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          5. The boy saw two snakes in the (灌木叢) yesterday.
          			
          


			
		
          
		
				
          
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                          New energy in the 21st century 
            Energy from the wind
             Wind is a kind of clean energy,and there is lots of wind. But if there’s no wind,there is no wind energy.
            Energy from the water
             When water moves from a high place to a lower place,it can make electricity (電) without pollution. However,people have to build dams (水現(xiàn)) to use this energy,and building dams is very expensive.
            Energy from the earth 
             There is heat in the rocks under the earth. Scientists use the heat to make geothermal (地?zé)岬? energy. This kind of energy is cheap,but it is only poSwSible in a few places in the world.
            Energy from the sun 
             Solar panels (太陽(yáng)電池板) on the roofs of houses can turn energy from the sun into electricity. Solar energy is clean and plentiful(豐富的) . But when the weather is bad,it doesn’t work.
            根據(jù)i文內(nèi)容，完成表格。
            New energy in the 21st century
            Sorts of energy  
             
                 Advantages

            Disadvantages

            Wind energy
            Clean. There is a lot of     
                   wind.
            It needs 1 .

            Water energy
            No 2 .


            It is expensive to build dams.


            Geothermal 

             
             energy
             3 .


            It’s only 4 in a few places.

            Solar energy

            Clean and plentiful.


            It depends too much on(太依賴(lài)于） 5 .



            1.2.	3.4. 5. 	
          

			
          

			
          
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