Dec 1 (Reuters) - Australian shares snapped a three-day winning streak to drop on Friday, pulled down by financials and technology stocks, as traders gauged uncertainty over future interest rate cuts by the U.S. Federal Reserve. Separately, Coles Group COL.AX fell nearly 1% even as Australia's competition regulator gave consent to the retailer's proposed acquisition of two milk processing plants from dairy processor Saputo. Central bank deputy governor on Friday warned that persistently high core inflation "left little room for error" around monetary policy.