用英语写出下列电话号码 (1) 110 (2) 95598 (3) 119 (4) 120 (5) 10086 (6) 12315 答案:【1】one one zero
【1】nine five five nine eight
【1】one one nine
【1】one two zero
【1】one zero zero eight six
【1】one two three one five曲线C的参数方程为x=2cosαy=1+cos2α(α为参数),将其化为普通方程结果为y=12x2(x∈[-2,2])y=12x2(x∈[-2,2]).