清朝嘉庆皇帝曾谕告军机大臣等：“浙江各府属山势深峻处所，多有外来游民……翻掘根株，种植苞芦，以致山石松浮，一遇山水陡发……大为农人之害。其游民……成群结伴，散出各山……往来无定，难保日久不滋生事端。”对此理解不准确的是（   ）

组合图形的面积是____平方厘米

    My name is Lucy and this is my grandfather．His name is Tim and he is my  best friend．My grandfather is 64 years old and he is retired now,so he has much time to be and play with me．I love him very much and I know he loves me too．

    He lives with me．my father,my mother and my brother Kevin．We live in a big house．My grandfather is a very tall and strong man!Can you see me on his shoulders (肩膀)in this picture?He is really strong!My grandfather always knows what l want to do or to eat or what I feel inside!When I am sad，he makes me laugh with his funny faces．Every night before I go to bed，my grandfather tells me stories，and he even sings for me!

根据材料内容选择最佳答案。

一位母亲生了一儿一女双胞胎，这两个小孩最有可能来自于（　　）