TORONTO, April 10 (Reuters) - Canada's main stock index closed lower on Thursday as a selloff in U.S. technology and biotechnology stocks hit investor sentiment and fueled declines in every major sector. The Toronto Stock Exchange's S&P/TSX composite index unofficially ended down 127.58 points, or 0.88 percent, at 14,308. All of the 10 main sectors on the index were in the red. (Reporting by John Tilak; Editing by James Dalgleish)
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