冲击系数的变化范围是（）。A、1≤kim≤1.7B、1≤kim≤1.8C、1≤kim≤1.9D、1≤kim≤2
冲击系数的变化范围是（）。
- A、1≤kim≤1.7
- B、1≤kim≤1.8
- C、1≤kim≤1.9
- D、1≤kim≤2
相关考题：
共用题干The Bilingual BrainWhen Karl Kim immigrated to the United States from Korea as a teenager,he had a hard time learning English.Now he speaks it fluently, and he had a unique opportunity to see how our brains adapt to a second language.As a graduate student, Kim worked in the lab of Joy Hirsch, a neuroscientist in New York Their work led to an important discovery.They found evidence that children and adults don't use the same parts ofthe brain when they learn a second language.The researchers used an instrument called an MRI(magnetic resonance imaging)scanner to study the brains of two groups of bilingual people.One group consisted of those who had learned a second language as children.The other consisted of people who,like Kim,learned their second language later in lite.Peoplefrom both groups were placed inside the MRI scanner ,This allowed Kim and Hirsch to see which parts of thebrain were getting more blood and were more active.They asked people from both groups to think about whatthey had done the day before ,first in one language and then the other.They couldn't speak out loudbecause any movement would disrupt（干扰）the scanning.Kim and Hirsch looked specifically at two language centers in the brain-Broca' s area, which isbelieved to control speech production,and Wernicke's area,which is thought to process meaning.Kim andHirsch found that both groups of people used the same part of Wernicke's area no matter what language theywere speaking.But their use of Broca's area was different.People who learned a second language as children used the same region in Broca's area for both tneir first and second languages.People who learned a second language later in life used a different part of Broca's area for their second language.How does Hirsch explain this difference?Hirsch believes that when language is first being programmed in young children,their brains may mix the sounds and structures of all languages in the same area.Once that programming is complete,the processing of a new language must be taken over by adifferent part of the brain.A second possibility is simply that we may acquire languages differently as children than we do asadults.Hirsch thinks that mothers teach a baby to speak by using different methods involving touch,sound and sight.And that is very different from learning a language in a high school or college class.Kim and Hirsch find that children______.A: use the same region in Broca's area to learn their first and second languageB:learn a second language slower than adultsC:are better at acquiring the sound system of a second language than adultsD:use special parts of the brain to program the structures of their first language
共用题干The Bilingual BrainWhen Karl Kim immigrated to the United States from Korea as a teenager,he had a hard time learning English.Now he speaks it fluently, and he had a unique opportunity to see how our brains adapt to a second language.As a graduate student, Kim worked in the lab of Joy Hirsch, a neuroscientist in New York Their work led to an important discovery.They found evidence that children and adults don't use the same parts ofthe brain when they learn a second language.The researchers used an instrument called an MRI(magnetic resonance imaging)scanner to study the brains of two groups of bilingual people.One group consisted of those who had learned a second language as children.The other consisted of people who,like Kim,learned their second language later in lite.Peoplefrom both groups were placed inside the MRI scanner ,This allowed Kim and Hirsch to see which parts of thebrain were getting more blood and were more active.They asked people from both groups to think about whatthey had done the day before ,first in one language and then the other.They couldn't speak out loudbecause any movement would disrupt（干扰）the scanning.Kim and Hirsch looked specifically at two language centers in the brain-Broca' s area, which isbelieved to control speech production,and Wernicke's area,which is thought to process meaning.Kim andHirsch found that both groups of people used the same part of Wernicke's area no matter what language theywere speaking.But their use of Broca's area was different.People who learned a second language as children used the same region in Broca's area for both tneir first and second languages.People who learned a second language later in life used a different part of Broca's area for their second language.How does Hirsch explain this difference?Hirsch believes that when language is first being programmed in young children,their brains may mix the sounds and structures of all languages in the same area.Once that programming is complete,the processing of a new language must be taken over by adifferent part of the brain.A second possibility is simply that we may acquire languages differently as children than we do asadults.Hirsch thinks that mothers teach a baby to speak by using different methods involving touch,sound and sight.And that is very different from learning a language in a high school or college class.It can be inferred from the last paragraph that______.A:students do better in high school than in collegeB:bilingual children will learn better in college classesC:mothers are good language teachersD:it takes more time for adults to learn a second language
如图所示，各元件参数标于图中，取基准功率为SB=100MVA，当线路末端f点发生三相短路时，短路点的短路冲击电流iim和最大有效值电流Iim分别为（ ）。（短路冲击系数取kim=1.8） A． 6.68kA，3.95kA B． 5.47kA，3.36kA C． 7.25kA，4.30kA D． 8.98kA，5.62kA
Question 61-63 refer to the following email.To: Barry Weinstein （bweinstein@celgar.com）From: Andrew Kim （akim@celgar.com）Subject: Next monthDate: August 3Barry,Thanks again for arranging that videoconference last week. I just heard form Maxine Dawson, our account manager for the Johnson Company account, that the next product trial will be September 8 in their production plant in Denver. She has requested that I fly D. A presenter at an award ceremony.out there with her. Of course, I still plan to attend the Engineering Society awards dinner in San Francisco on September 9, so I've booked a flight there after the meeting. Let me know whenyou‘ll be arriving there.I'm looking forward to seeing you honored in San Francisco. You deserve it!Regards,Andrew KimCelgar AssociatesWho is Maxine Dawson?A. An employee at Celgar Associates.B. A manager at Johnson Company.C. A travel agent for Mr.Kim.D. A presenter at an award ceremony.
