A. that B. when C. where D. why 相关知识点: 试题来源: 解析 B。“when the first humans appeared on Earth”是对“mystery”的解释说明,“谜团是人类第一次出现在地球上是什么时候”,用“when”引导同位语从句,表示时间。反馈 收藏
aWhen when the earliest humans appeared on Earth, dinosaurs have been extinct for tens of thousands of years! People are discovered through fossil dinosaur. 当,当最早期的人在地球上出现,恐龙是绝种成千上万年! 人们通过化石恐龙被发现。[translate]...
aWhen the first humans appeared on earth, dinosaurs have been extinct for several million years! It is through the discovery of fossil dinosaur. 当第一个人在地球上出现,恐龙是绝种几百万年! 它是通过在化石恐龙的发现上。[translate]
Strictly speaking,humans are the smartest animals on Earth—at least according to human standards. ... Measuring the intelligence of animals can be difficult because there are so many indicators, including the ability to learn new things, the ability to solve puzzles, the use of tools, and sel...
Ever since humans lived on the earth,they have made use of various forms of communication.Generally,this expression of thoughts and feelings has been in the form of oral speech.When it is difficult to express withlanguage,communication is accomplished (完成) through sign language in which body ...
His story ended happily when he returned to Earth39 very good health.Scientists wanted to know the answer to the important question: could 40 animal like Ham do the samethings in space as he could do on Earth? The answer came when Ham was sent into space in 1961. Yes, he didevery...
When did humans first go into space? The story began not so very long ago, 31 the first astronauts were not people-- they were animals. Scientists wanted to make travelling to space as 32 as possible for humans.So they decided to experi-ment with animals and test 33 in spaceflights. ln...
wonderinghowIcametolooksolikemymotherwithoutnoticing.I?vealsorealizedthatmywaist nolongerfitsintobabyfatbutamiddle-agedspread. IalsofearthatIdon?tknowwhatmiddleagelookslikeformygeneration.Didmymotherstill feel24wheninrealityshewas15yearsolder? AndwhydoInotfeellikeI?mwhereIshouldbeas Iapproach40?Idefinitely...
Ever since humans lived on the earth, they have madev【小题1】forms of communication. In general, the major form of expressing thoughts and feelings has been s_【小题2】__ language. But when there is a language barrier(障碍), that is, people m【小题3】each other , communi...
求翻译:When the earliest humans appeared on Earth, dinosaurs have been extinct for tens of thousands of years! People are discovered through fossil dinosaur.是什么意思?待解决 悬赏分:1 - 离问题结束还有 When the earliest humans appeared on Earth, dinosaurs have been extinct for tens of thousands...