适宜老年人睡眠的环境声音宜控制在（）。|国开题库

[单选题]适宜老年人睡眠的环境声音宜控制在（）。

国开题库

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2023-09-29 21:39:56

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19

[单选题]适宜老年人睡眠的环境声音宜控制在（）。

A.30分贝以内
B.40～50分贝之间
C.55～60分贝之间
D.30～40分贝之间
E.50分贝以内

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