题目

任务型阅读Jambo's StoryIn 1986, a video of a frightening event involving a gorilla (大猩猩) and a boy was watched by millions of people around the world. The video is still popular on the Internet today, changed people's opinions of gorillas forever.On 31 August, 1986 a couple took their two young sons to Jersey Zoo. When the family arrived, they went to see the gorillas straight away. The father noticed that the children were too small to see the animals, so he picked up his five-year-old son, Levan, and put him on the top of the wall. Then he turned round to pick up his other son.Whe如图乙，质量为2kg的小球悬挂在细绳下来回摆动，请用力的示意图表示小球所受到的重力。