左主支气管的特点（）
A. 较长而横平
B. 较粗而垂直
C. 较细而垂直
D. 较短而横平
E. 较短而垂直
喉腔最狭窄的部位是（）
A. 喉前庭
B. 喉室
C. 前庭裂
D. 声门裂
E. 喉中间隔
I picked up the stones one ______ and appreciated their beauty.
She faces the ________ of disobeying her father or losing the man she loves.
A. foundation
B. fundamental
C. funding
D. fundamentally
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