在△ABC中,a∶b∶c=3∶5∶7,则此三角形的最大内角是( ).
A:150°
B:120°
C:90°
D:135°
Although at the age of 30 and much older than the other players, Zhang Ning __________ to win the gold medal in the final match.
下面两幅图片反映的历史事件是中国解决历史遗留问题的成功范例。它践行了( )