题目

若动圆的圆心在抛物线x2=12y上,且与直线y+3=0相切,则此动圆恒过定点A.(0,2)                   B.(0,-3)                  C.(0,3)                 D.(0,6) 答案：C解:由抛物线定义知动圆恒过焦点F(0,3),选C.–Could I ______ some money from you?--Sorry, I______it to my friend just now.A. borrow, lentB. borrow, lendC. lend, borrowedD. lent, borrow