外周血可出现泪滴形红细胞的是（）

A.巨幼细胞性贫血

B.骨髓纤维化

C.缺铁性贫血

D.弥散性血管内凝血贫血

E.急性白血病

Co-operation or teamwork, the importance of which is often ________, plays an important part in football matches.

A．stressed

B．thought of

C．paid much attention

D．talked