向上移動(dòng)1米距離所作的功為1焦耳。 1J=1w·s=1A·V·s，即1瓦的機(jī)械工作1秒的釋放的能量為1焦耳，3.6*10^6J=1kwh,即1度，是電的常用單位。 ? 擴(kuò)展資料 J——轉(zhuǎn)動(dòng)慣量 轉(zhuǎn)動(dòng)慣量(Moment of Inertia)是剛體繞軸轉(zhuǎn)動(dòng)時(shí)慣性（回轉(zhuǎn)物體保持其勻速圓周運(yùn)動(dòng)或靜止的特性）的量度，用字母I或J表示。 在經(jīng)典力學(xué)中，轉(zhuǎn)動(dòng)慣量（又稱(chēng)質(zhì)量慣性矩，簡(jiǎn)稱(chēng)慣距）通J是英語(yǔ)中的一個(gè)重要元音字母，但它的發(fā)音似乎比其他字母要稍微復(fù)雜一些。究竟復(fù)雜在哪里呢？一起來(lái)看看吧。 ? “j常以I 或J表示，SI 單位為 kg·m2。對(duì)于一個(gè)質(zhì)點(diǎn)，I = mr2，其中 m 是其質(zhì)量，r 是質(zhì)點(diǎn)和轉(zhuǎn)軸的垂直距離。 轉(zhuǎn)動(dòng)慣量在旋轉(zhuǎn)動(dòng)力學(xué)中的角色相當(dāng)于線性動(dòng)力學(xué)中的質(zhì)量，可形式地理解為一個(gè)物體對(duì)于旋轉(zhuǎn)運(yùn)動(dòng)的慣性，用于建立角動(dòng)量、角速度、力矩和角加速度等數(shù)個(gè)量之間的關(guān)系。 ? 以上是為大家介紹的j英文字母怎么發(fā)音的相關(guān)信息，希望對(duì)大家有一定的幫助。更多英語(yǔ)相關(guān)信息，可以關(guān)注滬江網(wǎng)查詢。 ? 特別提醒：如果您對(duì)英語(yǔ)學(xué)習(xí)感興趣，想要深入學(xué)習(xí)，可以了解滬江網(wǎng)校精品課程，量身定制高效實(shí)用的個(gè)性化學(xué)習(xí)方案，專(zhuān)屬督導(dǎo)全程伴學(xué)，掃一掃領(lǐng)200暢學(xué)卡。

準(zhǔn)是： 單果直徑22mm-24mm，標(biāo)識(shí)是L，即Large; 單果直徑24mm-26mm，標(biāo)識(shí)是 XL，即Extra Large; 單果直徑26-28mm俗稱(chēng)“單鉤”，標(biāo)識(shí)是J，即Jumbo; 單果直徑28-30mm俗稱(chēng)“雙鉤”，標(biāo)識(shí)為XJ\SJ\JJ，即Super Jumbo; 單果直徑30-32mm稱(chēng)“3鉤”，標(biāo)識(shí)為G\P\XSJ\SXJ\XXJ\SSJ ，即Giant; 單果直徑32mm以上稱(chēng)“4鉤”，標(biāo)識(shí)為XG\SG\XP\SP\XXXJ\XXSJ 。 此外，對(duì)車(chē)?yán)遄右?guī)格級(jí)別的劃分還有另一種方式。 目前，美國(guó)和加拿大等北半球國(guó)家以“Row”(俗稱(chēng)“行號(hào)”)為標(biāo)準(zhǔn)對(duì)車(chē)?yán)遄舆M(jìn)行分級(jí)。行號(hào)越小，車(chē)?yán)遄釉酱?車(chē)?yán)遄拥拇笮《嘣?號(hào)行和12號(hào)行之間變化。 除此之外，車(chē)?yán)遄雍竺婵赡苓€會(huì)跟一些其他字母，比如：JL、JR、JD，這些字母表示的就是不同的顏色。 