Questions 182-184 refer to the following e—mailBarry， Thanks again for arranging that videoconference last week．I just heard from Maxine Dawson，our account manager for the Johnson Company account，that the next product trial will be September 8 in their production plant in Denver．She has requested that I fly out there with her．of course，I still plan to attend the Engineering Society awards dinner in San Francisco on September9，SoI’ve booked a flight there after the meeting．Let me know when you’11 be arriving there．1’m looking forward to seeing you honored in San Francisco．You deserve it! Regards， Andrew Kim Celgar Associates Who is Maxine Dawson?A.An employee at Celgar Associates B.A manager at Johnson Company C.A travel agent for Mr．Kim D.A presenter at an award ceremony
共用题干The Bilingual Brain When Karl Kim immigrated to the United States from Korea as a teenager,he had a hard time learning English.Now he speaks it fluently,and he had a unique opportunity to see how our brains adapt to a second language.As a graduate student,Kim worked in the lab of Joy Hirsch,a neuroscientist in New York.______(46)They found evidence that children and adults don't use the same parts of the brain when they learn a second language. The researchers used an instrument called an MRI(magnetic resonance imaging)scanner to study the brains of two groups of bilingual people.______(47)The other consisted of people who,like Kim, learned their second language later in life.People from both groups were placed inside the MRI scanner.This allowed Kim and Hirsch to see which parts of the brain were getting more blood and were more active.They asked people from both groups to think about what they had done the day before,first in one language and then the other.They couldn't speak out loud because any movement would disrupt the scanning. Kim and Hirsch looked specifically at two language centers in the brain-Broca's area,which is believed to control speech production,and Wernicke's area,which is thought to process meaning.Kim and Hirsch found that both groups of people used the same part of Wernicke's area no matter what language they were speaking. ______(48) People who learned a second language as children used the same region in Broca's area for both their first and second languages.People who learned a second language later in life used a different part of Broca's area for their second language.______(49)Hirsch believes that when language is first being programmed in young children,their brains may mix the sounds and structures of all languages in the same area.Once that programming is complete,the processing of a new language must be taken over by a different part of the brain. A second possibility is simply that we may acquire languages differently as children than we do as adults.Hirsch thinks that mothers teach a baby to speak by using different methods involving touch'sound, and sight.______(50)______(46)A:But their use of Broca's area was different.B:One group consisted of those who had learned a second language as children.C:How does Hirsch explain this difference?D:We use special parts of the brain for language learning.E:And that is very different from learning a language in a high school or college class.F:Their work led to an important discovery.
定义JavaScript数组的正确方法是？（）A、var txt = new Array="tim","kim","jim"B、var txt = new Array(1:"tim",2:"kim",3:"jim")C、var txt = new Array("tim","kim","jim")D、var txt = new Array:1=("tim")2=("kim")3=("jim")
变压器微机保护中，设Idm为差动电流的幅值，Im2为偶次谐波的幅值，K为常数，It为门槛定值，偶次谐波原理的判据是（）。A、Idm＞KIm2，Idm＞ItB、Idm＜KIm2，Idm＜ItC、Idm＞Im2，Idm＞KIt
平板电脑，平板电视，现在是平板灯泡。世界是平的，这是弗里德曼创造的新鲜术语。设计师Joonhuyn Kim正在设法改善传统的白炽灯泡，这个理念很简单：平板灯泡可以占有较少的空间，所以成本就会降低。而且也容易包装，储存，运输。这种平板产品的设计体现了（）A、创新原则B、经济原则C、可持续发展原则D、道德原则
单选题In terms of nanotechnology, Kim was the first ______.Ato use it in washing machinesBto come up with the ideaCto introduce it to KoreaDto apply it to socks
单选题Selon la réglementation, Spanos, après avoir appris la disparition des jeunes gens,aurait dû _____.Aaller à leur recherche tout de suiteBaller les chercher 24 heures plus tardCdiscuter avec ses collèguesDaller chez Kim pour se renseigner
单选题Which of the following best describes the nature of Kim Hyung Gyoon’s work?AProduct development.BMarket investigation.CResearch designing.DSales promotion.
单选题Quand est-ce que les deux jeunes gens avaient été enlevés?ACe matin-là, pendant qu’Eric conduisait Kim au travail.BCe soir-là, quand Kim rentrait du travail.CDans la journée, pendant qu’ils louaient la chambre.DDans la journée, quand ils conduisaient pour aller au motel.