下面是2014年2月21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。大家和澳际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.

　　Which of the following statements must be true of the lengths of the segments on lineabove?

　　.

　　.

　　.

　　(A)only

　　(B)only

　　(C)only

　　(D)andonly

　　(E),, and

　　The correct answer is B

　　Explanation

　　Consider each statement separately. For example, consider statement,. From the figure, you can see that segmentis made up of the segments,, and. This tells you thatcannot equal, sincecannot equal zero. Statementis not true.

　　Consider statement,. Sinceis betweenand, it follows that. Sinceis betweenand, it follows that. Therore,. Since bothandequal, they are equal to each other. Statementis true.

　　Consider statement,. The lt side of the equation,, is equivalent to. The right side of the equation,, is equivalent to. Sincecannot equal zero,is not equal to. Statementis not true.

　　Statementis the only one that is true.

　　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：

　　A florist buys roses ata piece and sells them fora piece. If there are no other expenses, how many roses must be sold in order to make a profit of?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　The correct answer is E

　　以上就是关于2014年2月21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。

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