再生障碍性贫血是造血干细胞和造血微环境的损害所致的贫血。()
参考答案：对
Just a minute! My brother________ his car in the garden.
A．washes
B．is washing
C．washed
D．will wash
烟草专卖管理人员被收回检查证的，主要有哪几类情形？
