关于发展国家的卫生状部问题

水滴英语 2010-05-06

这个图告诉我们，在1960年至1990年发展中国家在预期寿命和婴儿死亡率的变化。我们可以看到，在1960年的预期寿命约为40年，而在1990年，则上升至约60年。在此期间，婴儿死亡率下降至20off00到10off00。

这些变化有许多原因。首先，由于在科学和医学的进步，人们接受更好的医疗保健服务比以前。其次，随着经济的发展，人们开始了今天更好。

因此，他们可以很重视自己的饮食。第三，由于环境的保护提高认识，采取措施解决污染问题。所有这些都是有利于人们的健康，这当然是延长其寿命。

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本文标签：大学英语作文国家人们问题
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发布日期：2010-05-06
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