第32题: [单项选择]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 参考答案:D 答案解析:细节题。最后一段说明如果能听到口哨,那么它的音质几乎是纯正且不发生变化。因此,silbo在两方面优于大声讲话。第一点,用力吹哨,增大哨音时,不管怎样,哨音还很清晰。