问题 单项选择题

婴幼儿易患呼吸道感染的免疫因素是

A.呼吸道黏膜缺少分泌型IgA

B.呼吸道黏膜缺少IgM

C.呼吸道黏膜缺少IgG

D.呼吸道黏膜缺少IgE

E.呼吸道黏膜缺少补体

答案

参考答案:A

解析:婴幼儿体内的免疫球蛋白含量低,尤以分泌型IgA为低,且肺泡巨噬细胞功能不足,乳铁蛋白、溶菌酶、干扰素、补体等数量和活性不足,故易患呼吸道感染。

阅读理解

The day of my holiday arrived, but I wasn’t looking forward to it. I had little money and had only been able to afford to stay with my Aunt Rosa in Spain. So, I wasn’t really excited as I knew exactly what it was going to be like: lots of noisy cousins , and Aunt Rosa begging me to take her for a ride.

After I had checked in, I made my way slowly to the departure gate. As I was waiting to board the plane, I kept thinking about my ideal holiday destination: Jamaica, with its long, sandy beaches and crystal clear water.

As soon as the plane took off, I fell fast asleep and only woke to the sound of the announcement: “Ladies and gentlemen, please fasten you seat belts, as we will shortly be landing in Kingston.” I froze in my seat. Was I dreaming? Kingston? Jamaica? I had boarded the wrong plane!

Immediately after the plane landed, I explained the situation to the authorities. It seems there were also three other passengers heading for Spain. Apparently it had been the airline’s fault, since the flight numbers for Spain and Jamaica were exactly the same! Therefore, with no flight back to London for a week, the airline had no choice but to pay for our stay.

So there I was, lying on the beach, enjoying the music and the marvelous food of Jamaica! As for Aunt Rosa, I suppose she just had to live without me!

小题1:Why did the writer choose to spend her holiday with her aunt in Spain?

A.She missed her cousins very much.

B.Her aunt begged her to go there.

C.She could hardly afford any better trip.

D.Spain was her ideal destination.小题2:In the story, the writer ended up _________.

A.flying to London immediately

B.heading for Spain from Jamaica

C.complaining to the authorities

D.enjoying a free beach holiday小题3:Which of the following might be the best title of the passage?

A.A Lucky Mistake

B.A Terrible Adventure

C.A Nice Dream

D.A Well-Planned Trip

单项选择题 A1/A2型题