声透射系数,透声系数

9) The number of violent acts on televisions in the past years __ has increased __ (increase) from about 19 to 27 per hour. (15A 2004 上 ) 10) Your mind _ will keep ___ (keep) up with your reading sp

发表于:2018-12-01 / 阅读(197) / 评论(0) 分类 自考英语(一)78讲

wretched incidence broaden trader coefficient ass forthcoming loom elapse imperative reckless coupon conversion lily scorch soften conception abide attendance chunk craft count shorthand villa blond intellect

发表于:2018-12-01 / 阅读(223) / 评论(0) 分类 用Mp3背六级单词

When Pablo Panda Sandoval made history with 3 home runs in game one of the world series his head was probably buzzing. But when batters in chilly Detroit had the ball not quite right in the next couple of the nets, it will be their hands that buzzing

发表于:2018-12-24 / 阅读(105) / 评论(0) 分类 Scientific American(十)月

This is Scientific American's 60-second Science. I'm Steve Mirsky. Got a minute? Can you name those notes? Probably not. Perhaps one in ten thousand speakers of European languages has perfect pitch - the ability to recognize a note without having hea

发表于:2018-12-24 / 阅读(117) / 评论(0) 分类 Scientific American(五)月

This is Scientific American's 60-second Science. I'm Karen Hopkin. If you ever got picked on in the schoolyard, you might have wished for some sort of superpower, like unbeatable speed or maybe just the ability to completely disappear. Now scientists

发表于:2018-12-24 / 阅读(119) / 评论(0) 分类 Scientific American(五)月

Scientists analyzed around 2,500 of those calls, and found that the second part (sound) is nearly identical in pitch every time from each whale: 16 hertz, or four octaves below middle C. And the slight variations in frequency that do exist are only a

发表于:2019-01-02 / 阅读(146) / 评论(0) 分类 60秒科学

Hybrid cars are good for the environment. But scientists say that they might be bad for pedestrians. Because hybrids are so quiet, it can be hard for walkers to hear them until its too late. Listen to this. [quiet car sound] Thats a Toyota Prius mov

发表于:2019-01-02 / 阅读(165) / 评论(0) 分类 60秒科学

Can you name those notes? Probably notperhaps one in 10,000 speakers of European languages has perfect pitch, the ability to recognize a note without having heard any reference note first. But theres a much better chance you could successfully name

发表于:2019-01-02 / 阅读(144) / 评论(0) 分类 60秒科学

If you ever got picked on in the schoolyard, you might have wished for some sort of superpower: like unbeatable speed or maybe just the ability to completely disappear. Now scientists at the College of Wooster in Ohio say that you might have had a s

发表于:2019-01-02 / 阅读(174) / 评论(0) 分类 60秒科学

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Every year, scores of manatees are killed by boats in Floridas waters. Their plight is an ecological concern. And everyone from marine biologists to Marg

发表于:2019-01-08 / 阅读(118) / 评论(0) 分类 Scientific American(十一)月

This is Scientific American's 60-second Science. I'm Karen Hopkin. This will just take a minute. Hybrid cars are good for the environment, but scientists say that they might be bad for pedestrians. Because hybrids are so quiet that can be hard for wa

发表于:2019-01-08 / 阅读(126) / 评论(0) 分类 Scientific American(五)月

We humans are pretty good at communicating with sounds other than words. But how much of this is hard-wired, and how much do we pick up from others? To find out, researchers recorded the nonverbal sounds of people born deaf, as they responded to a ra

发表于:2019-01-08 / 阅读(146) / 评论(0) 分类 Scientific American(十一)月

Blue whales off the California coast make calls that, sped up 10 times, sound like (sound of two-part call). The original is a wall-rattling frequency too low for us to hear. Scientists analyzed around 2,500 of those calls, and found that the second

发表于:2019-01-08 / 阅读(104) / 评论(0) 分类 Scientific American(八)月

3.基尼系数 Gini coefficien 国家统计局局长马建堂首次披露过去10年全国居民基尼系数的变化后,北京也将适时公布本地区的基尼系数。 Beijing will release its own Gini coefficient for 2012, a National Bureau o

