根据细胞分布和细胞动力学特点，粒细胞可分为（）池、（）池、（）、池、（）池和（）池五个部分。
参考答案：分裂；成熟；贮存；循环；边缘
一个三位小数按四舍五入法取近似值后是2.64，这个三位小数最大可能是______，最小可能是______．
--Have you ever seen Peter recently?
--Yes. He _________ me to ask you how you ___________along with your new job these days.
A．has asked; have been getting
B．asked; were getting
C．often asks; are getting
D．asked; are getting
