61.  Late , specially those years, with the open of china , the people's living level are rising.

62.  The people's living level was not high.

63.  So the people's living level has been improved since 1960.

64.  There are many reason but the main reason is that the living level of the people was increased in the developing countries.

65.  The third reason is that the developing countries's living level is improving little by little.

66.  On the other hand, people's life level gets improvement .

67.  This is because: The people level of living is improving with the countries ecconomie devoloping .

68.  On the other hand, the curable level in hospital is improving, which make the people stronger and stronger.

69.  The level of life get higher and higher with the development of the socity .

70.  With development of the level of people's lives in the developing coutries , the life expectancy and infant mortality is Decline .