下列贫血属于正常细胞性的是（）

A.慢性感染性贫血

B.缺铁性贫血

C.再生障碍性贫血

D.铁粒幼细胞性贫血

E.海洋性贫血

.Young________, he already knows what career he wants to follow.

A．though is he

B．though he is

C．he is though

D．is he though