题型:阅读理解 题类:常考题 难易度:普通
湖南省衡阳市第一中学2018-2019学年高二下学期英语期中考试试卷
Floating on the surface of the seas of the world are billions of tons of small plants and animals called plankton. Most of these plants and animals are too small for the human eye to see. They move about lazily with the currents, providing a basic food for many larger animals. Plankton has been described as the equivalent (相等的东西) of the grasses that grow on dry land, and the comparison is an appropriate one. In potential food value, however, plankton far outweighs that of land grasses. One scientist has estimated that while grasses of the world produce about 49 billion tons of valuable carbohydrates(碳水化合物) each year, the sea's plankton produces more than twice as much.
Despite its enormous food potential, little effort was made until recently to farm plankton as we farm grasses on land. Now scientists have at last begun to study this possibility, especially as the sea's resources appear even more important as a means of feeding an expanding world population.
No one yet has seriously suggested that “planktonburgers” may soon become popular around the world. As a possible farmed supplementary food source, however, plankton is gaining considerable interest among scientists.
One type of plankton that seems to have great harvest possibilities is a tiny creature called krill(磷虾). Growing to two or three inches long, krill are a major food source for the giant blue whale, the largest animal ever to live on the Earth. Realizing that this whale may grow 100 feet and weigh about 150 tons, it is not surprising that each one swallows more than one ton of krill daily.
Krill swim about just below the surface in huge schools sometimes wide, mainly in the cold Antarctic. Because of their pink color, they often appear as an entire reddish mass when viewed from a ship or from the air. Krill are very high in food value. If krill can feed such huge creatures as whales, many scientists reason, they must certainly be competitors among possible new food sources for humans.
Our warming planet is expected to face serious water crisis(危机)in the coming decades — which means each nation's natural resource will be more important than ever. |
Classis Book Club for Home-schooled Teens
★ Sign up at Librarian's 1st Floor Reference Desk.
★ Free books for first 15 teens who sign up for each title. If you are unable to attend the activity, please return the book to Teen Librarian so she can give the book to another teen.
Classics for Home-schooled Teens
Fridays, 1:00~2:00 pm, Library Room 215
January 23: The Old Man and the Sea by Ernest Hemingway
February 20: Antigone by Sophocles
March 20: Fahrenheit 451 by Ray Bradbury
April 24: Catcher in the Rye by J.D. Salinger
For information contact Teen Librarian Elise Sheppard, elise.i.sheppard@lonestar.edu, 281-290-5248.
5th Annual Prom-dress Give-away
Lone Star College — CYEAIR BRANCH LIBRARY'S PROM CLOSET
Your dress is free for you to keep.
If you Need a Prom Dress
Contact the Youth Service Specialist at your school/ Contact Prom Closet organizers directly:
LSC-CF Teen Librarian Elise Sheppard at 281-290-5248, elise.i.sheppard@lonestar.edu
LSC-CF Friends of the Library President Nancy Flanakin at meaford8510@vahoo.com
Saturday dates to get a dress:
(Other dates by appointment only — contact Elise or Nancy)
Dates | Times | Locations at LSC-CF Branch Library |
March 21 | 1:00—5:00 pm | Library Room 131 |
March 28 | 1:00—5:00 pm | Activity Room of Kid's Comer (Children's Library) |
April 4 | 1:00—5:00 pm | Library Room 131 |
April 11 | Library closed | |
April 25 | 1:00—5:00 pm | Library Room 131 |
Prom Dresses Needed!
Dresses & accessories needed: All dress sizes 0 — 26
Accessories: Shoes, handbags, jewelry, hair pieces, shawls, etc.
Perfect condition: Clean, undamaged, beautiful
Delivery instructions:
Take donations to Lone Star College — CyFair Branch Library Circulation/Customer Service Desk anytime the library is open.
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