单词:sound intensity transmission coefficient
单词:sound intensity transmission coefficient 相关文章
Medical Microbiology医学微生物学 adenovirus 腺病毒 adsorption 吸附 aerobe 需氧菌 aflatoxin 黄曲霉毒素 airborne transmission 空气传播 amantadine 金刚烷胺 anaerobe 厌氧菌 anthrax 炭疽 antigenic drift 抗原漂移,抗原转
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
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Dialogue 4 BUYING A SECOND-HAND CAR Laurance- What kind of a car do you have? Soony--- An old one. Laurance- I know it's old, but what make is it? Soony-- - It's a Chevrolet. Why do you ask? You going
Dialogue 4 BUYING A SECOND-HAND CAR Laurance- What kind of a car do you have? Soony--- An old one. Laurance- I know it's old, but what make is it? Soony-- - It's a Chevrolet. Why do you ask? You going
Dialogue 4 Laurance- What kind of a car do you have? Soony--- An old one. Laurance- I know it's old, but what make is it? Soony-- - It's a Chevrolet. Why do you ask? You going into the car business? L
坚持不懈,直到成功。 我们每天的奋斗就像对参天大树的一次砍击,头几刀可能了无痕迹。每一击看似微不足道,然而,累积起来,巨树终会倒下。这恰
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
NOEL KING, HOST: OK. If you listen to the hit podcast Serial, you know the name Adnan Syed. The podcast was about his murder conviction in 2000. But an appeals court in Maryland has backed a decision that vacated his conviction, and Syed might be get
SCOTT SIMON, HOST: A year ago, President Trump's remarks about a violent white nationalist rally in Charlottesville sparked outrage. (SOUNDBITE OF ARCHIVED RECORDING) PRESIDENT DONALD TRUMP: You had a group on one side that was bad, and you had a gro
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
Adult ants communicate with pheromones, touch and even sound. Now researchers have discovered that developing ants called pupae have their own distinctive calls, which identify their social status within the colony. This finding is in the journal Cur
This is scientific American ,60 second science. Im Chris D..ta. Got a minute? In less you have a pair of noise-cancel headphones. Flying can be annoying to the ears. A lot of low-pitch rumbling makes it into the cabin. The problem is ,the wings ,floo
HARI SREENIVASAN: The U.S. Food and Drug Administration today asked blood centers in two in Florida counties to suspend blood donations until each unit can be screened for the Zika virus. This comes as state health officials investigate four non-trav
每年的12月1日是世界艾滋病日,今年中国的宣传主题是合力抗艾,共担责任,共享未来。 请看相关报道: Six out of every 10,000 people in China may be infected with HIV/AIDS, according to official figures revealed
一篇文章的各个段落之间、各个句子之间都存在一定的逻辑关系,正确理解这样的逻辑关系对于阅读者有着很重要的意义:首先,借助上下文之间的逻辑关系,阅读者能够更好地理解文章大意
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
Human Echolocators Use Tricks Similar to Bats Many bats use a system similar to sonar to navigate in the dark. They send out high frequency sound, sometimes as clicks, and get information about their surroundings by the timing and quality of the soun
台湾同胞 Taiwan compatriots 台湾、香港、澳门保持原有的资本主义制度和生活方式长期不变 Taiwan, Hong Kong and Macao will retain the current capitalist system and way of life for a long time to come. 炭疽 anthrax 踢皮球