—Hey,Kelin.Happy New Year! ___________?

—OK,I guess.My grandma kept cooking and cooking,so I just kept eating.

A．How was your break

B．How is your grandma

C．Where did you go for holiday

D．What did you do in your holiday

关于血红蛋白下列哪项错误（）

A.是成熟红细胞的主要蛋白质

B.有两对珠蛋白肽链和4个亚铁血红素分子构成

C.正常成人血红蛋白有HbA、HbA和HbF三种

D.血红蛋白全部在有核红细胞期合成

E.约35％合成于网织红细胞阶段