单词拼写 Thus humans who lived a million years ago, despite their big brains and s(锋利的) stone tools, lived in constant fear of meat-eating animals. 相关知识点: 试题来源: 解析 sharp意:,在100万年前生活的人类,尽管他们有发达 的大脑和锋利的石器,却一直生活在对肉食动物的恐惧中。sharp 意为...
over (two million) years ago, there were no humans here. 因为前面用了over,后面就一定用具体的数字 如果没有over,就要说millions of years ago 第5题的正确答案是C。购物前通常需要列出购物清单,以确保不会遗漏任何物品。 第6题的正确答案是B。生日通常用介词“in”表示,例如“My birthday is in June”...
Generally, it is believed that hominids first evolved in Africa and then migrated to other areas. There were four main stages of human evolution. The first, between four and seven million years ago, consisted of the proto homininsSahelanthropus,OrrorinandArdipithecus.These humans may have been b...
Around 200 million years ago, the earth was 18 degrees warmer than it is now. That might be a bit hot for humans, but it was just right for the giant dinosaurs that wandered about the earth during the Mesozoic (中生代的) era. A new study found that planteating dinosaurs may have contr...
Humans faced a 'close call with extinction' nearly a million years agoNews By Charles Q. Choi published September 1, 2023 The human population may have lingered at about 1,300 for more than 100,000 years, and that population bottleneck could have fueled the divergence between modern...
百度试题 结果1 题目 Thus humans who lived a million years ago, despite their big brains and s___stone tools, lived in constant fear of meat-eating animals. 相关知识点: 试题来源: 解析 harp 反馈 收藏
百度试题 结果1 题目 单词拼写Thus humans who lived a million years ago, despite their big brains and(锋利的)stone tools, lived in constant fear of meat-eating animals. 相关知识点: 试题来源: 解析 sharp 反馈 收藏
Rise of Humans 2 Million Years Ago Doomed Large CarnivoresKate Wong
Around 200 million years ago the earth was 18 degrees warmer than it is now. That might be a bit hot for humans but it was just right for the giant dinosaurs that wandered about the earth during the Mesozoic (中生代的) era. A new study found that planteating dinosaurs may have contribut...
"People were here breaking up the limb bones of this mastodon ... probably to make tools out of, and they may also have been extracting the marrow for food," Holen said. He noted that human ancestors in Africa used this same approach on elephant limb bones some 1.5 million years ago. ...