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五年级下册《UNIT 3 THE ENVIRONMENT AND US Lesson 17》优秀ppt课件
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Water
01
What can you hear?
02
What do you know about water?
Can we use salt water?
What is salt water?
What is fresh water?
Salt water is water from and .
Fresh water is water from and .
seas
oceans
rivers
lakes
salt water
fresh water
Water is important.
People and animals need water to live.
Plants need water to grow.
waste water
make water dirty
keep