大学职业资格刷题搜题APP
创建自己的小题库
搜索
【单选题】
⼈类听觉的适宜刺激是频率（ ）赫兹的声波。
A.
200～20000
B.
1000～4000
C.
16～20000 47
D.
1000～5000
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈
收藏
举报
参考答案：
举一反三
【单选题】下列哪种波长的电磁波为人眼的适宜刺激（）。
A.
<400nm
B.
>400nm
C.
>700nm
D.
400～700nm
E.
370～740nm
【单选题】Every year television stations receive hundreds of complaints about the loudness of advertisements. However, federal rules forbid the practice of making ads louder than the programming. In addition, t...
A.
TV stations always operate at the highest sound levels
B.
their sound levels are kept around peak levels
C.
their sound levels are kept in the middle frequency ranges
D.
unlike regular programs their intensity of sound varies over a wide range
相关题目：
【单选题】下列哪种波长的电磁波为人眼的适宜刺激（）。
A.
<400nm
B.
>400nm
C.
>700nm
D.
400～700nm
E.
370～740nm
【单选题】Every year television stations receive hundreds of complaints about the loudness of advertisements. However, federal rules forbid the practice of making ads louder than the programming. In addition, t...
A.
TV stations always operate at the highest sound levels
B.
their sound levels are kept around peak levels
C.
their sound levels are kept in the middle frequency ranges
D.
unlike regular programs their intensity of sound varies over a wide range
参考解析：
题目纠错 0
发布
