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【多选题】

普规规定:听觉信号:( )的鸣笛声。

A.
号角
B.
口笛
C.
响墩发出的音响
D.
机车、自轮运转特种设备
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题目标签:信号听觉
参考答案:
参考解析:
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举一反三

【单选题】人的听觉产生于()

A.
听觉感受器
B.
耳蜗
C.
鼓膜
D.
大脑听觉中枢

【单选题】听觉语音加强见于 ( )

A.
肺实变
B.
胸膜增厚
C.
肺气肿
D.
阻塞性肺不张
E.
以上都是

【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

【单选题】13C - NMR中,C-3的信号在δ136左右的是

A.
二氢黄酮
B.
二氢黄酮醇
C.
黄酮醇
D.
异黄酮
E.
黄酮