Saltwater crocodiles are the world's largest crocodiles,sometimes reaching 23 feet in length and topping 2,200 pounds.Yet these crocodiles hunt quietly,lying in wait below shoreline waters to attack crabs,turtles and thirsty animals that have come to drink.Saltwater crocodiles kill a number of people each year.
There is no doubt that the great white shark sits atop the ocean food chain.The world's largest fish can weigh at over 5,000 pounds and reach lengths of more than 20 feet.Great white sharks have about 3,000 teeth,which they typically sink into sea lions,seals,small toothed whales,and sea turtles.These sharks are responsible for a third to a half of the 100 shark attacks on humans every year.
The sea anemone
(海葵) may look like the beautiful flower for which it's named,but fish that swim too close may regret it.The sea anemone,which lives on the sea floor,uses its poisonous tentacles (触须) to stab passing creatures with a kind of poison—making them helpless and fit to be eaten.
The surgeonfish (刺尾鱼) is an attractive reef fish that is poisonous.Scientists believe that the world's seas hold some 1,200 different surgeonfish species and think that they injure about 50,000 people per year.But the surgeonfish poison can also bring great benefit—they are useful in the development of new drugs.
【语篇解读】 本文介绍了5种危险的海洋生物。
【2017届高考英语一轮复习阅读理解解析版汇编:42(含解析)】相关文章:
★ 2017届高考英语一轮复习阅读理解解析版汇编:85(含解析)
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