A-A+
Generally it isnt harmful to our ears when sounds are up to______.A．140 decibelsB．100 dec
问题详情
Generally it isnt harmful to our ears, when sounds are up to______.
A．140 decibels
B．100 decibels
C．80 decibels
D．160 decibels
请帮忙给出正确答案和分析，谢谢！
考点：
