GRE數(shù)學(xué)：網(wǎng)絡(luò)課堂邏輯筆記（5）.

　　Passage 5

　　Eight adjacent offices completely enclose a circular central courtyard. The offices are numbered consecutively, beginning at one of the offices with 1 and proceeding clockwise to 8. Eight junior executives-J, K, L, M, N, O, P, and R-are to occupy the offices, one to an office. The assignment of offices is subject to the following restrictions:

　　J is allowed first choice of any of the offices.

　　K and P must be assigned to adjacent offices.

　　L and P must be assigned to adjacent offices.

　　M and O must be assigned to adjacent offices.

　　M and N cannot be assigned to adjacent offices.

　　O is assigned to office 2 unless J chooses it; in that case, O will be assigned to office 3.

　　K is assigned to office 7 unless J chooses it; in that case, K will be assigned to office 5.

　　1. Which of the following is an assignment of executives to offices, beginning with office 1 and proceeding consecutively to office 8, that conforms to the restrictions above?

　　(A) J, O, M, R, L, P, K, N

　　(B) J, R, O, M, L, P, K, N

　　(C) M, O, N, K, P, L, R, J

　　(D) M, O, R, J, L, K, P, N

　　(E) N, J, O, M, K, P, L, R

　　2. If J chooses office 8, which of the following must be true?

　　(A) L is assigned to office 5.

　　(B) M is assigned to office 1.

　　(C) M is assigned to office 3.

　　(D) N is assigned to office 1.

　　(E) R is assigned to office 1.

　　3. P could be assigned to which of the following offices?

　　(A) 1 (B) 2 (C) 3 (D) 4 (E) 5

　　22. If N is assigned to office 5, which of the following can be true?

　　(A) L is assigned to office 3.

　　(B) M is assigned to office 4.

　　(C) O is assigned to office 3.

　　(D) P is assigned to office 1.

　　(E) R is assigned to office 6.