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发布时间：2006-06-23 11:59     点击：

In an even-position round, teams in position 2 and 4 play against teams positioned immediately above them.　　

When a lower-positioned team defeats a higher-positioned team, the two teams switch positions after the round is completed.

19. Which one of the of following could be the order of teams, from position 1 through position 5 respectively, after exactly one round of even-position matches if no odd-position round has yet been played?　　

(A) J , R, M, L, S　　

(B) J, R, S, L, M　　

(C) R, J, M, L, S　　

(D) R, J, M, S, L 　

(E) R, S, J, L, M

20. If exactly two rounds of matches have been played, beginning with an odd-position round, and if the lower-positioned teams have won every match in those two rounds, then each of the following must be true EXCEPT:　　

(A) L is one position higher than J.　　

(B) R is one position higher than L.　　

(C) S is one position higher than R.　　

(D) J is in position 4.　　

(E) M is in position 3.

21. Which one of the following could be true after exactly two rounds of matches have been played?　　

(A) J has won two matches.　

(B)L has lost two matches.　　

(C) R has won two matches.　

(D) L\'s only match was played against J.　　

(E) M played against S in two matches.

22. If after exactly three rounds of matches M is in position 4, and J and L have won all of their matches, then which one of the following can be true?　　

(A) J is in position 2.

(B) J is in position 3.　　

(C) L is in position 2.　　

(D) R is in position 1.

(D) S is in position 3.

23. If after exactly three rounds M has won three matches and the rankings of the other four teams relative to each other remain the same, then which one of the following must be in position 3?　　　

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