Headset stereos can ______. According the experts, when headset sound reaches 110 decibcls, it can be used at most for ______.

admin2014-02-19  40

问题 Headset stereos can ______.
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
转载请注明原文地址:https://kaotiyun.com/show/LugK777K
0

最新回复(0)