lemonduck 发表于 2006-10-20 19:29:43

求助GMATprep的一道数学题

The rate of a certain chemical reaction is directly proportional to the concentration of chemical A present and inversely proportional to the concentration of chemical B present. If the concentration of chemical B is increased by 100 persent, which of the following is closest to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?

a 100% decrease   b 50% decrease  c 40% decrease   d 40% increase  e 50% increase  

就没看懂题目是什么意思@@

答案是d

wanghui_cohouse 发表于 2006-10-23 23:22:53

回去检查你的题目，别告诉我们你没有抄错！

第三行第四个persent是什么东东。当然问题应该不是这个单词错误，这是能说明你的题目有可能抄错了。

Daj 发表于 2006-10-24 03:28:29

maybe 题目有错
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