下面是2014年1月28日的SAT官方每日一题的内容，是关于数学方面的，题型是选择。SAT官方每日一题是collegeboard每天都会发布的题目，关于SAT考试的三个部分的各个题型。大家和无忧小编一起来看一下这个SAT官方每日一题吧。

　　SAT官方每日一题之数学---选择：

　　Mathematics > Standard Multiple Choice

　　Read the following SAT test question and then click on a button to select your answer.

　　Machine, working at a constant rate, can producebolts per hour. Machine, working at a constant rate, can producebolts per hour. In terms of, how many bolts can both machines working together at their respective rates produce inhours?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　The correct answer is D

　　Explanation

　　Machine, working at a constant rate, can producebolts per hour, and machine, working at a constant rate, can producebolts per hour. Therefore, in one hour, both machines working together at their respective rates can producebolts. It follows that inhours, both machines working together at their respective rates can producebolts.

　　下面为大家提供一些和这些SAT官方每日一题相似的题目，供大家练习：

　　If the functionis defined by, where, for which of the following values ofisundefined?

　　(A) None

　　(B)only

　　(C)only

　　(D)andonly

　　(E),, and

　　The correct answer is C

　　Explanation

　　If, then. If, then. If, then, which is not defined because division byis undefined. Therefore, of the three values,,, and, the only one for whichis undefined is. Thus the correct response isonly.

　　以上就是关于2014年1月28日SAT官方每日一题中数学部分的详细内容，包括了题目和选项以及答案，后面附有一道相关的练习题。大家可以在备考SAT的过程中关注SAT每日一题的内容，这样就可以更好有不间断的练习，也就能在日积月累的过程中得到提高。