骨性鼻中隔由什么构成?鼻腔外侧壁上主要有哪些结构?
参考答案:
骨性鼻中隔由犁骨和筛骨的垂直板构成;鼻腔外侧壁上有上、中、下3个鼻甲,及上中下开道和副鼻窦的开口。
Look and judge. 看图,判断正(T)误(F)。
1.This country is Canada. The capital city of Canada is Canberra. They speak English. ( )
2.This country is the U. K. The capital city of the U. K. is London. ( )
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4.This is south. South points down. ( )
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社会保障