—Mike, how about your journey to Mount Huang?—Everything was wonderful except that our car_________ once on the way.
A:broke into
B:broke down
C:turned into
D:turned down
如图为人体内某结构的血流情况示意图,B代表某结构,A、C代表与其相连的血管,箭头代表血流方向.请据图回答问题: