胎盘哺乳动物

More than 16 mammals species like the famous fly squirrel have adapted the ability to sail from tree to tree, thrilling Yes, but what is the evolutionary advantages. One theory suggests gliding saves energy, so researchers test that idea using colugo

发表于:2018-12-24 / 阅读(106) / 评论(0) 分类 Scientific American(七)月

This is Scientific Americans 60 Second Science, I am Cynthia Graber, this will just take a minute~ Want to suss out the existence of a shy mammal in a tropical jungle? Just check a bloodsucking leech. Scientists estimate that about a quarter of the w

发表于:2018-12-24 / 阅读(90) / 评论(0) 分类 Scientific American(四)月

It really is rocket scienceresearchers are using huge x-ray scanners from NASA to understand how sonar might be affecting the hearing of large ocean mammals. These scanners are usually used to inspect the space shuttles solid fuel rockets. Navy sonar

发表于:2018-12-24 / 阅读(97) / 评论(0) 分类 Scientific American(十一)月

Some people eat to avoid being bored. Others to avoid doing something theyd rather not, like preparing a podcast. Now a report says we might eat to avoid fungi. Because warm-bloodedness, a condition that requires a lot of calories, may have evolved t

发表于:2018-12-24 / 阅读(68) / 评论(0) 分类 Scientific American(十)月

UNIT 34 NATURE (I) ANIMAL WORLD Lesson 67 Part I UNIT 34 NATURE (I) ANIMAL WORLD Lesson 67 Part I Warming-up Exercises Spot Dictation: Animals Unlike most plants, animals are living ____ that have the

发表于:2018-12-27 / 阅读(70) / 评论(0) 分类 英语听力入门 (全四册)

谈到视角,很多同学可能会问,当我谈论视角的时候,我在说什么。看以下GRE考试中的一句话: The large number of physiological and behavioral similarities between birds and mammals, which have separate evolutionary h

发表于:2019-01-03 / 阅读(100) / 评论(0) 分类 GRE英语

Conservationists are overestimating the number of species that have been driven to extinction(消失), scientists have said. A study has found that a third of all mammal species declared extinct in the past few centuries have turned up alive and well

发表于:2019-01-07 / 阅读(86) / 评论(0) 分类 英语新闻

This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. Climate change affects seasonal eventsspring flowers open earlier, songbirds breed sooner. But what about mammals? A new study documents the effect on a

发表于:2019-01-08 / 阅读(80) / 评论(0) 分类 Scientific American(六)月

Mammals 哺乳动物 What animals can produce milk for their babies? Mammals. 什么动物能为它们的宝宝产奶?哺乳动物。 Dogs, pigs, elephants, lions, dolphins and bats are examples of mammals. 猪,狗,大象,狮子,海豚和蝙蝠

发表于:2019-01-10 / 阅读(120) / 评论(0) 分类 与美国小学生一起学英文第8册

VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Bob Doughty. VOICE TWO: And I'm Barbara Klein. This week, we will tell about mammal populations in danger of disappearing. We will also tell about one kind of animal that disappeared

发表于:2019-01-11 / 阅读(119) / 评论(0) 分类 VOA慢速英语2008年(十一)月

Could Rising Temperatures Mean Smaller Mammals? Scientists say in the ancient past, higher temperatures meant smaller mammals. Theyre studying how a brief, but dramatic climate change event affected body size. Its called the Paleocene-Eocene Thermal

发表于:2019-01-14 / 阅读(84) / 评论(0) 分类 VOA标准英语2012年(二月)

[00:04.83]Lesson 13 [00:08.64]1.Learn to say [00:12.79]I'm going to talk about six types of animals. [00:16.34]我要说一说六种动物. [00:17.67]The first type-mammals.第一种--哺乳动物. [00:21.11]People are mammals.人类就是哺乳动物

发表于:2019-01-15 / 阅读(230) / 评论(0) 分类 闽教版小学英语六年级下

在托福考试中,得阅读者得天下,为此上海新东方小编从词汇,题材,题型,解题方法等几大模块入手,为您精心整理了托福阅读技巧攻略的完整版,以方便广大考生备考。 托福阅读的词汇问

