一元二次方程x2﹣2x+m=0总有实数根,则m应满足的条件是____
The boy is to his teacher.
—When did he finish the book?
一Last week.
2HCl+NaClO=NaCl+Cl2↑+H2O 产生的氯气有剧毒。
程序框图如图所示,其输出的结果是()