“Life is like walking in the snow，”Granny used to say，“because every step ________.”(2012·新课标全国)

A．has shown

B．is showing

C．shows

D．showed

巨幼细胞性贫血属于（）.

A.正常细胞不均一性贫血

B.正常细胞均一性贫血

C.大细胞不均一性贫血

D.小细胞不均一性贫血

E.小细胞均一性贫血