如图,在平面直角坐标系xOy中,点A的坐标是(1,0),点P是直线l:y=x+3上的一个动点,当PA最短时,P点的坐标是 ( , ) 。 答案:(-1,2)解析:p;【解析】略The old man served in the army in _________, when he was in _________.A.1950’s … his twentiesB.1950’s … twentiesC.the 1950’s … his twentiesD.the 1950’s … the twenties