2014-07-18 14:57:53 来源: Collegeboard 责编:楷维留学指南
Question of the Day. Can you answer today's question? 这就是SAT考试官网collegeboard的每日一题的训练。SAT考试不像托福、雅思或者GRE、GMAT考试,会有回忆机经,因此官网上的SAT真题就显得尤为重要。SAT考试官方每日一题可以让你熟悉SAT考试的出题方向及出题规律,有很大的参考价值,是每一位SAT考生都需要的备考资料。
楷维留学小编为大家整理SAT考试官方真题每日一题解析,此次整理2014年7月18日SAT官网每日一题:SAT数学真题。希望对大家备考SAT考试有所帮助。
2014年7月18日SAT真题
Mathematics > Standard Multiple Choice 数学选择
Read the following SAT test question and then click on a button to select your answer.
In an
solution of water and alcohol, the ratio by mass of water to alcohol is
to
. If
grams of a solution consisting of
grams water for each gram of alcohol is added to the
solution, what fraction by mass of the new solution is alcohol?
(A)![]()
(B)![]()
(C)![]()
(D)![]()
(E)![]()
2014年7月18日SAT考试官方每日一题答案:B
解析:To find what fraction by mass of the new solution is alcohol, you can find how many grams of alcohol are in the final solution of
grams. Since the
solution is
part alcohol to
parts water, it is
alcohol. So it contains
grams of alcohol. Similarly, the
solution is
alcohol by mass, so it contains
grams of alcohol. Thus, the final
solution contains
grams of alcohol, so
, or
, of it is alcohol.
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