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【单选题】The human voice, like any sound produced by thrumming a stretched string, has a fundamental frequency. For voice, the centre of that frequency lies mostly below 300Hz depending on the speaker"s . I...
A.
reducing noise and amplifying higher-frequency
B.
cutting down noise and enhancing certain frequencies
C.
stressing higher frequencies and impairing lower ones
D.
weakening the frequency range between 300Hz and 6kHz
【单选题】The human voice, like any sound produced by thrumming a stretched string, has a fundamental frequency. For voice, the centre of that frequency lies mostly below 300Hz depending on the speaker"s . I...
A.
Telephone can transmit a wide range of frequencies.
B.
Higher frequencies are more important than lower ones.
C.
People may use many parts of the mouth to utter consonants.
D.
Cutting off higher frequencies will not influence understanding.
相关题目：
【单选题】The human voice, like any sound produced by thrumming a stretched string, has a fundamental frequency. For voice, the centre of that frequency lies mostly below 300Hz depending on the speaker"s . I...
A.
reducing noise and amplifying higher-frequency
B.
cutting down noise and enhancing certain frequencies
C.
stressing higher frequencies and impairing lower ones
D.
weakening the frequency range between 300Hz and 6kHz
【单选题】The human voice, like any sound produced by thrumming a stretched string, has a fundamental frequency. For voice, the centre of that frequency lies mostly below 300Hz depending on the speaker"s . I...
A.
Telephone can transmit a wide range of frequencies.
B.
Higher frequencies are more important than lower ones.
C.
People may use many parts of the mouth to utter consonants.
D.
Cutting off higher frequencies will not influence understanding.
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