阳离子滴定剂

This is Scientific American's 60-Second Science. I'm Adam Hinterthuer. This will just take a minute. Youve probably chased a fly or two around the house this summer. And, chances are, it took a few swings before you brought down the buzzing nuisance.

发表于:2018-12-02 / 阅读(139) / 评论(0) 分类 Scientific American(八)月

[全屏观看] 点击右键- 另存为 可保存这个Flash影片

发表于:2018-12-12 / 阅读(158) / 评论(0) 分类 北美小学生英语一年级教材(牛津英语教材)

World Hepatitis Day is observed on May the 19th. It aims to increase awareness worldwide of the diseases hepatitis B and hepatitis C. Its hope is to encourage the prevention and diagnosis of these two diseases, and increase the number of people who r

发表于:2018-12-29 / 阅读(104) / 评论(0) 分类 英语课程学习计划和讲义

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文,请发贴到 听力原文收集区 ,您将会获得10到30积分的奖励! Thank you!

发表于:2018-12-30 / 阅读(125) / 评论(0) 分类 单词解析速记

Youve given some thought to oxygen, carbon, uranium. But youve probably never mused about the element ytterbium, symbol Yb. A new study by scientists at the National Institute of Standards and Technology, or NIST, says that ytterbium could find a rol

发表于:2019-01-08 / 阅读(109) / 评论(0) 分类 Scientific American(八)月

PUSSY-CAT AND QUEEN Pussy-cat, pussy-cat, Where have you been? Ive been to London To look at the Queen. Pussy-cat, pussy-cat, What did you there? I frightened a little mouse Under the chair.

发表于:2019-01-09 / 阅读(424) / 评论(0) 分类 鹅妈妈童谣

The U.S. Special Inspector General for Iraq Reconstruction has criticized the State Department for its management of nearly $3 billion in contracts and grants in Iraq. In two reports, auditors cited weak and ineffective State Department oversight of

发表于:2019-01-13 / 阅读(180) / 评论(0) 分类 VOA标准英语2010年(一月)

Stomach cancer is one of the deadliest diseases, and ranks second among cancers worldwide with at least 800,000 deaths yearly. But in the United States, the number of cases has been declining, except for among one group of Americans. Glenda Reimer, h

发表于:2019-01-13 / 阅读(118) / 评论(0) 分类 VOA标准英语2010年(五)月

At Scripps Research Institute in Jupiter, Florida, scientists are working to find clues about how the human brain processes memories. Their laboratory test animal is not a chimp or a dog or a rat animals that we know can remember things it is the com

发表于:2019-01-13 / 阅读(149) / 评论(0) 分类 VOA标准英语2010年(三月)

Tit for Tat针锋相对An American lady traveling in England some years ago, got into an compartment of a smoking carriage where an Englishman was smoking a pipe. For a short time she sat quietly expecting that the Englishman would stop smoking. But

发表于:2019-01-28 / 阅读(131) / 评论(0) 分类 英语小达人

Beginners. Black, red, green, light blue, silver, orange, swords, lazers, helmets, shields, flying machines, underwater vehicles. The list could go on. What do these words refer to? Bionicles. They are a type of lego. You can buy them in boxes to put

发表于:2019-01-28 / 阅读(137) / 评论(0) 分类 英语博客 A cup of English

72 约翰斯·霍普金斯疟疾协会 DATE=7-19-01 TITLE=SCIENCE REPORT - Johns Hopkins Malaria Institute BYLINE=Jill Moss (Start at 01'0

发表于:2019-01-30 / 阅读(161) / 评论(0) 分类 科技之光

Offering Substitute 提供代用品 Specimen Letters1. Offering Rayon in Place of Watered Silk提供人造丝代替水洗丝Dear Sirs,Thank you for your fax of yesterday (April 3) with your order No.456 for 5,000 metres of 100cm wide watered silk. We

