托福阅读真题第182篇TheOriginofCoralReefs(答案文章最后) The Origin of Coral Reefs Paragraph 1:Coral reefs are natural structures formed from deposits of the calcium carbonate secretions of coral, a marine animal that lives in colonies. In general, coral reefs are grouped into one of three categor...
Paragraph 1: Coral reefs are natural structures formed from deposits of the calcium carbonate secretions of coral, a marine animal that lives in colonies. In general, coral reefs are grouped into one of three categories, atolls, barrier reefs, and fringing reefs. Atolls are usually easily disting...
Coral reefs are natural structures formed from deposits of the calcium carbonate secretions of coral, a marine animal that lives in colonies. In general, coral reefs are grouped into one of three categories, atolls, barrier reefs, and fringing reefs. Atolls are usually easily distinguished because...
As a consequence of the elevation, a portion of the sea-bottom was brought well up into the waters of the Gulf Stream, which were probably shifted a little eastward.ARCH.KNatureGuppy, H., 1890. The origin of coral reefs. Proceedings of the Victorian Institute 23, 51 - 68....
There are thousands of coral reefs(珊瑚礁) in the world; Unfortunately, however, they are now in serious danger. More than one-third are in such bad shape that they could die within ten years.(1) ___ Here are the three main causes discovered. The first cause is pollution on land. ...
of coral reefs. If Darwin’s theory was correct, it must be assumed that drilling down through the current atoll reefs would yield layer after layer of reef limestone until, finally, volcanic rock would be encountered. The ability to drill to the base of atoll reefs and resolve the problem...
所属专辑:新托福阅读真经6 音频列表 1 11.The Development of Printing(印刷术的发展) 119 2020-07 2 10.The Original of Coral Reefs(珊瑚礁起源) 52 2020-07 3 9.Olmec Art(奥尔梅克艺术) 80 2020-07 4 8.Alaska and Bark Beetles 49 2020-07 ...
17.There are thousands of coral reefs(珊瑚礁) in the world; Unfortunately,however,they are now in serious danger.More than one-third are in such bad shape that they could die within ten years.(36)BHere are the three main causes discovered.The first cause is pollution on land.The pollutan...
The economic importance of coral reefs A lot of people around the world are dependent, or partly dependent, on coral reefs for their livelihoods. They often live adjacent to the reef, and their livelihood revolves around the direct extraction, processing and sale of reef resources such as shell...
The world’s coral reefs(珊瑚礁) are increasingly being threatened, mostly because of human activities. A group of environmental organizations published a report about it . For the first time, it also considered the effect of climate change on these threatened se a organisms(生物体). Jane Lubch...