A. About 2 million. B. About 10 million. C. About 100 million. D. About 1.75 million. 相关知识点: 试题来源: 解析 B 正确答案:B 解析:细节题。根据第一段Most people agree on an estimate of somewhere near 10 million…可知,大部分科学家认为地球上有大约一千万种物种,故选B。反馈 收藏 ...
species richness'How many species are there' is a question receiving more attention from biologists and reasons for this are suggested. Different methods of answering this question are examined and include: counting all species; extrapolations from known faunas and regions; extrapolations from samples...
1【题目】Read again and answer.1 How many endangered species are there?2 Which animal has red, orange or yellow stripes?3 Which animal has a spotted tail?4 Where does the Lehmann's poison frog live?5 Which animal has got spots on its wings?6 What did they do to protect butterflies in...
How many species are there that haven’t been cataloged? The estimates for the total number of species range widely from 7 to 30 million species. The most conservative of these estimates is 10 to 12 million. Using 10 million species, it will take scientists, at their current rate, until ...
'How many species are there' is a question receiving more attention from biologists and reasons for this are suggested. Different methods of answering this question are examined and include: counting all species; extrapolations from known faunas and regions; extrapolations from samples; methods using...
句中的it为形式主语,that引导主语从句,由“we still do not know how many species there are in the world today(我们仍然不知道今天世界上有多少种物种)”可知C选项符合语境。句意:我们现在还不知道世界上有多少物种,这是相当令人尴尬的。 反馈 收藏 ...
3Itisrather___thatwestilldonotknowhowmanyspeciesthereareintheworldtoday.[ ] A. misleading B. embarrassing C. boring D. demanding 4 It is rather ___ that we still do not know how many species there are in the world today. misleadingembarrassingboringdemanding 反馈 收藏 ...
1It is rather ___ that we still do not know how many species there are in the world today. A. misleading B. embarrassing C. boring D. demanding 2It is rather ___ that we still do not know how many species there are in the world today. A. misleading B. embarrassing C....
How many species are there on Earth according to most scientists A、About 2 million. B、About 10 million. C、About 100 million. D、About 1.75 million. 免费查看参考答案及解析 12345下一页 共1000条数据 亲,您把题目复制到这里 搜一搜,就有答案。免费的哦...
(1997) ask: 'How many valid species of Acipenser should we recognize?' Although a partial answer to this questio... VJ Birstein,WE Bemis - 《Environmental Biology of Fishes》 被引量: 439发表: 1997年 How many species are there? Summary This chapter assesses estimates of the total number ...