Australia shares seen sharply weaker, NZ stocks skid
SYDNEY, Jan 18 (Reuters) - Australian stocks are set for a slippery start on Monday, tracking Wall Street's sharp fall on Friday on sliding oil prices and worries about global growth. Stock index futures dropped 1.8 percent to 4,745.0, a 147.8-point discount to the close of the underlying S&P/ASX 200 index on Friday. Global miner BHP Billiton is expected to open sharply lower after its U.S. ADRs tumbled 2 percent on Friday. The benchmark index has dropped 7.6 percent this year and t