喉软骨构成结构
参考答案：
不成对的甲状软骨，环状软骨，会厌软骨，和成对的勺状软骨
. Many a student ______ the importance of learning a foreign language.
A．have realized
B．has realize
C．have been realized
D．has been realized
低温容器的铭牌不能直接铆固在壳体上。
