(2013·福建三明三校第一次联考)At the meeting the chairman appealed to us to take ______ full advantage of the chance of hosting the coming YOG to create ________ better Nanjing.

A．a; a

B．the; /

C．/; /

D．/; a

发生溶血性贫血时，红细胞的半衰期常小于（）

A.10天

B.15天

C.20天

D.25天

E.32天