造血干细胞和造血微环境的损害所致的贫血是( )"相关专业知识"
A. 再生障碍性贫血
B. 巨幼细胞性贫血
C. 缺铁性贫血
D. 溶血性贫血
E. 遗传性球形红细胞增多症
Withayear’shardwork,he_________basicknowledgeofEnglish.
A. hascaught
B. hasacquired
C. hasrequired
D. hasacknowledged
Thephysicsteachersaidthattheearth_________aroundthesun.
A. moves
B. ismoving
C. moved
D. hadmoved
Ihavenoone_________me,soIhavetodealwithitmyself.
A. help
B. tohelp
C. helped
D. tohavehelped