婴幼儿鼻咽部感染易引起中耳炎的主要原因是 ( )
A.鼻咽部黏膜柔嫩,血管丰富
B.咽鼓管相对宽、直、短
C.喉腔狭小,黏膜桑嫩
D.呼吸道局部IgA少
正确答案是B
扫描二维码免费使用微信小程序搜题/刷题/查看解析。
版权声明:本文由翰林刷题小程序授权发布,如需转载请注明出处。
本文链接:https://doc.20230611.cn/post/424445.html
上一篇:如厕环节的保育可以从哪些方而着手?
下一篇:Once, when Japan faced pressure from abroad, it would either give in reluctantly or keep quiet and hope that the fuss would die down. No longer, it seems. The Clinton administration strongly believes in exerting such pressure. Its policy is to open s