人教版 (2019)选择性必修 第四册Unit 3 Sea Exploration评课课件ppt
展开1．Ocean is the cradle of life.
海洋是生命的摇篮。
2．Save our ocean for the sake of life on the earth.
为了地球上的生命拯救我们的海洋吧。
3．Fish can't stir the sea，fog can't overwhelm the mountains.
鱼搅不浑大海，雾压不倒高山。
4．The sea is not afraid of more rain，but a good man is not afraid of more difficulties.
大海不怕雨水多，好汉不怕困难多。
5．The big boat needs to go deep and the dragon needs to swim in the middle of the sea.
大船要在深水行，蛟龙要在海中游。
Some people have seen the sea，but others haven't.The sea looks beautiful on a fine day.But it can be very rough when there is a strong wind.
The sea is very large.There is more sea in the world than land.
If you have swum in the sea，you know that the sea is salty.Do you know the Dead Sea? It is so salty that you can't sink when you are in the water.And fish can't live in it!
When whales die and sink to the ocean floor，their bodies—known as whale falls—provide rich nutrients for other creatures of the deep.
Chinese scientists found a whale fall in the South China Sea during a recent scientific research voyage.It was the first time that Chinese researchers had run across this rare type of ecosystem.It was an important finding，showing China's progress in deepsea exploration technology，Xie said，a professor at Sun Yatsen University.
During the 22day deepsea exploration from March 10 to April 2，60 scientists conducted 22 dives and successfully completed a number of scientific tasks.The research aimed to gather information about the key processes of typical seamount ecosystems in the Western Pacific Ocean.The whale fall was found in a seamount 1，600 meters deep in the central South China Sea.Though the whale fall was only about 3 meters long，it was of great importance in understanding the sea ecosystems，Xie said.
There were dozens of white armored shrimp，red shrimp and several eels found near the whale fall.The eels were eating the tail muscles of the whale fall.This shows that the whale died not long ago and that the whale fall was still in the first stage of decomposition and thus had rare value for longterm observation，Xie said.
[探索发现]
1．What do we know about the whale fall in the South China Sea?
It is a rare sea ecosystem.
2．How is the Paragraph 3 organized?
By giving data.
3．What does the text mainly tell about?
A whale fall found in the South China Sea.
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