营养不良，常见的维生素缺乏症是
A．维生素A缺症B．维生素B缺症C．维生素C缺症D．维生素D缺症E．维生素E缺症
参考答案：A
阅读并判断，正确的画“√”，错误的画“×”。
My name is Jenny. I'm ten years old. My birthday is March tenth. I'm 1.2 metres tall. I live in a house. My
address is 522 Park Road. I'm a Chinese girl. In China, it's cold and snowy in December. I like winter. I can
play with snow.
( ) 1. Jenny is a girl of ten.
( ) 2. Jenny is Chinese.
( ) 3. She isn't 1.2 metres tall.
( ) 4. Her address is 524 Park Road.
( ) 5. Jenny's birthday is May tenth.
有关免疫调节的描述正确的是（）
A.是针对外来病原体的抗感染功能，正常可防御病原体的感染
B.是机体免疫系统识别和清除体内突变、畸变细胞以及被病毒感染细胞的生理性保护作用
C.正常情况下，对自身组织成分不产生免疫应答，处于自身免疫耐受状态
D.参与机体整体功能的调节
E.具有杀灭病原体的作用
