对任意实数x,y，定义运算$x*y=ax+by+cxy$，其中a,b,c是常数，等式右边的运算是通常的加法和乘法运算。已知$1*2=3,2*3=4$，并且有一个非零常数m，使得对任意实数x， 都有$x*m=x$，则m的值是（    ）

希望小学三年级共有880人，平均分成8组，每组____人。

增加：在缺词处加一个漏字符号（∧），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：在错的词下划一横线，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。

    I was sitting at my favorite table in a restaurant on last Sunday waiting for the food I had ordered to arrive. I suddenly found that Lin Ling, one of my classmate, worked as a waitress there. Honest speaking, it was great surprise for me to find her working there. As far as I know, she's from a richer family. What made her work there? I walked up to her but asked her the reason. When asking, she said, “I just want to earn some pocket money so that we can help some children in poor areas go back to school.” How a good girl! I should learn from her.

①文化传播的手段具有多样性和相对稳定性       
②文化既是民族的又是世界的

③对待传统文化应该坚持批判继承古为今用  
④借鉴外来文化必须以我为主