填空题
[A] If the krill can feed such huge creatures as whales, they must certainly be contenders as food for humans. Actually, they are not merely food for people. In human studies, Krill Oil supplementation demonstrates anti-aging characteristics and anti-wrinkle fighting power, supports healthy joints, the heart, lipid and blood sugar levels, energy production, athletic performance and liver function, and eases women"s PMS symptoms.
[B] No one yet has seriously suggested that "plankton burgers" may soon become popular around the world. As a possible farmed supplementary food source, however, plankton is gaining considerable interest among marine scientist.
[C] Despite its enormous food potential, little effort was made until recently to farm plankton we farm grasses on land. Now, marine scientists have at last begun to study this possibility, especially as the sea"s resources loom even more important as a means of feeding an expanding world population.
[D] Krill swim about just below the surface in huge schools sometimes miles wide, mainly in the cold Antarctic. This creature is very high in food value. Each krill consists of about 15% high quality protein containing vital amino acids and about 3% fat and vitamins. It also supplies minerals such as iron, phosphorus, and calcium. A pond of these crustaceans contains about 460 calories—about the same as shrimp or lobster, to which they are related.
[E] The name of plankton is derived from the Greek word
("planktos"), meaning "wanderer" or "drifter". Plankton has been described as the equivalent of the grasses that grow on the dry land continents, and the comparison is an appropriate one. In potential food value, however, plankton far outweighs that of the land grasses. One scientist has estimated that while grasses of the world produce about 49 billion tons of valuable carbohydrates each year, the sea"s plankton generates more than twice as much.
[F] One type of plankton that seems to have great harvest possibilities is a tiny shrimp like creature called krill. The name comes from a Norwegian term meaning "small fry", and specifically refers to a species of pelagic marine plank tonic crustaceans. Growing to two or three inches long, krill provide the major food for the giant blue whale, the largest animal ever to inhabit the earth. Realizing that this whale may grow to 100 feet and weigh 150 tons at maturity, it is not surprising that each one devours more than one ton of krill daily.
[G] In view of the distribution of the krill, farming is certainly difficult, but the 2008 fishing season of krill in the Antarctic Ocean started in February/March. There has been speculation that the harvesting of krill in the Antarctic is decreasing the population too quickly due to global warming. However, the current quota for krill harvesting set down by the industry has not been reached. The danger to the ecosystem of the Antarctic region is therefore not being harmed by the current amount of krill taken from the ocean.
[H] Scattered through 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. While some forms of plankton are capable of independent movement and can swim up to several hundreds of meters vertically in a single day (a behavior called diel vertical migration), their horizontal position is primarily determined by currents in the body of water they inhabit. They drift about lazily with the currents, providing a basic food for many larger animals.
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[B] No one yet has seriously suggested that "plankton burgers" may soon become popular around the world. As a possible farmed supplementary food source, however, plankton is gaining considerable interest among marine scientist.
[C] Despite its enormous food potential, little effort was made until recently to farm plankton we farm grasses on land. Now, marine scientists have at last begun to study this possibility, especially as the sea"s resources loom even more important as a means of feeding an expanding world population.
[D] Krill swim about just below the surface in huge schools sometimes miles wide, mainly in the cold Antarctic. This creature is very high in food value. Each krill consists of about 15% high quality protein containing vital amino acids and about 3% fat and vitamins. It also supplies minerals such as iron, phosphorus, and calcium. A pond of these crustaceans contains about 460 calories—about the same as shrimp or lobster, to which they are related.
[E] The name of plankton is derived from the Greek word
("planktos"), meaning "wanderer" or "drifter". Plankton has been described as the equivalent of the grasses that grow on the dry land continents, and the comparison is an appropriate one. In potential food value, however, plankton far outweighs that of the land grasses. One scientist has estimated that while grasses of the world produce about 49 billion tons of valuable carbohydrates each year, the sea"s plankton generates more than twice as much.
[F] One type of plankton that seems to have great harvest possibilities is a tiny shrimp like creature called krill. The name comes from a Norwegian term meaning "small fry", and specifically refers to a species of pelagic marine plank tonic crustaceans. Growing to two or three inches long, krill provide the major food for the giant blue whale, the largest animal ever to inhabit the earth. Realizing that this whale may grow to 100 feet and weigh 150 tons at maturity, it is not surprising that each one devours more than one ton of krill daily.
[G] In view of the distribution of the krill, farming is certainly difficult, but the 2008 fishing season of krill in the Antarctic Ocean started in February/March. There has been speculation that the harvesting of krill in the Antarctic is decreasing the population too quickly due to global warming. However, the current quota for krill harvesting set down by the industry has not been reached. The danger to the ecosystem of the Antarctic region is therefore not being harmed by the current amount of krill taken from the ocean.
[H] Scattered through 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. While some forms of plankton are capable of independent movement and can swim up to several hundreds of meters vertically in a single day (a behavior called diel vertical migration), their horizontal position is primarily determined by currents in the body of water they inhabit. They drift about lazily with the currents, providing a basic food for many larger animals.
Order: