题干
China won 32 gold medals in the 2004 Olympic Games, _____ second among all the competing countries.
A：ranked
B：to rank
C：to be ranking
D：ranking
答案(点此获取答案解析）
D
2SO3(g)，在相同温度下达到平衡。若甲容器保持体积不变，乙容器保持压强不变，测得甲容器中SO2的转化率为25%，则下列说法中正确的是