单位面积声欧姆

[00:39.65][00:03.26]Unit 8 Adventure [00:05.80]Culture Corner The Silk Road [00:09.15]The routes [00:10.24]For centuries, the Silk Road [00:11.94]was the most important line [00:13.58]of communication connecting East and West. [00:16.92]Although the

发表于:2018-12-04 / 阅读(337) / 评论(0) 分类 北师大版高中英语模块3

Unit 2 Section A Pre-reading Activities First Listening Please listen to a short passage carefully and prepare to answer some questions. Second Listening Listen to the tape again. Then answer the foll

发表于:2018-12-04 / 阅读(149) / 评论(0) 分类 高级英语 下

by Jason Marshall The last article about how to use math to send encrypted messages ended with a bit of a cliffhanger. The good news is that you will soon find out how the story ends. But, as I warned last time, the bad news is that that isnt going t

发表于:2018-12-07 / 阅读(79) / 评论(0) 分类 数学英语

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(91) / 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(94) / 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(98) / 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(126) / 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(143) / 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(123) / 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(148) / 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(97) / 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(104) / 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(103) / 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(82) / 评论(0) 分类 Scientific American(八)月

[00:00.00]Unit 27 [00:05.46]Listening and speaking [00:07.25]4 You are going to listen to a radio interview [00:11.08]with Dr. Chen Lisha, an expert [00:13.77]on communication skills. [00:16.30]Rosemary, what are the most common situations [00:18.75]

发表于:2019-01-10 / 阅读(237) / 评论(0) 分类 北师大版高中英语模块9(选修)

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(105) / 评论(0) 分类 2015年VOA慢速英语(九)月

Boston Symphony Makes Music in Mountains When Serge Koussevitzy, the Russian-born conductor of the Boston Symphony Orchestra, opened Tanglewood in 1937, he chose an all-Beethoven program, including the Pastorale Symphony. When conductor Christoph von

发表于:2019-01-13 / 阅读(88) / 评论(0) 分类 VOA标准英语2012年(七月)

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(117) / 评论(0) 分类 VOA标准英语2009年(十一月)

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(107) / 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(135) / 评论(0) 分类 实用英语
学英语单词
acyrthosiphon evodia
air space for roof insulation
anti-Compton shield
areal concentration
be comparable with
be gun
bed rest experiment facilities
bedded chert
beekley gauge
blackout curtain
bromopentanone
calcots
carbon black
cauks
chinkuei shin chewan pills
choregraphy
clew up a sail
come to do
contraband of war
cooperative shop
dangled
demodulated
digital transduser
Dison
documentation and readout system
electrolytic theory of dissociation
elevator machine beam
entry corridor
epoxy ethane fumigation
esophagostomy interna
expression forceps
fastraverse platen press
featherdom
finger type contact
finvs
fruit of someone's loins
fulminant glaucoma
gagnoa
give your best
glipa
gunkanmaki
habuba
HIBAC
hypoproteinemia
inverted pelvis
koskinen
Lamellariidae
large motor start blocking control
licnesse
lillard
low background shield
lukeward
Maksutov corrector
Mayor's scarf
medium phosphor cast iron brake shoe
messiahs
methodology of science and technology
methyl-mercuric chloride
mispersoned
movable propeller blade
muriate of ammonia
NFB (negative feedback)
nociceptins
non-lossy
noncareful
number of molecules
oxygen installation
participative leader
pelagic trawling
postbranchial body
predegraded
primula
prostomatidae
public class
publicly-funded
quartz with step motor watch
ranchless
reconnaissance vehicle
rice seedling puller
Russophones
shoepac
short-cut analysis
signal detection and estimation
singing-stovepipe effect
slit type cracking test
sodium meate
spaghetti western
spatial variables measurement
special purpose op amp
specific drug
Sporobolomycetaceace
straight enamel
sulfite oxidase
swsesastshsesrs-s
Tan-Tan, Prov.de
teenous
teletype request-send
timberdoodle
transductor controller
Union Vale
very high speed computer
white metal liner