My cousin enjoys ______with her mother . [ ]
A. to say
B. talking
C. to talk
D. saying
答案:B
A.I有=3/2A,Im=3A
B.I有=3A,I有=3A
C.I有= A,I有 A
D.I有3A,Im=6A
治疗慢性失血引起的贫血选用().
A.维生素B12
B.叶酸
C.硫酸亚铁
D.红细胞生成素
E.粒细胞集落刺激因子