弱酸性阳离子交换树脂

This is Scientific American's 60 Second Science. I'm Steve Mirsky, got a minute? The Meridiana Planum region of Mars once had water that was really soft and highly acidic, conditions in incredibly hostile to any life forms that we know about. So any

发表于:2018-12-24 / 阅读(51) / 评论(0) 分类 Scientific American(二)月

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Landfills produce methanewhich can be valuable as an energy source. But scientists haven't known why landfills make so much methane. The solid waste in

发表于:2019-01-08 / 阅读(106) / 评论(0) 分类 Scientific American(四)月

This is Scientific American 60 second Science, I am Sophie Bushwick, got a minute~ Theyre called hydogels: Jell-O-like materials made of networks of long-chain molecules in water. And theyre as flexible as living tissue. But hydrogels could not recov

发表于:2019-01-08 / 阅读(54) / 评论(0) 分类 Scientific American(三)月

Education Report - American Documents the Countrys First Exchange Students from China This the VOA Special English Education Report. Many thousands of Chinese are studying at schools in the United States. And writer Liel Leibovitz says the students a

发表于:2019-01-12 / 阅读(52) / 评论(0) 分类 2012年VOA慢速英语(九)月

如果你爱喝葡萄酒或经常遇到要喝葡萄酒的场合,学几句高大上的品酒英语尤其重要。 品葡萄酒本节课的重点词汇: 1) wine tasting 葡萄酒品酒会2) tasting flight 品酒序列3) Cabernet Sauvignon 赤霞珠4)

发表于:2019-01-22 / 阅读(50) / 评论(0) 分类 美国文化脱口秀

Childhood and Poetry One time, investigating in the backyard of our house in Temuco the tiny objects and minuscule beings of my world, I came upon a hole in one of the boards of the fence. I looked through the hole and saw a landscape like that behin

发表于:2019-02-08 / 阅读(36) / 评论(0) 分类 英语作文
学英语单词
a healthful diet
adaptive Web site
adiabatic warming
airport light beacon
american management association
antanxiety
asarum fargesii franch.
avoiding chord
barr
be engrossed in
benthophyte
brute force focussing
callionymus meridionalis
cognitive assessment
coil flux guide
computerized axial tomography scanners
Daïro
demo group
Diallvlmalonylurea
dithiooxamide
Doppler positioning by the short arc method
dual-gap rewrite head
economic rent
emulsion albuminuria
fixing by landmark
formal language processing
Fort Washakie
fructuating
fumetto
geobiologist
geochronologic
Georgian
got away with
guanidoacetic acid
Gusinje
h(a)ematoxin
habitances
hang-fire
head rod
history lists
Holland Centre
home projector
impact-grab boring machine
insulogenic
internal cylindrical gauge
it is likely that
J. I. L.
light benzol
lupinus arboreuss
meroveches
mobile target tracking system
multiple inheritance
nasal plug
naturists
Nishigō
oligonecrospermia
one-third maximum wave
out of one's sight
poiana richardsoni
Poole Harbour
potential device
pound per cubic foot
preceed
pressure amplitude
pressure control tool
programmable keypad
pseudocaeciliids
putty gun
ranus
rebound play
red field
relay intercropping
replicating function
revolution transmitter
rhabdion
sadkers
safety protection system
Schiefferdecker's theory
self-confessed
Severskiy Donets(Sivers'kyy Donets')
sigmoidconduit
single-acting power unit
slim hole rig
software documentation effectiveness
somat-
spectrum parameter
staurosporin(STSN)
structural parameter
synchondroses neuroceatral
teleroentgenotherapy
three wheel plow
tightener sheave
title to the provision
Totomitsa
tribrachial ileothoracopagus
Turing machine
uncup
uniform precession
wheel-well
Y-valve
zoanthodeme
zootrophy