日韩亚洲一区中文字幕,日韩欧美三级中文字幕在线,国产伦精品一区二区三区,免费在线欧美性爱链接

      1. <sub id="o5kww"></sub>
        
<legend id="o5kww"></legend>
        <style id="o5kww"><abbr id="o5kww"></abbr></style>
        <strong id="o5kww"><u id="o5kww"></u></strong>
        

        2. 


          
	
          
		
	
          
	
          
		
          
			
		
          
		
          
	
          

          



          

          

          


          

          
	
          
				
          

			
				5．A．look  the same     B．look  out           C．look  different(二)錄音中有五個(gè)句子.每個(gè)句子聽一遍.然后從每小題A.B.C中選出適合每個(gè)句子的答語.			【查看更多】
			


		
           
          


		
          
		
          題目列表(包括答案和解析)
          

		
		
          

          


          
	
          				
          
									
          

          　　When a tornado destroys a house, it doesn’t blow it down the way a hurricane（十二級(jí)臺(tái)風(fēng)）does. It makes the house explode（爆炸）. When air that surrounds a house presses against it all time, it usually has a force of about 15 pounds per square inch. The air inside the house presses out against the walks just as hard. When a tornado passes over a house, it suddenly sucks away the air outside the house. The air inside the house still pushes out against the walls. But now there is nothing pushing back. So the walls are pushed out in an explosion. Pieces of the house are sucked up into the tornado and carried away. There is little left where the house once stood.
          

          (1) A tornado causes a house to ________.
          

          [　　]
          
          

          

          

          A．explode
          		


          B．shake
          		


          C．fall down
          		

          

          

          

          (2) The walls of a house stay when ________.
          

          [　　]
          

          A．air pushes from the outside
          

          B．air pushes from the inside
          

          C．there is a different kind of pressure
          

          (3) The air pressure outside the house is usually ________.
          

          A．greater than the air pressure inside
          

          B．the same as the air pressure inside
          

          C．less than the air pressure inside
          

          (4) The walls of a house are pushed out when ________.
          

          [　　]
          

          A．the air outside is taken away
          

          B．the air inside is taken away
          

          C．too much air is pushing outside
          

          (5) A house destroyed by a tornado would look ________.
          

          [　　]
          

          A．as if there had been a fire
          

          B．like a pile of wood
          

          C．as if a bomb（炸彈）had exploded in it
          

			
          
				查看答案和解析>>
			
          
		
          
						
          
				
          
	
          
	
          
		
          


          同步練習(xí)冊(cè)答案