发表于:2019-01-17 / 阅读(74) / 评论(0) 分类 托福英语

托福阅读的词汇问题似乎是大家一向比较有争议的一件事情,有的人认为托福阅读只要四级甚至高中的词汇量就可以搞定,但是有的人觉得单词背得多多益善,还要尽量多背一些专业词汇。其

发表于:2019-01-17 / 阅读(85) / 评论(0) 分类 托福英语

托福阅读的词汇问题似乎是大家一向比较有争议的一件事情,有的人认为托福阅读只要四级甚至高中的词汇量就可以搞定,但是有的人觉得单词背得多多益善,还要尽量多背一些专业词汇。其

发表于:2019-01-17 / 阅读(83) / 评论(0) 分类 托福英语

Then a strange thing happened. 这时,一件神秘的事情发生了。 All the gigantic reptiles died within a short time. 所有这些庞大的爬行动物在短时间内悉数灭绝。 We do not know the reason. 我们不知道其中的原因。

发表于:2019-01-21 / 阅读(93) / 评论(0) 分类 美国学生人类历史

Lyell's oversights were not inconsiderable. He failed to explain convincingly how mountain ranges were formed and overlooked glaciers as an agent of change. He refused to accept Louis Agassiz's idea of ice agesthe refrigeration of the globe, as he di

发表于:2019-01-29 / 阅读(72) / 评论(0) 分类 万物简史

57 这种动物是人类的祖先吗? DATE=6-13-01 TITLE=SCIENCE REPORT - Ancestor of Humans BYLINE=Jill Moss (Start at 59

发表于:2019-01-30 / 阅读(153) / 评论(0) 分类 科技之光

? 澄清托福阅读单词问题的两个误区? 托福阅读的词汇问题似乎是大家一向比较有争议的一件事情,有的人认为托福阅读只要四级甚至高中的词汇量就可以搞定,但是有的人觉得单词背得多多益

发表于:2019-02-09 / 阅读(70) / 评论(0) 分类 托福英语

睡眠革命 Evolution of sleep Sleep is very ancient. In the electroencephalographicsense we share it with all the primates and almost allthe other mammals and birds: it may extend back asfar as the reptiles. There is some evidence that the two type

发表于:2019-02-12 / 阅读(69) / 评论(0) 分类 托福英语
学英语单词
a wad of bills
Abraham's bosom
adularescence
alkoxylate
ancylose
angelfire
available for shipment
ballistic case
bathygadus nipponicus
beche-de-mer
belttype pickup
body-centered cubic crystal
boron filament
bottom sampler
capital owner
carbon ribbon apply indicator
cephalomotor
character data
Chart of Time Zones of the World
Coluria oligocarpa
condescent
cosmophysics
cylinder performance
davallia vestita
denematize
during the passage
economic data
emergency closing device
engine chart
ercans
farhang
fineness-of-grind gauge
friction slip coupling
get on towards
get togethers
given particulars
glycopattern
hallowedly
hemorrhagic otitis
Hydrochoeridae
I'm worried
incaceration
infinite dilution resonance integral
isobutyl propionate
Itaverava
Keuka L.
kings of the hill
Landtags
legal techniques
lowering-speed control valve
Lyford Cay
Manacor
marble-dome
measurement goods
medial angle of eye
megacentres
mildew resistance
model diagnostic checking
moditied constant-voltage charge
multipurpose programme
net positive suction head required for pump
oll korrect
panulirus peniciliatus
pennycuick
pipe die
Polo'a
poulsons
puridoxine hydrochloride
quirns
radiogeophysics
ram sth home
recruitees
relativized cryptography
respiratory dead space
reversible adiabatic change
rnzfb
sarcomatous neuroma
scaleton
second order maximum condition
signalling network
sintering character
solid business firm
spectroscopic temperature
steal heart
steel wire rope stranding-bundling machine
stimulated transition frequence
suction curette
sunstead
technoentrepreneurship
test point
Tomistoma
toy industry
trackwhilescan
trigooa subpineale
Tyndall scattering light
unsteady flow
untreated effluent
uranometrical
usoc
VM (virtual machine)
water-to-carbide type generator
white silky paper