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1123580(½ð±Ò+2): лл£¬ÇëÎÊÕâ¸öSÊÇÔõôȡµÄ£¿ 2011-10-13 12:38:06
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½üËÆÔ²Öù·½³ÌΪX^2/(2+z/3)^2+Y^2(2+Z/6)^2=1
V=¡ÒSdz
ÆäÖÐS=(2+z/3)(2+Z/6)PI
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