发表于:2019-01-08 / 阅读(140) / 评论(0) 分类 英语笔译

Country Music Ladies Put Men in Their Place American country music lyrics often describe women as they might appear in mens dreams. This is especially true of songs by many male artists. But the songs by Maddie Marlow and Tae Dye are different. The t

发表于:2019-01-12 / 阅读(126) / 评论(0) 分类 2015年VOA慢速英语(九)月

By Alisha Ryu Nairobi 18 November 2009 A U.S.-flagged container ship which was hijacked by Somali pirates seven months ago has been attacked again off the coast of Somalia. Pirates were unsuccessful in their second attempt to hijack the Maersk Alaba

发表于:2019-01-14 / 阅读(139) / 评论(0) 分类 VOA标准英语2009年(十一月)

China has long depended on coal-burning power plants to fuel its explosive growth over the past three decades. As a result, air pollution has risen to alarming levels in central and eastern regions. Policymakers have been working hard to shift the co

发表于:2019-01-19 / 阅读(174) / 评论(0) 分类 2017CRI中国国际广播电台

The Tiangong-2 space lab, though adopting the structure of Tiangong-1 without too many changes in appearance, has been designed to function much stronger than its predecessor. Zhu Congpeng, chief designer of the lab, says they've focused on a variety

发表于:2019-01-19 / 阅读(126) / 评论(0) 分类 2016CRI中国国际广播电台

通知与确认 Acknowledgments Confirmations 通知对方接到来信Acknowledging receipt of letters1. Dear Mr/Ms,Thank you for your letter No. A-3 of 6th May, offeringus 6 UI-4 Viewdatas. We have passed it on to ourTechnical Department for their c

发表于:2019-02-06 / 阅读(156) / 评论(0) 分类 实用英语

Voice 1 Thank you for joining us for todays Spotlight program. Im Liz Waid. Voice 2 And Im Rebekah Schipper. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice

发表于:2019-02-14 / 阅读(266) / 评论(0) 分类 环球英语 Spotlight
学英语单词
abnormalising
abusiveness
aeroparks
air-compressor crank shaft
antigangliosides
antirepressors
Bandraboua
Bescano
bladdry
Calaveras Res.
capping off
carmine red
centred conic
Chiba-ken
chromium sesquichloride
chry-
Cisterna terminalis
compo-mould
cordia alliodoras
country-western music
crookneck(pumpkin)
cross-stratum
Cyrus I
dai pai dongs
deep cutaneous cancer
Derobin
Desmodium reticulatum
DFLs
diapnoic
disk file control
dried-cherry
dry gravity separation
dysaethria erasaria
electro-hydraulicthruster
Endasiku
europeas
extend flip-flop
fast(-)track authority
foreburden
free return trajectory
gasoline upgrading
gauze bag
gonzaloes
GrayBalance
hexelasma velutinum
hippocampus sindonis
horizontal vertigo
ing (sn)
ink pad
insert string at every increme
instant interest
intersecting axle
kangaroo grass
kiffins
l.i.e
Latin American Economic System
LESO
library building
marine grey cloth
maritime mediation
meal-skipping
morphometrics
move in with sb
Napier
narrow beam geometry
Nodi lymphatici cervicales laterales superficiales
observing tubes
over-abstemious
pentamethide
people-watchings
perico
petworth
piston-ring flutter
plasma oscillation analyzer
praenomen
pre-industrial prototype
proprietary product
pygmaein
rainfall erosivity
rinse down
SALVTNG
schizophrenic psychosis
select alternatives
semiepiphytes
shopfitting
sibling nodes
SMNB
steel wire core
supramaximal stimulus
Tangerine Seed Pill
taper dowel
Taraxacum roseoflavescens
Telosma procumbens
throws it
tumor immunology
vecs
video frequency signal transmission
vine fruit
Wedensky's phenomenon
weighting method of physical quantity
Welfare Island
Yinchuan