若n（n≠0）是关于x的方程x²+mx+2n=0的根，则m+n的值为（　　）

清朝实行的“重农抑商”和“海禁”政策产生的相同影响是(　　)
①阻碍了资本主义萌芽的发展
②强化了自给自足的自然经济
③造成了中国的日益落后
④加速了小农经济的解体

    Mary works in a bank. She is ____ busy every day that she____ no time to make dinner. There is a(n)____near Mary's house. After Mary comes back home from work, she likes to go to the restaurant____dinner.

    One day,____ Mary was in the restaurant, she saw____old man next to her looking for (寻找)something on the floor(地板).Mary felt surprised. So she____the old man.

    "____are you looking for?"

    "Oh, a piece(块)of bread," the man answered.

    "A piece of bread? Oh, the floor is so____.Please take this piece." Mary gave(给)a big piece of bread to the old man.

    "But my teeth____in that piece of bread."

将点A（﹣3，﹣2）向左平移5个单位，再向下平移4个单位得到点B，则点B的坐标为（　　）