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Headset stereos can ______. [br] According the experts, when headset sound reach
Headset stereos can ______. [br] According the experts, when headset sound reach
游客
2023-10-04
31
管理
问题
Headset stereos can ______. [br] According the experts, when headset sound reaches 110 decibcls, it can be used at most for ______.
选项
A、one hour
B、half an hour
C、two hours
D、three hours
答案
B
解析
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