问题
单项选择题
关于免疫的叙述正确的是( )
A.机体抗感染的能力
B.机体识别和清除自身突变细胞的能力
C.机体对病原微生物的消除能力
D.机体清除自身衰老死亡细胞的能力
E.机体识别和排除抗原性异物的过程
答案
参考答案:E
解析: 免疫是指机体识别和排除抗原性异物。
关于免疫的叙述正确的是( )
A.机体抗感染的能力
B.机体识别和清除自身突变细胞的能力
C.机体对病原微生物的消除能力
D.机体清除自身衰老死亡细胞的能力
E.机体识别和排除抗原性异物的过程
参考答案:E
解析: 免疫是指机体识别和排除抗原性异物。
完形填空。 | |||
Mary is an English girl. She is 13 years old .She's always 1 blue coat. Now she 2 in a middle school in Shanghai. 3 father and mother 4 in China, too. They are both 5 . They teach English in a college (大学). 6 do they do on Sundays? They often go to the park 7 Sunday morning. Mary likes Chinese food very much, 8 she doesn't like Chinese tea. Mary likes 9 a lot . She has a pet dog at home. Its name is Kitty. 10 are good friends. They are often together on Sundays. | |||
|