解析 A。解析:这句话的意思是“地球上的生命是如何开始的仍然是一个谜”。“life began on earth”不缺主语、宾语等成分,表达的是方式的疑问,所以用 how 引导主语从句。B 选项 what 在名词性从句中需充当成分;C 选项 that 在主语从句中无实际意义,但不符合语境;D 选项 when 表示时间,不符合语境。
A. How B. What C. Where D. That 2___life began on the earth is one of the biggest puzzles to scientists. A. How B. What C. Where D. That 3___ life began on the earth is one of the biggest puzzles to scientists. A. How B. What C. Where D. That 反馈 收藏 ...
这里描述的是火星上的生活可能是什么样子。 5.___ life on the Earth, life on Mars would be better in someways.与地球上的生活相比,火星上的生活在某些方面要好些。 答案 【话题识记·核心句式】 1.Itseemed that 2.Howlong 3.Itis hoped that 4.Hereis 5.Comparedwith...
It was this mind-blowing series of improbable events that made Earth the possibly unique life-bearing planet it now is. The idea that Earth may indeed be unique could have been spawned by this famous photo taken on the Apollo 8 mission in 1968.正是这一系列令人兴奋的不可能的事件，使地球成...
The earliest evidence for life on Earth arises among the oldest rocks still preserved on the planet. Earth is about 4.5 billion years old, but the oldest rocks still in existence date back to just 4 billion years ago. Not long after that rock record begins, tantalizing evidence of life emer...
A. Life on Earth began in the desert. B. Life on Earth began in the mountains. C. Life on Earth began in the ocean. D. Life on E. arth began in outer space. 相关知识点: 试题来源: 解析 C。解析:这句话明确指出科学家认为地球上的生命始于海洋,所以主要意思是地球上的生命始于海洋。反...
What we know of life on earth suggests that life ___ wherever the proper conditions exist. A. arise B. could arise C. would arise D. will arise正确答案是D.我一开始选的是C 其实我觉得B.C.D好像都行 求大神指教! 相关知识点: 试题来源...
D.Theauthorurgesimmediateactiononclimatechange. B 语篇类型:说明文 主题语境:人与自然 词数:357 难度:★★★ Naturaldisastersrequirespecialbuildingdesign (2022·湖南省湖南师大附中高二阶段练习)Naturaldisastershappeneverywhereinthe world.Manycausepropertydamageandlossoflife.Butresearcherssaytheseverity(严重性)of t...
"No matter how you choose in life, there will always be regrets, but people always believe that the road they haven't taken is full of flowers." What we need to do is not to regret our choices at that time, but to...
26. life began on the earth is one of the biggest puzzles to scientists.A.HowB.WhatC.WhereD.That