题目

增加：在缺词处加一个漏词符号（^），并在其下面写出该加的词。删除：把多余的词用斜线（\）划掉。修改：在错的词下画一横线，并在该词下面写出修改后的词。注意：1、每处错误及其修改均仅限一词；2、只允许修改10处，多者（从第11处起）不计分。Apologizing can be harder than realizing you’ve acted poor. To truly apologize to a friend, you had to be sincere and let your friend to know how much he means to you. It’s easy said than done. But if you swallow your pride and show some sincere regret, they已知x1和x2分别为方程x2+x﹣2=0的两个实数根，那么x1+x2=_______；x1•x2=_______． -1， -2 【解析】∵方程x²+x?2=0中a=1，b=1，c=?2， ∴+==?=?1, == =?2， 故答案为：?1；?2.