【单选题】【消耗次数：1】
老年人居室向阳的原因为（ ）。
①
充足的阳光能预防老年骨质疏松症
②
紫外线消毒，预防疾病
③
红外线使血管扩张，改善皮肤营养状况
④
以上均对
参考答案：
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【单选题】
阳光中的紫外线照射到皮肤上可生成( )。
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【单选题】
使老年人居室宁静的措施有（ ）。
①
可以紧邻公园
②
房间颜色忌用红、橙、黄色等让人兴奋的颜色
③
易产生噪音的家电放在老人的房间里，但要远离老人
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房间的颜色可以用深色
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