A. living mechanisms and their artificial imitations B. the remarkable sonar system of bats C. the deficiencies of man-made sonars D. the experiment of "blind-bats" 参考答案:B 答案解析:[分析] 本题为综合考查题。参见原文:There is no better illustration of this idea than the sonar system of bats.接下来对蝙蝠