（请用小学三年级的数学知识解答）---**Extraction Content:** **(1) 同学们如下图所示手拉手站成一排，需要几个人才能站成大约 10 米长?** **(2) 多少名同学手拉手站成一排，大约够 1000 米长?** **Chart/Diagram Description:** * **Type:** Photograph illustrating a line of people holding hands. * **Main Elements:** * **People:** There are 10 people (likely students based on the question) standing in a line. * **Formation:** They are standing side by side, holding hands with the adjacent person. They are facing away from the viewer, showing their backs. * **Relative Position:** The people are arranged in a horizontal line across the image. * **Background:** The background is a light color, possibly a wall or plain backdrop. There are some faint, blurry shapes in the upper background, possibly writing or marks.