挑战习题
1/5单选题
难度:

1.

2009年2月20日江苏盐城市有二十余万市民饮用水出现了问题,原因是水源地里一家化工企业公然偷排30吨工业废水所造成的. 为了饮水安全,李明家和陈 刚家都从甲、乙两供水点购买同样的一种桶装矿泉水,李明家从甲、乙两个供水点分别购买了10桶和6桶,共花费51元;陈刚家从甲、乙两个供水点分别购买了 8桶和12桶,共花费66元. 若只考虑价格因素,通过计算说明到(  )家供水点购买这种桶装的矿泉水更便宜一些。

 


A

甲供水点

B

乙供水点

C

甲乙一样

D

不能确定

提示1:
PHA+6aaW5YWI6K6+6L+Z56eN55+/5rOJ5rC05Zyo55Sy44CB5LmZ5Lik5aSE5q+P5qG255qE5Lu35qC85YiG5Yir5Li6eOOAgXnlhYPvvIw8L3A+
提示2:
PHA+5qC55o2u5YWz6ZSu6K+t5Y+l4oCc5LuO55Sy44CB5LmZ5Lik5Liq5L6b5rC054K55YiG5Yir6LSt5Lmw5LqGMTDmobblkow25qG277yM5YWx6Iqx6LS5NTHlhYPigJ3lj6/lvpfmlrnnqIvvvJoxMHgrNnk9NTHvvJs8L3A+
提示3:
PHA+4oCc6ZmI5Yia5a625LuO55Sy44CB5LmZ5Lik5Liq5L6b5rC054K55YiG5Yir6LSt5Lmw5LqGOOahtuWSjDEy5qG277yM5YWx6Iqx6LS5NjblhYPigJ3lj6/lvpfmlrnnqIs4eCsxMnk9NjbvvIzogZTnq4vkuKTkuKrmlrnnqIs8L3A+
正确答案:QQ==
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