问题 单项选择题

将小鼠B细胞注入家兔体内,产生免疫反应后,家兔血清能使小鼠T细胞凝集成细胞集团。而未经免疫的家兔血清不能使小鼠T细胞凝集成团。T细胞凝集现象的出现是因为()

A.小鼠B细胞诱导家兔产生细胞免疫

B.小鼠T细胞诱导家兔产生体液免痊

C.小鼠B细胞和小鼠T细胞有相同抗原

D.小鼠T细胞和家兔T细胞有相同抗原

答案

参考答案:C

解析:小鼠B细胞注入家兔的体内,产生免疫反应后,在家兔的血清中可以找到相应的抗体。而血清也可以和小鼠T细胞凝集,根据抗原和抗体之间的特异性结合特点来看,说明小鼠的B细胞和小鼠T细胞具有相同的抗原;选C。考点:特异性免疫。点评:试题以信息的方式呈现考生陌生的问题背景,提升了学生获取信息以及运用所学知识解决实际问题的能力。

阅读理解

Good evening, ladies and gentlemen. Welcome to the nine o’clock Mystery Hour. Today we’ll show you two British stories. We hope you’ll enjoy them.

About 900 years ago two green children arrived in a small village in south England. Their eyes and skin were green and they spoke a strange language. They were very tired and weak, so the people of the village looked after them. The boy died a year later, but the girl grew strong and lived the rest of her life there. And her skin colour turned back to normal day by day. Scientists say that sometimes of people don’t have enough food to eat for a long time, their skin goes very pale and can even turn green.

Loch Ness is the largest lake in Scotland. It’s a very deep and cold lake. For hundreds of years, people have talked about a monster(怪物) called Nessie which lives in the lake. About seventy years ago, two people saw something moving in the lake. They said that the animal was playing and rolling around in the water. Since then many people say they have seen the monster. Their descriptions are always the same. It looks like a dinosaur, with a very long neck and a small head. It has a big bump(包,肿块)on its back. People have tried to photograph the animal, but the pictures have not been very clear. Scientists don’t know whether there is a monster or not. Some say it may be a whale or a very large fish. Some think it’s a snake. Others say there’s nothing at all— nothing but people’s imagination. Maybe we’ll never know what’s in Loch Ness.

小题1:What kind of story is talked about in this programme?

A.Romantic stories.

B.Mysteries.

C.Horror stories.

D.Comedies.小题2:Which sentence is TRUE about the two green children?

A.They both enjoyed a long and happy life.

B.The girl’s eyes and skin were green all her life.

C.At first they spoke the same language as people in the small village did.

D.Maybe they hadn’t eaten enough for long before they reached the village.小题3:What does Nessie look like according to some witnesses? 

小题4:What can we learn from the second story?

A.Scientists are still not sure whether there is a monster or not in Loch Ness.

B.Loch Ness is very deep and warm lake in Scotland.

C.People have taken very clear pictures of Nessie.

D.In fact Nessie is a whale or a snake.

选择题