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 counter- clockwise), 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.
What is the value of 12/5p?
   (1) p＜0
   (2) p2-9=0
选项
答案C
解析 Because statement (1) just tells us that p could be any negative number, it is not sufficient to answer the question. A and D can be eliminated.
   Statement (2) alone tells us that p could be either 3 or -3, which would give different values for 12/5p so it is also not sufficient and we can eliminate B.
   The statements together tell us that p must be -3, so we can solve for 12/5p and C is the correct answer.
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