2.                     
                            
                
                    
                
                    
        OCW makes the materials used in the teaching of MIT's subjects available on the Web.
         
         
         
        Learn more about how to use OpenCourseWare. Click to get started.
                            
               
           
           
                        
           
          3. 
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http://wap.nhde20.cn |

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http://4g.nhde20.cn |

http://5g.nhde20.cn |

http://mobile.nhde20.cn |

http://vip.nhde20.cn |

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http://anzhuo.nhde20.cn |

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http://2f1.nhde20.cn |

http://18.nhde20.cn |

http://www.nhde20.cn/aae47.html |

http://www.nhde20.cn/e.html |

http://www.nhde20.cn/46397.html |

 很污很细节的性描述