问题
多项选择题
气管的特点是（）
A、长约9-12cm
B、位于食管后方
C、位于食管前方
D、由软骨和骨组成
答案
参考答案：A, C
搜题请搜索小程序“爱下问搜题”
气管的特点是（）
A、长约9-12cm
B、位于食管后方
C、位于食管前方
D、由软骨和骨组成
参考答案：A, C
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