The invention of artificial hearts marked a turning point in the battle heart disease.
A. among
B. for
C. against
D. between
网友回答
A. among
B. for
(答案→)C. against
D. between
解析：C 句义：人造心脏的发明标志着同心脏病做斗争的一个转折点。考察介词，against逆着，对着，反对；the battle against heart diease。