已知圆x2+y2 +4x-8y+11=0,经过点P (1,0)作该圆的切线，切点为Q，则线段PQ的长为
A、4A
暂无解析
名词解释：privateinternationallaw
Thisofferisfirm,subjecttoyourimmediatereply____shouldreachusnotlaterthantheendofthismonth.()
Hedeclined_______moreaboutit.
TheNetherlandsistheonlycountryinEuropewhichpermitseuthanasia,________itisnottechnicallylegalthere.
Pleaseseetoitthatthegoodsweorderedareshippedassoonasthecoveringletterofcredit____you.()
