题目

设函数 ． ①若 ，则 ； ②若 ，则 取值范围是． 答案：【1】1【2】(12 ， +∞). One of the skaters talented enough to stop her is Asada, who _____ against her since they were junior skaters. A．would compete B．is competing C．has been competing D．is being competed