问题 单项选择题

放射免疫显像(RII)中,放射性核素标记的抗体在肿瘤组织中聚集,其原因有()。

A.肿瘤微环境毛细血管通透性增加

B.肿瘤局部淋巴回流系统缺乏

C.抗原抗体特异性结合

D.肿瘤血供丰富

E.以上均是

答案

参考答案:E

解析:RII中,放射性核素标记的抗体在肿瘤组织中聚集和下述因素相关:肿瘤微环境毛细血管通透性增加、抗原抗体特异性结合、肿瘤局部淋巴回流系统缺乏及肿瘤血供丰富等,故本题答案为E。

阅读理解

阅读理解。

     Long, long ago, seven colors were arguing about who was the most important color.

     Red said, "I am the ruler of all of you. I represent blood-life's blood! Without me, the world would be

empty." Orange said,"I am the color of health and strength. I am so beautiful that no one can think of any

of you." Yellow said, "I bring laughter and warmth into the world. Without me, there would be no fun."

     Green said, "I am the most important. I am the sign of life and hope. Without me, all animals would die."

Blue said,"You only think about the earth, but forget the sky and the sea. Water is the basis of life. Without

me, you all would be nothing." Purple said,"I am the color of royalty, power and wisdom. People usually

listen to me." Indigo (靛蓝) finally said, "Don't forget me! I am the color of silence. You need me for balance."

     Suddenly, it started to rain. The colors were afraid and came close to one another. The rain saw this and

said,"You foolish colors, don't quarrel (争吵) any more. Join hands with one another and come to me."Doing

as they were told, the colors united and joined hands. A beautiful rainbow appeared in the sky. The rain said,

"The rainbow is a sign of hope for tomorrow. Let us remember today and appreciate (欣赏) one another."

1. Of all the ___________ colors, everyone wanted to be the most __________ one.

2. Red thought there would be ___________ in the world ___________ him.

3. ___________ thought he himself was the color of ___________ and happiness.

4. In the end the rain ___________ the colors ___________ quarrelling.

5. From the story, we can learn that we should ___________ together and ___________ and enjoy the

   good qualities of each other.

填空题