(AGI) Moscow, July 17 - The Moscow Stock Exchange openedsharply down on Thursday after the U.S. imposed new sanctionsagainst Russia for its role in the Ukraine crisis. The MICEXindex dropped 2.5 percent. Shares in state oil company Rosneft,which is on the U.S. blacklist, fell 6 percent in the firstminute of trading. There was a 5.5 percent drop in shares inRussia's second biggest gas producer, Novatek. The rouble fell1 percent against the dollar. . .