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  • 1. 如下表所示,小聪家在A点,用(3,1)表示,小明家在B点,用(8,5)表示.若用(3,1)—(4,1)—(5,1)—(5,2)—(5,3)—(5,4)—(6,4)—(7,4)表示由A到B的一种走法,并规定从A到B只能向下或向右走.那么下面走法符合题意的有(    )

    (1,1)

    (2,1)

    A(3,1)

    (4,1)

    (5,1)

    (6,1)

    (7,1)

    (8,1)

    (1,2)

    (2,2)

    (3,2)

    (4,2)

    (5,2)

    (6,2)

    (7,2)

    (8,2)

    (1,3)

    (2,3)

    (3,3)

    (4,3)

    (5,3)

    (6,3)

    (7,3)

    (8,3)

    (1,4)

    (2,4)

    (3,4)

    (4, 4)

    (5,4)

    (6,4)

    B(7,4)

    (8,4)

    (1,5)

    (2,5)

    (3,5)

    (4,5)

    (5,5)

    (6,5)

    (7,5)

    (8,5)

    (1,6)

    (2,6)

    (3,6)

    (4,6)

    (5,6)

    (6,6)

    (7,6)

    (8,6)

    A . (3,1)—(4,1)—(4,2)—(5,2)—(6,2)—(7,2)—(7,3)—(8,3) B . (3,1)—(4,1)—(5,1)—(6,1)—(7,1)—(7,2)—(7,3)—(7,4) C . (3,1)—(4,1)—(5,1)—(6,1)—(7,1)—(8,1)—(8,2)—(8,3)—(8,4)—(7,4) D . (3,1)—(4,1)—(5,1)—(6,1)—(6,2)—(6,3)—(6,4)—(6,5)—(7,5)—(7,4)

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