S$89,530／13＝6886，太低啦?

来源: cherrylover 于 2012-06-24 20:52:30 [旧帖] [给我悄悄话] 本文已被阅读：次

该除以12而不是除以13，这样算下来不低。跟美国理科的差不多

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