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.
Is y between 1 and 2, exclusive?
   (1) y2 is less than y
   (2) y2+y is between 1 and 2, exclusive
选项
答案D
解析 alone is sufficient because the only values for y in which y2 is less than y are if y values between 0 and 1, so the answer is "no." (2) alone is sufficient because there is no value of y between 1 and 2, exclusive, for which this statement is true [the value 1, which is excluded in the question, gives the result 2, which is excluded in statement (2)], so the answer is "no."
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