Finally the climbers got to________ place which had never been visited by ________ men.

A．a; 不填

B．a; the

C．不填； the

D．the; the

缺铁性贫血的临床表现是

A．心脏有收缩期杂音

B．肝、脾轻度增大

C．口唇苍白

D．手、足、头不自主震颤

E．疲乏无力、食欲减退