问题 选择题

人体的呼吸系统是由鼻、咽、喉、气管、支气管和肺组成的,而肺是气体交换的主要场所。那么肺泡适于气体交换的特点正确的是(     )

A.肺泡数目很多

B.肺泡外面包绕着丰富的毛细血管

C.肺泡壁和毛细血管壁都由一层上皮细胞构成

D.以上都是

答案

答案:C

题目分析:肺泡壁和缠绕在外面的毛细血管壁都是由一层扁平的上皮细胞组成,这有利于气体穿过管壁,进行气体交换,故选C。

完形填空

完形填空。通读下面两篇短文。根据短文内容,从A B C三个选项中选出可填入空白处的正确答案。(共20小题,每小题1分,计20分)

Last year Tom left school. He came to Taibei to  1  a job. He went from one company to  2 but  3 wanted him. Now he had little money.He had to go back to his small town. So he came to the station. He felt 4 and tired. It was very late at night and  5 was full of people. They were waiting 6 tickets of the last train. He bought the last ticket, and he was happy.

At that time, a woman with a crying a baby walked to him. She asked him to sell her the ticket. He gave her the ticket. He thought they needed it  7 he did. After the train left, he sat on the bench and didn’t know  8  to go. Just then, an old man came and said,“Young man, I saw what happened just now. I have a big company. I need a good young man like 9 . Would you like to work 10 me?”

小题1:A.find                    B. see                 C. look

小题2:A.the other               B. other               C. another

小题3:A.everyone                B. no one              C. nothing

小题4:A.happy                   B. sad                 C. glad

小题5:A.the city                B. the company        C. the station

小题6:A.to buy                  B. to sell             C. to give

小题7:A.less than               B. more than           C. worse than

小题8:A.what                    B. why                 C. where

小题9:A.the woman                B. you                 C. her

小题10:A.with                   B. for                 C. to

问答题 简答题