声学单位

Review of Units1-6 [00:03.81]2a Listen and number the pictures[1-4]. [01:11.89]2b Read the sentences below. [01:17.45]Then listen again and circle T(for true)of F(for false). [01:25.71]The boy is Nick Smith. T F [01:42.35]Nick doesn't like his class.

发表于:2018-12-13 / 阅读(249) / 评论(0) 分类 新目标初中英语七年级

Review of units 1-6 [00:04.70]3a Listen to the four conversations. [00:10.87]Match the conversations with the correct pictures. [02:18.03]3b Listen again and follow the instructions next to the pictures. [04:26.79]Review of units 1-6 to expressions [

发表于:2018-12-13 / 阅读(175) / 评论(0) 分类 新目标初中英语八年级上

Review of units 7-12 [00:03.89]3a Listen to the four conversations. [00:09.85]match the conversations with the correct pictures. [02:37.31]Listen again and follow the instructions next to the pictures. [05:05.06]Review of units 7-12 [05:14.02]topping

发表于:2018-12-13 / 阅读(196) / 评论(0) 分类 新目标初中英语八年级上

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(89) / 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(89) / 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(90) / 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(122) / 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(140) / 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(119) / 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(139) / 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(95) / 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(100) / 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(96) / 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(79) / 评论(0) 分类 Scientific American(八)月

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(100) / 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(82) / 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(113) / 评论(0) 分类 VOA标准英语2009年(十一月)

Review of units 11-15 [00:04.78]2a Listen to the four conversations. [00:10.66]Match the conversations with the correct pictures. [04:08.56]2b Listen again and follow the instructions above next to the pictures. [08:11.05]Review of units 11-15 [08:19

发表于:2019-01-16 / 阅读(247) / 评论(0) 分类 新目标初中英语九年级(全一册)

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(99) / 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(133) / 评论(0) 分类 实用英语
学英语单词
a SSP
A-61827
acrokinesis
aging biology
Ahvenanmaa Islands
alkaline accumulators
allardyces
amethoprine
animated cursor
anti-ecology
astronomic latitude
axle-neck lathe
Barabinskaya Nizmennost'
bear raids
Boehmeria oblongifolia
bolt wire
Bou Kahil, Dj.
break-even approach
cabbage-greens
calcium lactate pentahydrate
candy kiss
classic classified materia medica for emergency
clayely
Cloquet's space
cobalt carbonate
cobaltous acetate tetrahydrate
consolidated account expenditure
constituent isotopes
Covian
Delphinium iliense
dermatitis factitia
dislocation substructure
drill string compensator
eight-foot-deep
endo-exocrine
epilachna microgenitalia
equality-of-brightness photometer
ERDP-1
euglena spirogyra spirogyra
FLUF
food deserts
foxiness
full system method
furnish
gnvq intermediate
grand-daughters
half a minute
honest and upright
hotan
ideal burning
index myopia
index set spitting
insert card
international promissory note
james clark rosses
Jenghiz Khan
judgement thief
K13176
kirby pins
knbc
knocker up
lampshade hats
levinasian
line turn around delay
liquid polypropylene
manyfacted
mullinger
national budget execution
nictindole
NTSC colour TV system
nutation drive unit
ollenhauer
optical data links
parasporal crystal
pealing
pitch-and-putt
promammal
provoster
quick access time-sharing file
ratio of quick asset to current liability
ribisi
sararimen
sarracenia
Senecio coriaceisquamus
service tenancy
shore mile
sitzfleisch
space traveler
sparticles
spewest
straight base rim
tumour cell embolus
unguligrade
Vaccinium dunnianum
vassiliev
western crab apples
whiskery
wire-tappings
yamataimine
yammy
zaghareet
zingale