题目

When six the very best students from different cities in Guandong province all together chose universities in Hong Kong; when the very best student of Beijing picked up HK University while giving up the nearby Peking or Tsinghua University; when the highest enrollment （录取）rate of Hong Kong Science and Industry University reached 48:1, it’s the high time to ask where the real education heaven for students in China is.Years ago, the answer certainly would be “Peking or Tsinghua University”. But now no one could give the exact reaction without hesitation. The only sure thing is that若=3∶5∶5，则m，n的值分别为（　） A．m=5，n=2　　　　    B．m=5，n=5　　　　    C．m=2，n=5　　　　    D．m=4，n=4