发表于:2019-02-05 / 阅读(170) / 评论(0) 分类 实用英语

Jim let his dog out to relieve himself late one night. He watched some TV, and then remembered to let the dog back in. When he opened the door, he was shocked at what he saw! In his dog's mouth was his neighbor's cat, dead! Bad dog! BAD DOG! said the

发表于:2019-02-07 / 阅读(152) / 评论(0) 分类 趣味英语

A certain cook,rather more educated than his fellows,went from his kitchen one day to a neighbouring tavernhe was of a serious turn of mind,and on that day he celebrated the anniversary of a friend's death-leaving a cat at home,to guard his

发表于:2019-02-07 / 阅读(151) / 评论(0) 分类 趣味英语

Dick and His Cat I Once there was a boy called Dick. He was very poor: his father and mother were dead and he had no friends to help him. One day he heard some men speaking: one man said, I shall go to London, for London is a very big city, and its s

发表于:2019-02-07 / 阅读(363) / 评论(0) 分类 趣味英语

An old woman had a cat. The cat was very old; she could not run quickly, and she could not bite, because she was so old. One day the old cat saw a mouse; she jumped and caught the mouse. But she could not bite it; so the mouse got out of her mouth an

发表于:2019-02-07 / 阅读(151) / 评论(0) 分类 趣味英语

There were many mice in a house. The man of the house got a cat. The cat killed many of the mice. Then the oldest mouse said, All mice must come to my hole tonight, and we will think what we can do about this cat.' All the mice came. Many mice spoke,

发表于:2019-02-07 / 阅读(174) / 评论(0) 分类 趣味英语

Here's seven things I learned on my terrifyingly dark road to happiness. 以下是我在通往幸福的可怕黑暗道路上学到的7件事 1. It happens when you least expect it. 1.它发生在你最不抱希望的时候。 It's so annoying but it'

发表于:2019-02-07 / 阅读(122) / 评论(0) 分类 阅读空间

美国习惯用语第859:怒气冲冲地大喊大叫(音频) rant and rave 昨天晚上我去参加一个社区居民大会,会上有位太太发言,她反对在社区增设交通标志,颇有一种控诉的感觉。我虽然主张大家各抒已

发表于:2019-03-14 / 阅读(368) / 评论(0) 分类 美国习惯用语
学英语单词
amhts
as crazy as a bed-bug
Bang Pa Han
battlefield missile
bergognones
biomedical nuclear imaging
bitter magnet
braced door
bullhead shark
change keys
characterization technique
conade
conjugate direction algorithm
connection in use
contextualizers
copper rockfish
corruptively
crocetin
delirium cordis
deoxy-oligonucleotide
descriptor type
desmodium gyroides (roxb.)dc.
dictyosporange
dipped article
diurnal variability
dominant lethal
double-stage turbine
draught horse
El Pocito
electrocorticography
electronic binary multiplying computer
enamelized variable resistor
fadil
false morel
first dollar coverage
fixed joint
front jockey wheel
gyri profundi cerebri
hash out
have no quarrel against
Hebrew Union College
hyoscytamine
inobservances
interview data
jargon (jargoon)
Jew's-harpists
Kanizsa triangle
Lallan
license mark
linear resistance flowmeter
machine notation
mad staggers
many-windowed
matchest
medicine tin
meningococcus conjunctivitis
millibarn
Misrepresentation Act
Miyazawa
msr
normal profit pricing
novendenary
orle
osalis griffithii edgew et hook. f.
palmyra fibre
paper linings
Pataudi
percentage utility loss
peroxydol
pilus tortus
pit-heads
President Arthur
primary viviparae
prove a point
psychomathematics
punctured neighborhoods
put one's finger s in the fire
re-booking
recycle hydrogen
reverse-T3
rokeya
roll-on
scoliotic pelvis
seen the light
Simón, Pico
space technology
stage 2 system definition
steerable hydrofoil
Stoke's law
tela gelatinosa
testamentary succession
the property market
Todrūyeh
trapping spot
uninterrogable
utps
Vasiodon
visible spectrums
what gives
wind direction diagram
woven-wire