题目

Each time Chinese New Year is approaching, preparations are underway around the world. Here are some Chinatowns for those outside of China wishing to mark the day.LondonAlthough it may not be as large or as long-built as others, having only become a center for the Chinese community during the 1950s, London’s Chinatown is perfectly formed little firework that knows how to see in the year with a bang. Decorated with red lanterns, previous years have seen shows with acrobatics（杂技）, martial arts（武术）,dance and opera nearby.San FranciscoSan Francisco’s Chinatown is perhaps the mo定义在上的函数；当时，，若，，则P，Q，R的大小关系为（   ）A．R＞Q＞PB．R＞P＞QC．P＞R＞QD．Q＞P＞R