153.数列 1,1,2,3,5,8,13 的下一个数是( ).
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129.
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88.下列各点中,在直线 x - y -3 = 0 上的点是( ).
A. (2,-1)
B. (-1,2)
C. (-2,1)
D. (1,-2)
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33.
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123.
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18.
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89.若直线ax + 3y +1 = 0 与直线 y = -3x - a 平行,则a =( ).
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91.
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43.
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187.
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