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(A) 99.7236 (B) 99.7362 (C) 99.7623 2.ÆÊÃæÏßÇøÓòÖ®Ãæ»ýΪºÎ£¿mm2
(A) 370.7123 (B) 370.7213 (C) 370.7312
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2. ÆÊÃæÏßÇøÓòÖ®Ãæ»ý = 370.7123mm2 £¬¾ÍÊÇ(A)
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