Things that people find in nature and use are called, natural resource, man-made thing, Do people use things they find in nature?, Yes, No, Question: Natural resources are things that people make by themselves., A: False, B: True, Question: Where do natural resources come from?, From nature, From factories

视觉风格

显示所有

活动设置

排行榜

切换模板

恢复自动保存:?