Some opioid antagonists are not pure antagonists but in fact do produce some weak opioid partial agonist effects, and can produce analgesic effects when administered in high doses to opioid-naive individuals.
Does the US Navy have 10 or 19 Aircraft Carriers? The U.S. Navy operates 19 ships that could be called aircraft carriers, but only considers 10 to be actual carriers. Last week the U.S. Navy accepted USS America, first of the America-class amphibious assault ships, into service.
China currently has no aircraft carriers in its naval fleet but is slated to build and induct an aircraft carrier by 2010. In strategic nuclear defence and delivery systems, China's army is miles ahead of India's nuclear forces with 200-400 active nuclear warheads.