The problem of adaptive disturbance attenuation for a class of uncertain nonlinear systems is studied. Based on the adaptive technique and continuous domination method, the proposed control strategy can deal with serious coexistence of various uncertainties which include unknown nonlinear parameters, external disturbances and time-varying control coefficients with unknown lower bound. The adaptive state-feedback controller is one-dimensional, and its performance is evaluated in terms of $L_2-L_{2p