1 急 

1.B    ①+②得4x﹦4k
              ∴x=k
               ①‐②得y﹦2k+1
             ∵x+y≥7
             ∴k+2k+1≥7
             ∴k≥2
2.33    设这个数为x,则有
            2x－1＞65,解得
                   x＞33
              ∴最小整数34