石油人职称英语2022考试宝典
\ocean is the place where we should be putting our efforts in order to provh than these men.
It will take him years of the most painstaking instrument building,campaigns at sea,and every conceivable cross-check to establish the doubt.
One aspect of oceanography that has fallen into neglect is that of identifying fish: taxonomy. One main branch of sea science,physical oceanography,holds enormous unanswered questions. One of the great taxonomists is . Smith of South Africa,the discoverer of the fabulous coelacanth.
Only if these negative results are valid will he be able to formulate the question: how do they live,if not by photosynthesis?
pulsing jelly fish,darting shrimp,fixed colonies5 of coral polyps,and crawlers and diggers of the floor.
Sea and air are divided by a viscous curtain;
Seventy-one percent of the earth's surface is covered by water.
Somewhere in his files,Smith recalled seeing the animal as an empty fossil split from a rock.
Take the theory of photosynthesis,which holds that the growth of all vegetation,and consequently of animals,depends on the action of the sun on carbon dioxide and water.
The athletic animals come up to graze in this fertile prairie and become links in extensive food chains,formed roughly along the lines3 suggested by Shakespeare
The Atlantic hydrographic chart is being revised continuously,and nuclear submarines are now
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charting the Arctic basin under the ice. The food chains extend to the abyss.
The French navy has built an abyssal bathyscaphe to take three men to the floor of the Marianas Trench.
The mature eel has not been discovered,but it could possibly come in sea serpent dimensions. The most amazing fact about this inverted life pyramid is that only 2% o
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