price: $ 15.95 |
Price: $ 6.38 Buy it On Amazon.com |
试题篮