问题 单项选择题

新生儿,男,3天,因心率快、呼吸急促、发绀2天入院。初诊为宫内感染。此时新生儿脐血中哪种免疫球蛋白水平增高()

A.IgG

B.IgD

C.IgM

D.IgE

E.IgA

答案

参考答案:C

解析:抗原刺激机体后,IgM是体液免疫应答中最先产生的抗体,其升高说明近期感染。由于IgM分子量大不能通过胎盘屏障,故新生儿脐血中升高提示宫内感染。

阅读理解

阅读理解。

     Are you interested in country music? I like it very much! It will take me away for a while after I am

tired. The guitars and songs will take me to mountains and fields.

     Country music usually talks of everyday life and feelings. It's the spirit of America, easy to understand,

slow and simple.

      Country music developed in the Southern United States. It was the folk music of American

countryside. Many of songs tell about the lives of farmers.They talk about love, crops or death.

      The life of the countryside can be hard, so the words in country music are often sad. At first, people

played the music only at family parties. But it became more popular later. In the 1920s, people played

country songs on the radio, and they made them into records.

     When people in the countryside moved to towns and cities to look for work, they took their music

with them. Country music continued to change and became popular across America.

     John Denver was one of America's most famous country singers in the 1970s. His song "Take Me

home, Country Roads" is well-known and people still play it today.

1. Country music is usually about _____. [ ]

A. everyday life and feelings

B. farmers' feelings

C. the lives of workers

2. Country music developed _____. [ ]

A. in John Denver's city

B. in the Southern United States

C. in the Northern United States

3. People began to make country song records _____.[ ]

A. in the 1920s

B. in 1920

C. in the 1970s

4. Why did Country music become popular in America? [ ]

A. Because city people liked the music.

B. Because farmers moved to cities with their music and it continued to change.

C. Because country music talked about city people's lives.

5. Who is famous for the song "Take Me Home, Country Roads"? [ ]

A. A farmer in the countryside.

B. A person who moved to towns.

C. John Denver.

选择题