國一數學(比例式) - 酒精
By Ina
at 2015-04-11T00:00
at 2015-04-11T00:00
Table of Contents
1、小均將濃度90%的藥用酒精750c.c.加入蒸鎦水後,調配成濃度75%的消毒用酒精,則小均需加入多少c.c.的蒸鎦水?2、小恩將濃度15%的食鹽水80公克加水稀釋成濃度8%的食鹽水,則小恩需加入多少公克的水?3、若x+2y分之3x-4y=2分之1,則2x+y分之3x-y=_。4、食鹽重量與食鹽水重量的比值稱為食鹽水的濃度,若甲食鹽��
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酒精
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By Aaliyah
at 2015-04-13T17:30
at 2015-04-13T17:30
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