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阅读理解 阅读下面短文，短文后有5道题。请根据短文内容，为每题确定1个最佳选项。 Chronic Diseases:The Worlds Leading Killer Chronic diseases are the leading cause of death in the world.Yet health experts say these conditions are often the most preventable.Chronic diseases include heart disease,stroke,cancer,diabetes(糖尿病)and lung disorders. The World Health Organization says chronic diseases lead to about seventeen million early deaths each year.This United Nations agency expects more than three hundred eighty million people to die of chronic diseases by two thousand fifteen.It says about eighty percent of the deaths will happen in developing nations. The WHO says chronic diseases now cause two-thirds of all deaths in the Asia-Pacific area.In ten years it could be almost three-fourths.People are getting sick in their most economically productive years.In fact,experts say chronic diseases are killing more middle-aged people in poorer countries than in wealthier ones. The WHO estimates that chronic diseases will cost China alone more than five hundred thousand million dollars in the next ten years.That estimate represents the costs of medical treatment and lost productivity.Russia and lndia are also expected to face huge economic losses. Kim Hak-Su is the head of the United Nations Economic and Social Commission for Asia and the Pacific.Last ween in Bangkok he presented a WHO report on the problem.It says deaths from chronic diseases have increased largely as the result of economic gains in many countries. | 
