题目

On hearing her mother was sent to the hospital because of heart attack, Jane dropped the phone and ____ from the office.A.disappeared B.left C.escaped D.fled 答案：【答案】D【解析】考查动词词义辨析。句意：一听到她的妈妈因为心脏病被送往医院，Jane丢下电话，迅速从办公室离开。A. disappeared消失；B. left离开；C. escaped逃跑；D. fled迅速离开。根据句意可知，此处用“迅速离开”表达Jane当时急迫的心情，故选D项。已知点P是不等式组所表示的可行域内的一动点，则点P到抛物线的焦点F的距离的最小值是        ．