已知关于x的一元二次方程（a﹣1）x2﹣2x+1=0有两个不相等的实数根，则a的取值范围是____．
下列关于细胞癌变的叙述，错误的是（ ）
We arrived at the station too early and had ___________ to go, so we sat there and chatted with each other.
