In review of 44 studies, American researchers found that men and women who
ate six key foods daily cut the risk of ______ heart disease by 76%.
A.a; the
B.the; a
C.a; 不填
D.不填; a
车站的调车工作由车站()统一领导。
A.调度员
B.调车长
C.分管站长
D.站长