饱水率试验

路易斯安那遭遇历史性洪水 已致11人死亡 play pause stop mute unmute max volume 00:0002:14repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or update your Flash plugin. O

发表于:2018-12-02 / 阅读(169) / 评论(0) 分类 CNN美国有线新闻2016年8月

The U.S. state of California has been suffering a historic drought. Three years ago, its governor declared a drought state of emergency. Late last year, 97 percent of California was in drought. But today, the U.S. drought monitor says less than 60 pe

发表于:2018-12-02 / 阅读(136) / 评论(0) 分类 CNN美国有线新闻2017年1月

The northeast just had its first big snow of the season. Meanwhile, on Titan, it was foggy. That weather report brought to you by researchers publishing in the journal Astrophysical Journal Letters. The scientists found that Titan, Saturns largest mo

发表于:2018-12-02 / 阅读(154) / 评论(0) 分类 Scientific American(十二)月

TERMINAL TEST Part I Listening Comprehension (15 minutes) Directions: This part is to test your listening ability. It consists of 3 sections. Section A Directions: This section is to test your ability

发表于:2018-12-07 / 阅读(208) / 评论(0) 分类 当代考试

Agriculture Report - Getting to the Root of How to Water Trees This is the VOA Special English Agriculture Report. Some trees can survive a long time without water. Think of trees that grow in the desert. But other trees may need more moisture than t

发表于:2018-12-07 / 阅读(188) / 评论(0) 分类 2011年VOA慢速英语(八)月

Floods Challenge Midwest Farmers On his land outside Peoria, Darrel Kammeyer is keeping one eye on the rising Illinois River and another on the only thing standing between it and his farmland, a seven-meter-tall levee. It was constructed to hold back

发表于:2018-12-16 / 阅读(107) / 评论(0) 分类 VOA标准英语2013年(四月)

[00:03.58]You will hear three pieces of recorded material. [00:08.15]Before listening to each one,you'll have time to [00:12.59]read the questions related to it. [00:16.25]While listening,answer each question by choosing A,B,C or D. [00:22.13]After l

发表于:2018-12-27 / 阅读(231) / 评论(0) 分类 最新版英语听力教程

[00:00.00]1.W:I think I'll take my mother to that French restaurant on Main Street for her birthda [00:08.15]M:I hope it's not any time soon.They are usually booked up weeks in advanc [00:14.37]Q:What does the man mean? [00:18.44]2.M:Did you notice t

发表于:2018-12-30 / 阅读(166) / 评论(0) 分类 英语四级听力练习集锦

Fog Found on Saturn's Moon Titan A study in Astrophysical Journal Letters reveals that Titan may be home to the familiar atmospheric condition known as fog--but made out of methane. Karen Hopkin reports The northeast just had its first big snow of th

发表于:2019-01-02 / 阅读(147) / 评论(0) 分类 60秒科学

AS IT IS 2015-08-06 Olympic Committee to Test Rio's Water for Viruses Rio de Janeiro, Brazil is busy preparing for the 2016 Olympics. On Sunday, the International Olympic Committee said it will begin testing the waters where swimmers and other athlet

发表于:2019-01-12 / 阅读(141) / 评论(0) 分类 2015年VOA慢速英语(八)月

Will There be Enough Water for Everyone? As the global population grows, so does the need for water. The Worldwatch Institute says increased demands for food, energy and industry, along with climate change, could lead to water scarcity in some places

发表于:2019-01-14 / 阅读(123) / 评论(0) 分类 VOA标准英语2013年(三月)

解决非洲水和燃料的办法 Governments of developing countries in Africa often lack the resources and infrastructure to solve the everyday problems of their inhabitants. But every so often, authorities and local entrepreneurs find low-tech sol

发表于:2019-01-14 / 阅读(135) / 评论(0) 分类 VOA标准英语2015年(十二月)

Low-tech Solutions Found for Africa's Everyday Problems 低技术含量的解决方案解决非洲日常问题 Governments of developing countries in Africa often lack the resources and infrastructure to solve the everyday problems of their inhabitan

