问题 单项选择题 A1/A2型题

某人血浆中含有抗A,抗B凝集素,则此人的血型可能是()。

A.A1型

B.B型

C.AB型

D.A2B型

E.O型

答案

参考答案:E

解析:ABO血型的分型及其物质基础ABO血型是根据红细胞膜上存在的凝集原A与凝集原B的情况而将血液分为4型。凡红细胞只含A凝集原的,即称A型;如存在B凝集原的,称为B型;若A与B两种凝集原都有的称为AB型;这两种凝集原都没有的,则称为O型。不同血型的人的血清中各含有不同的凝集素,即不含有对抗内他自身红细胞凝集原的凝集素。在A型人的血清中,只含有抗B凝集素;B型人的血清中,只含有抗A凝集素;AB型人的血清中没有抗A和抗B凝集素;而O型人的血清中则含有抗A和抗B凝集素。

阅读理解

Every day when I enter the classroom, I will take a look at the wall beside my seat. You will find nothing special about this old wall if you just look at it. But for the students in my class, it is a special wall. Take a good look at it, and you will get to know the real feelings and thoughts of us, the 9th graders.

In the middle of the wall, there is a big “VICTORY”. It was written in pencil. I guess it must have been written by someone who got a good mark in an exam.

A little higher above the formulas, there is a poem. It only has two sentences. It reads: All those sweet memories have disappeared. Like tears dropping in the heavy rain.

Oh! It must have been written at the end of the last semester in middle school. Classmates had to leave school and good friends had to part. What a sad poem!

If you look at the wall more carefully, you will find many other interesting things, like a crying face, or a happy face, and other patterns(图案). There are still some patterns and letters that I can’t understand, but they all show the feeling of the students who drew them.

For years, the wall has witnessed(目睹) all the things that have happened in the classroom. I don’t know how it will be next year, two years from now, or even ten years from now. But I hope more smiling faces will be drawn on it.

小题1:There is ____ special on this wall.

A.something

B.anything

C.nothing

D.everything小题2:What was the “VICTORY” written in?

A.Chalk

B.Pencil

C.Pen

D.Brush小题3:When has the poem been written?

A.At the beginning of the last semester.

B.At the end of the year.

C.At the end of the last semester.

D.At the beginning of the last month.小题4:What’s the meaning of the underlined word?

A.部分

B.分离

C.和好

D.聚集小题5:What’s the title of the passage?

A.The Pictures of the Wall

B.The Feelings of the Students

C.The Patterns of the Classroom

D.The Hope of the Writer

选择题