【问题】一只蜗牛从某一点出发,在一条直线上来回爬行。假定向右爬行的路程记为正数,向左爬行的路程记为负数,那么蜗牛在一段时间内爬过的路程依次记为:+4,-2,+9,-7,-6,+11,-10(单位:cm)。请你想一想:蜗牛最后是否回到了出发点?【思路点睛】我们可以根据题中的叙述,画出一条线,模仿蜗牛的爬行来回试一试,看看最后蜗牛在什么地方。除了这样做,我们还可以 [Question] A snail from a certain point, crawling back and forth in a straight line. Assuming the journey to the right is recorded as a positive number and the journey to the left is recorded as a negative number, the snail crawls over a period of time in turn is recorded as: +4, -2, +9, -7, -6, + 11, -10 (unit: cm). Please think about it: The snail finally returned to the starting point? [Ideas dotting] We can draw a line according to the title of the article, imitate snail crawling back and forth to try to see where the last snail. In addition to doing this, we can