发表于:2019-01-14 / 阅读(131) / 评论(0) 分类 VOA标准英语2015年(七月)

AUDIE CORNISH, HOST: The BP disaster in the Gulf of Mexico seven years ago showed just how hard it is to combat a massive oil spill. Cleaning oil from water is a challenge, especially on the open sea. Now the federal government is backing research on

发表于:2019-01-16 / 阅读(135) / 评论(0) 分类 2017年NPR美国国家公共电台3月

RACHEL MARTIN, HOST: It used to be the only place to find great television was on the big broadcast networks, then cable was where all the best stuff was airing. More recently, Netflix and Amazon have been racking up the Emmys. And now Apple wants a

发表于:2019-01-16 / 阅读(139) / 评论(0) 分类 2017年NPR美国国家公共电台1月

综合性商港comprehensive commercial seaport春意盎然spring is very much in the air forest coverage森林覆盖率 global warming全球变暖 principal element主要因素 toxic emission废气排放www.examw.com 迸发出心灵的火花ignite t

发表于:2019-01-17 / 阅读(136) / 评论(0) 分类 英语口译

This is Scientific Americans 60-Second Science. I am Synthia Graber. Got a minute? Wander where and when the next major river flood would had, just look up to the satellites. Conventional estimates a river volumes come from rain fall of course and fr

发表于:2019-01-20 / 阅读(122) / 评论(0) 分类 2014年Scientific American(七)月

By Melinda Smith Washington, DC 11 January 2007 watch Heart Disease Blood Test The World Health Organization (WHO) says that cardiovascular disease causes approximately one third of all deaths worldwide (16.7 million). And those deaths are not just

发表于:2019-02-03 / 阅读(168) / 评论(0) 分类 2007年VOA标准英语(一月)

US satellite observations have produced the first strong evidence for water flowing on Mars. 美国卫星观测找到了火星表面存在液态水的首批强有力证据。 The water is a brine saturated in salts such as perchlorates. As it seeps d

发表于:2019-02-11 / 阅读(133) / 评论(0) 分类 英语新闻

Frost-free Freeze Physics 昇華是指一种物质从固态不经过液态直接转化为气态的过程,是物质在温度和气压低于三相点的时候发生的一种物态变化。与昇華相反的过程称做凝華,指物质从气态直接变

发表于:2019-02-18 / 阅读(122) / 评论(0) 分类 英语听力文摘 English Digest
学英语单词
3H-DHA
adenoviruses
affrontous
agglomerated flux
aluminum busbar
antisubmarine suport aircraft carrier
apparent equilibrium
arbeau
beer-lambert's rule
bi-state
boom heel block
brite
bush chain
capacitance unbalance protection device
conditioned satiey
daee
David Glacier
de-asphaltizing
deenergisation
diphenylene-oxide
discotic phase
donilon
downscale protection
dumlu dagi
enclosed track type switchboard
errorists
falling duet
falling market
fast coupling
femalish
flue liner
forced burning
forensics
formylation
fromia
full service reduction
gear burr machine
get on sb's nerves
grave-dancing
great person theory
greetingless
gymnopaedic
heartist
heteromyids
honeycomb in concrete
horizontal sorting
hydroatmospheric
ice-water path
Immunization strategy
import foreign goods
imta
in the cut
inclination pitch
infraglacial
instrument observation
Judea
kitscher
last access
Law Commission
lubricating oil temperature
mackintoshite
magnetoreceptive
mercuric ballast
miling
military versatility
monitorless
Mvangan
n-nitroso
noise-power measurement
noncontractual claims
nonreset counter
outsentries
ovist
perichondral bone
Piedimonte Etneo
pinking irons
pressure cookers
prototyping component
quick defrosting
range transmitter
Rateau turbine
re-embrittlement
Rychwał
samite
scanning sonobuoy
scientific interest
scratcher chain saw
screen ruling
selectron storage
serotypeable
slave-makers
sodium lauryl ether sulfate
straight-side slot
styrylpyrones
sweep frequency
Tamul
the Queen Mary
u.p.
untrimmed floor
WAGR syndrome
zero of measuring instrument