分解因式：x2+2x-3=______．
x2+2x-3=（x+3）（x-1）．
故答案为：（x+3）（x-1）．
I’ve never seen ___ you.
A．a such man like
B．a such man as
C．such a man as
D．such a man like
水泥粉煤灰碎石桩施工前要进行工艺性试验，施工后要做（）试验
A、低应变、平板荷载
B、抽芯
C、平板荷载
D、原材料抽检
