美洲狮是群居动物吗?

①．取食 ②．攻击 ③．防御 ④．繁殖 ⑤．观察

S=3.14*8*8=200.96KM2
约2万公顷

解题思路：为了弄清生物之间的亲缘关系，我们把生物分成不同的等级，生物的分类单位从大到小依次以界、门、纲、目、科、属、种，据此答题．

生物学家根据生物之间的相似程度，把它们分成不同的等级，生物的分类单位从大到小依次以界、门、纲、目、科、属、种，分类单位越大，生物的相似程度越少，共同特征就越少，包含的生物种类就越多，生物的亲缘关系就越远；分类单位越小，生物的相似程度越多，共同特征就越多，包含的生物种类就越少，生物的亲缘关系就越近．
界是最大的单位，同界的生物亲缘关系最远，种是最基本的分类单位．
据表可知：题干中的山猫、美洲野猫、美洲狮同科，山猫、美洲野猫、大熊猫、美洲狮同目，所以与其他3种动物的亲缘关系最远的是大熊猫．
故选：C

点评：
本题考点： 动物的分类．

考点点评： 掌握生物的分类的知识是解题的关键．

是新概念第三册LESSON 1:A PUMA AT LARGE么?
D A C C D B D D C B B A

1.你说的这些都是猫科动物,虎:体型大,体长超过1.5米体黄色具黑色条纹,头圆大.我国有5个亚种:1 孟加拉虎,分布于西藏、云南;2 东北虎:东北、内蒙;3 华北虎:河北、河南、山西、新疆;4 华南虎:福建、江西、广东;5 印支虎:云南、广西. 国外尚有苏门达腊虎、爪哇虎和巴里虎,后两个亚种已灭绝. 华南虎为我国特产,现已处于极危境地,所有虎为我国1级保护动物狮:大型,头短而圆,面宽,耳圆,尾的...

原文题目是A Puma At Large
Puma即美洲狮,at large有在逃的意思.

Describe the occasion when the woman picking blacking saw the puma .Expand the following into a paragraph of aboyt 150 words.
Mrs.stone had spent the whole morning...It was nearly lunch time,so she decided...She was just...When she heard a noise in...
Then she saw an animal which.She knew it was not a cat because...The animal suddenly...and she thought it was going to...She dropped her basket and...Hearing the sound,the animal...after which,Mrs Stone...and ran all the way home.She told her neighbours that...but they didi not believe her.She also telephoned the police but they...
Key to Composition
Mrs.Stone had spent the whole morning picking blackberries in the countryside near her home.It was nearly lunch time,so she decided to return for lunch.She was just picking up her basket when she heard a noise in the bushes.Then she saw an animal which looked like a cat.She knew it was not a cat because it was so large.The animal suddenly turned round to look at her and she thought it was going to come towards her and perhaps attack her.She dropped her basket and screamed loudly.Hearing the sound,the animal disappeared into the bushes,after which Mrs.Stone picked up her basket and ran all the way home.She told her neighbours that she had seen a puma in the countryside,but they did not believe her.She also telephoned the police but they didn't believe her either.(148 words)

我只讲各自最明显的一个特征：
美洲狮嘴边有黑纹,其它相似动物都没有；
山猫是指狞猫吗?它的耳尖有簇毛；
母狮子尾尖有丛毛球；
美洲虎斑纹成圈,里面还有黑斑；
豹子斑纹一般不成圈,即使成圈也是空心无斑的!

D
做题之前先要分析一下选项之间的不同；A是不定时的完成时,B是不定式；C是一般过去时,D是过去完成时.接着看主干部分,said是一般过去时,那么表示过去的过去,所以应该用过去完成时,也就是D选项
C
just the same意思是依然,有still 的含义,
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消费者

武汉百思特《新概念英语》培训部：这句话的意思是美洲狮以小动物为食,由此特征可推论出,有没有美洲狮的出没?