造血调控包括()调控和()调控,它们以不同的方式共同调控造血细胞的增生、分化、成熟和凋亡等过程,以达到维持正常造血平衡的目的。
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造血微环境的组成包括以下哪些?
A. 骨髓基质细胞
B. 微血管
C. 细胞外基质
D. 细胞因子
1four years in America, Li Zimo has 2to become so 3 in English that she doesn't even have a foreign 4. She has won many5, and has even written a book about her experiences in learning English."You are not the only person feeling 6when making mistakes." She said when she 7."The 8in learning a second language can be difficult. Everyone makes mistakes.But you can9 those mistakes10 a big step toward your success."In her book, she told us her three "terrible" 11. All these tell us you have to 12learn the language, and never 13making mistakes.Let's 14 Li's book!
信用信息管理系统的四个功能是()
A. 征集
B. 整合
C. 服务
D. 监管
个人征信数据库代表性的是美国的三家信用局所建立的征信数据库。艾可飞公司(Equifax)、环联公司(Trans Union)、益百利公司(Experian)。
A. 对
B. 错