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语篇训练卷(十一)
Unit 3 Task & Project
Ⅰ. 阅读理解
A
(2013·常州高一检测)
Throughout seafaring history，ships and sailors have been lost to storms，accidents and war. Until recently，most of these ships were weak wooden sailing vessels(船只)，their skeletons(骨架)quickly eaten away by sea creatures.
Now，large vessels made of steel float on the seas. Thousands of these huge ships have been lost in times of war and in times of peace. The bones of great metal ships，unlike the wooden vessels of old，survive the destruction of the sea long enough to become home and harbor for underwater life of all kinds.
The ship has been underwater for only five days. Its surface is still clean. Six weeks later，the wreck is covered with a slimy layer of algae(海藻). Soon，animals that need to attach themselves to a hard surface，like the feather duster worms，make the wreck their home.
In warm waters，coral polyps(珊瑚虫)settle on the wreck and begin the process
