选择题：

1. 选择题

　　题目：The United Nations defines an aging society ______ one that has 10 percent or more of the population aged 60 or over.

　　A) as

　　B) is

　　C) like

　　D) for

　　答案解析：A) as

　　解析：在英语中，"defines as"是一个常见的表达方式，用来说明定义的对象或范围。因此，正确答案为A) as。

　　填空题：

2. 填空题

　　题目：According to the United Nations, an aging society is characterized by having ______ percent or more of its population aged 60 or over.

　　答案解析：10

　　解析：根据题目中提到的信息，根据联合国的定义，一个老龄化社会的标志就是有10%或更多的人口年龄在60岁或以上。

　　判断题：

3. 判断题

　　题目：An aging society is determined by the percentage of the population aged 70 or over.

　　A) True

　　B) False

　　答案解析：B) False

　　解析：根据联合国的定义，老龄化社会的标准是60岁或以上的人口占总人口的百分比，而不是70岁或以上。

　　论述题：

4. 论述题

　　题目：Discuss the potential impact of an aging society on healthcare and social services.

　　答案解析：An aging society can have a significant impact on healthcare and social services in several ways. Firstly, there will be an increased demand for healthcare services as the elderly population grows, leading to potential strains on healthcare systems and resources. Additionally, there may be a need for specialized care for age-related conditions, such as dementia and mobility issues, which could require additional training for healthcare professionals and investment in specialized facilities.

　　Furthermore, an aging society may also place pressure on social services, such as elder care programs and support services for retirees. The need for affordable housing, social activities, and community support networks for the elderly may increase, necessitating adjustments in social service provision and funding.

　　Overall, an aging society presents challenges and opportunities for the healthcare and social service sectors, requiring proactive planning and investment to meet the evolving needs of an older population.

　　希望这些题目和答案能够帮助到你。

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