2. 外语
  3. The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are

The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are

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问题 The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether
   Ａ.  Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
   Ｂ.  Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
   Ｃ.  BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
   Ｄ.  EACH statement ALONE is sufficient.
   Ｅ.  Statements (1) and (2) TOGETHER are NOT sufficient.
Two cyclists are racing up a mountain at different constant rates. Cyclist A is now 50 meters ahead of cyclist B. How many minutes from now will cyclist A be 150 meters ahead of cyclist B?
   (1) 5 minutes ago, cyclist A was 200 meters behind cyclist B.
   (2) Cyclist A is moving 25% faster than cyclist B.
选项
答案A
解析 To answer this question, we need to know how much faster cyclist A is moving than cyclist B. (1) gives us this information, because we know that cyclist A gained 250m on cyclist B in 5 minutes, so he is traveling 50m/minute faster; (1) is sufficient. (2) is insufficient, because their relative rate of motion is useful here only if it can be converted into actual measures of meters over time, which (2) cannot.
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