单选题:在浓度为40%的酒精中加入4千克水,浓度变为30%,再加入m千克纯酒精,浓度变为50%,则m为多少? 题目分类:行政能力 题目类型:单选题 查看权限:VIP 题目内容: 在浓度为40%的酒精中加入4千克水,浓度变为30%,再加入m千克纯酒精,浓度变为50%,则m为多少? A.8 B.12 C.4.6 D.6.4 参考答案: 答案解析:
______ any friends in the city,he felt quite lonely and help ______ any friends in the city,he felt quite lonely and helpless.A.No to have B. 分类:行政能力 题型:单选题 查看答案
-How _________ will you be able to finish the painting?-In a -How _________ will you be able to finish the painting?-In a couple of hours.A.s 分类:行政能力 题型:单选题 查看答案