问题
单项选择题 A1型题
再生障碍性贫血的发生机制是（）
A.造血原料缺乏
B.骨髓造血功能低下
C.急性失血
D.严重感染
E.红细胞破坏
答案
参考答案：B
解析：再生障碍性贫血由于多种原因导致骨髓造血功能衰竭，以骨髓造血干细胞及造血微环境损伤、外周血全血细胞减少为特征。【该题针对“贫血”知识点进行考核】
搜题请搜索小程序“爱下问搜题”
再生障碍性贫血的发生机制是（）
A.造血原料缺乏
B.骨髓造血功能低下
C.急性失血
D.严重感染
E.红细胞破坏
参考答案：B
解析：再生障碍性贫血由于多种原因导致骨髓造血功能衰竭，以骨髓造血干细胞及造血微环境损伤、外周血全血细胞减少为特征。【该题针对“贫血”知识点进行考核】
| 读短文，将下面的动物、国家与特征搭配。 Welcome to our zoo! Now please let me introduce the animals here to you. The elephant here is from India. She is strong and heavy. She eats grass every day and she is only five years old. The dolphin comes from China. She likes swimming very much and she is friendly to people. The lion is from Africa. It’s very lazy and it sleeps 20 hours a day! The koala bear is from Australia. It is cute. Be careful! The Brazil tiger is dangerous! Enjoy yourselves! | |||
|