骨髓内巨幼红细胞于肌注维生素B后_____小时即可转为正常幼红细胞。
参考答案：6～7
Look! They their car. [ ]
A. are geting on
B. are getting on
C. are geting into
D. are getting into
土地资源可持续利用包含土地资源合理配置和土地资源充分利用两个方面。( )
