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发布时间：2006-06-23 11:59     点击：

Jack is on the same team as Karen　　

Karen is not on the same team as Nick　

Ruth runs an earlier leg of the race than Peggy runs 　　

Whether or not they on the same team as each other　　

Mark and Nick are both on team Y　　

Neither Jack nor Mark runs third　　

Karen and Laura both run second　　

Owen runs fourth

18. Which one of the following must be true?

(A) If Jack and Owen are assigned to the same team as each other Jack runs  first

(B) If Jack and Peggy are assigned to the same team as each other Jack runs 　　fourth

(C) If Jack and Ruth are assigned to the same team as each other Ruth runs 　　third

(D) If Mark and Owen are assigned to the same team as each other Mark runs 　　fourth

(E) If Mark and Ruth are assigned to the same team as each other. Ruth runs 　　third

19. If Ruth is assigned to team X which one of the following is a complete and accurate list of the legs that she could run?

(A) first (B) second (C) first, second (D) first, third (E) second, third

20. If Owen and Ruth are assigned to the same team as each other which one of the following must be true?

(A) Mark runs fourth

(B) Nick runs first

(C) Nick runs fourth

(D) Peggy runs first

(E) Peggy runs fourth

21. Any of the following can be true EXCEPT

(A) Jack runs first

(B) Mark runs fourth

(B) Nick runs first

(C) Nick and Peggy both run third

(D) Owen and Peggy both run fourth

22. If Ruth and Peggy are assigned to the same team as each other which one of the following must be true?

(A) Jack runs first

(B) Mark runs fourth

(C) Nick runs third

(D) Peggy runs third

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