题目内容：
会厌软骨的作用是( )。
A.阻挡灰尘
B.阻止异物入喉
C.振动发音
D.颈部的重要标志
E.防止呼吸道感染
参考答案：
答案解析：
选择题：会厌软骨的作用是( )。
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关于肘关节下列说法错误的是( )。
关于肘关节下列说法错误的是( )。
骨盆出口横径是( )
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能屈髋关节又能伸膝关节的肌肉是( )。
能屈髋关节又能伸膝关节的肌肉是( )。
Emily Dickinson was regarded mainly as a( n) ( )
Emily Dickinson was regarded mainly as a( n) ( )
Science is a dominant theme in our culture. Since it touches almost every facet
Science is a dominant theme in our culture. Since it touches almost every facet of our life, educate