题干

呼吸道不仅能保证气体顺畅通过,还能对吸入的气体进行处理.下列对呼吸道结构和功能的叙述,错误的是(    )

A:呼吸道有骨和软骨做支架,保证了气流通畅

B:鼻腔内的鼻毛和黏液在阻挡灰尘、细菌时形成痰

C:吞咽食物时,会厌软骨会遮住喉口,以免食物进入气管

D:鼻腔黏膜中丰富的毛细血管可以使吸入的空气变得温暖

上一题 下一题 0.0难度 选择题 更新时间:2017-11-01 09:56:15

答案(点此获取答案解析)

B

同类题2

阅读理解。

     As the years go by, the Italian community has found its place in Australia. One of the main reasons is the birth of a second generation(代). The children of migrants(移民) have grown up as Australians.

    Lucy's family is an example.

    Lucy's parents came from Italy in the1950s. Lucy was born in Sydney soon after her parents arrived in Australia. Lucy's parents were both workers. They spoke Italian at home. When Lucy went to school she had to learn English. Her mum and dad could speak just a little English. Athome it was always Italian. When she got a bit older, her mum and dad would askher to help them out when they didn't understand something in English.

    When she was growing up, her parentsdidn't allow her to do as much as her Australian friends. Her friends didn't understand why she couldn't go out and do things with them, or why she alwaysdid what her parents wanted! Lucy's parents spent a lot of time with otherItalians, mainly because it was much easier for them to communicate in Italian. Because of this, she spent more time with kids from Italian background.

     Things have changed since Lucy had children of her own. Lucy is not as strict as her parents were, so her own kids have more freedom(自由). They can move between the different cultures and feel easier in both cultures. They haven't had so many problems about their identities(身份). They see themselves as Australians with an Italian background and they're proud of their traditions.