2014-01-17 09:45:08 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2014年1月16日SAT考试官方每日一题解析,希望对大家备考SAT考试有所帮助。
2014年1月16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.
If
, which of the following could be true?
(A)![]()
(B)![]()
(C)![]()
(D)![]()
(E)![]()
2014年1月16日SAT考试官方每日一题答案:B
解析:
If
and
, then
. Hence if
, it could be true that
.
If
, none of the other four statements could be true:
If
, then
. However, since
, there is no value of
for which![]()
If
, then
.
If
, then
.
If
, then
. However, since
, there is no value of
for which
.
为大家提供与2014年1月16日SAT真题同类题型的一道题目,供各位考生练习:
Cathy likes to wear 2 ribbons, each a different color. If she has 6 ribbons each of a different color, how many combinations of 2 different-colored ribbons can she select to wear?
(A) 3
(B) 6
(C) 12
(D) 15
(E) 36
答案:D解析:It may be helpful to number the ribbons 1, 2, 3, 4, 5, and 6. Ribbon 1 can be worn with ribbons 2, 3, 4, 5, and 6, giving 5 combinations. Ribbon 2 can be worn with ribbons 3, 4, 5, and 6, giving 4 more combinations. (Do not recount ribbon 2 with ribbon 1, since that was counted in the first step.) Similarly, ribbon 3 can be worn with ribbons 4, 5, and 6, ribbon 4 can be worn with ribbons 5 and 6, and ribbon 5 can be worn with ribbon 6. The total number of combinations is 5 + 4 + 3 + 2 + 1 = 15.
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