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

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答案(点此获取答案解析)

B

同类题4

阅读表达 阅读下面的短文并用英语回答问题,并将答案写在答题卡上标有题号的横线上。

    The way we spend our time can be. divided into three groups,or jars(罐子).These would be the necessary tasks jar, the voluntary tasks jar and the happiness jar.

    Every day,we spend time filling the necessary tasks jar. We fill this jar with useful things,like making money,doing housework,buying food and paying bills. We then fill another jar with voluntary tasks like taking children to activities and cooking family meals. Those jars are very important,but we may not enjoy them. If we don't fill them each day,our family won't run properly.

    However, we often forget to fill the third jar—the happiness jar. This is the jar that we fill with activities that make us happy. Is your happiness jar sometimes empty at the end of the day? We all have days like that. Between doing all the necessary, and voluntary tasks,time flies by on some days,and before we know it,it is time for bed.

    That is why each day we try to fill our happiness jar. Most days,I fill mine by going to the ballroom dance(社交舞)class. Playing music is another way that I fill my happiness jar. This week,I was happy to take part in an orchestra(管弦乐队)practice at my church(教堂).At the end of the evening, my happiness jar was full.

    Consider how your time is spent. Try to find ways to achieve a balance. At the end of the day,hopefully we've done all we can to make sure that our happiness jar is filled.