问题
单项选择题
参与免疫调节的免疫细胞和免疫分子是
A．抗独特型抗体和独特型网络
B．补体
C．T、B淋巴细胞、巨噬细胞、NK细胞及细胞因子
D．MHC分子
E．以上都对
答案
参考答案：E
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参与免疫调节的免疫细胞和免疫分子是
A．抗独特型抗体和独特型网络
B．补体
C．T、B淋巴细胞、巨噬细胞、NK细胞及细胞因子
D．MHC分子
E．以上都对
参考答案：E
| 完形填空. | ||||
| Kate is a student in a middle school. She is __1__ building a new zoo in their town. She thinks that __2__ are terrible places for animals to live in. She has visited a lot of zoos __3__ her life, and she has never seen one she liked or one that was __4__ for animals to live in. Just last week, she visited a zoo and couldn't believe what she __5__. The __6__ are kept in tiny cages and can __7__ move at all. However, Alice thinks zoos are very important places. They are like __8__ textbooks for young people. They provide many endangered animals __9__ homes, and help to educate __10__ about caring for them. | ||||
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