问题
多选题
酿脓链球菌反复感染人体可引起风湿性心脏病。其主要原因是[ ]
A．机体免疫功能低下或缺失
B．外来抗原直接作用于机体某些组织
C．抗体与自身组织发生反应，引起自身免疫疾病
D．外来抗原与自身某些组织细胞有共同的或相似的抗原决定簇
答案
CD
搜题请搜索小程序“爱下问搜题”
酿脓链球菌反复感染人体可引起风湿性心脏病。其主要原因是[ ]
A．机体免疫功能低下或缺失
B．外来抗原直接作用于机体某些组织
C．抗体与自身组织发生反应，引起自身免疫疾病
D．外来抗原与自身某些组织细胞有共同的或相似的抗原决定簇
CD
阅读短文，完成下列表格。 I have many pen pals in many countries. Do you know the girl on the bike in the photo? She is one of my pen pals. Her name is Reiko. She is a Japanese student. We are the same(相同的) age - 13 years old. She lives in Tokyo. She has two brothers. They live with their parents. I like Reiko very much. But I don’t know Japanese, and Reiko doesn’t know Chinese, either(也). But we know English. So we write letters in English. Sometimes(有时) we talk on the phone. My favorite subject is math. Her favorite subject is music. We have the same hobbies. We like seeing comedies, playing volleyball and eating hamburgers. My pen pal
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