it's close - maybe you didn't count the one that finishes cirlcling the globe in
所有跟贴·加跟贴·新语丝读书论坛
送交者: 匆匆过客 于 2006-09-29, 14:16:33:
回答: my answer is 6 planes. is that correct? 由 wavelet 于 2006-09-29, 14:14:00:
7 is the answer I have at hand.
所有跟贴:
加跟贴