现有95%乙醇500ml,要配制70%乙醇,需加入灭菌蒸馏水A.155ml B

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问题 现有95%乙醇500ml,要配制70%乙醇,需加入灭菌蒸馏水A.155mlB.165mlC.178mlD.185mlE.195ml

选项 A.155ml
B.165ml
C.178ml
D.185ml
E.195ml

答案 C

解析
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