单项选择题

According to the passage, speech is commonly thought of as ______.

A．a method of communicable based on sounds
B．a substitute for oral methods of communicable
C．the least common method of communicable
D．an inferior method of communication

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热门试题

单项选择题

An effort to increase the loudness of the silbo ______.

A．results in a lower degree of articulation
B．is impossible because of the wind
C．exhausts the silbador
D．does not affect its intelligibility

单项选择题

Of the followings, which is NOT mentioned as one of the factors making the silbo superior to speech at long distance

A．There are no transients and overtones to be lost.
B．The silbo is superior to visual "code" and is as rapid as spoken Spanish.
C．The quality is limited by many variables.
D．Articulation does not suffer when loudness is increase