L：light 淺色 R：red 紅色 D：dark 深色 最常見(jiàn)的就是JD，顏色比較深。 網(wǎng)絡(luò)英語(yǔ)培訓(xùn)班哪家好?不少人還在糾結(jié)這個(gè)問(wèn)題，讓你真正能夠?qū)W到知識(shí)的才是好。如果您對(duì)英語(yǔ)學(xué)習(xí)感興趣，想要深入學(xué)習(xí)，可以了解滬江網(wǎng)校精品課程，量身定制高效實(shí)用的個(gè)性化學(xué)習(xí)方案，專(zhuān)屬督導(dǎo)全程伴學(xué)，掃一掃領(lǐng)200暢學(xué)卡。

出現(xiàn)的習(xí)語(yǔ)! 3.唱英文歌。 4.注意每一個(gè)單詞的卷舌[r]和尾音，每個(gè)短語(yǔ)、句子的音變現(xiàn)象。 二、如何練好個(gè)人的英文發(fā)音 1.Listen to yourself：如果你聽(tīng)不到自己的發(fā)音問(wèn)題，要糾正就很難了。試著把你講的話錄下來(lái)并和英語(yǔ)為母語(yǔ)的人士對(duì)比一下。 2.Slow down：很多英語(yǔ)學(xué)習(xí)者常說(shuō)語(yǔ)速太快容易養(yǎng)成他們的壞習(xí)慣。由于太快而說(shuō)得含糊不清是口語(yǔ)考試的大忌。所以我們要先“準(zhǔn)確”然后再要求速度。 3.Picture it：閉上你的眼睛并在說(shuō)出口之前想一想如何發(fā)這個(gè)音。想象口型和臉部動(dòng)作。這個(gè)可以配合看電影來(lái)做，留意好萊塢的明星是怎么樣一字一句的說(shuō)出那些令人聽(tīng)著很舒服的話語(yǔ)的。 4.Get physicall：發(fā)音是個(gè)形體動(dòng)作。要學(xué)會(huì)嘴巴的發(fā)聲方法和移動(dòng)肌肉的方式，可以每天集中訓(xùn)練幾個(gè)音。 5.Watch yourself：站在鏡子前查看你發(fā)某些固定音時(shí)的嘴型，唇型和舌頭的位置，并和你看到的英語(yǔ)母語(yǔ)者的發(fā)音進(jìn)行對(duì)比，平時(shí)還可以把自己的發(fā)音錄下來(lái)，仔細(xì)觀察比較。 三、英語(yǔ)發(fā)音訓(xùn)練方法 1.學(xué)好48個(gè)音標(biāo)。可以利用電腦或手機(jī)軟件學(xué)習(xí)每個(gè)音標(biāo)的口型、舌位，并多次練習(xí)，力求準(zhǔn)確。 2.音標(biāo)學(xué)好了，單詞也就不成問(wèn)題了。讀單詞的時(shí)候把每一個(gè)元音發(fā)飽滿，輔音發(fā)到位。 3.單詞解決了，下一步是語(yǔ)句的發(fā)音。在這里要注意斷句以及前后兩個(gè)單詞之間的連音。比如 a big egg, big 和 egg 就要連著發(fā)音。 有的學(xué)生會(huì)說(shuō)，即使這樣我還是發(fā)不好音，那建議看一些簡(jiǎn)單的英文電影，像《冰河世紀(jì)》《海底總動(dòng)員》之類(lèi)的，跟著影片復(fù)述對(duì)話，不僅對(duì)個(gè)人的發(fā)音有幫助，對(duì)掌握英語(yǔ)口語(yǔ)中的語(yǔ)調(diào)、語(yǔ)氣也很有益處。 以上就是小編給大家分享的英語(yǔ)發(fā)音練習(xí)方法，希望可以給大家學(xué)習(xí)帶來(lái)幫助。 如果您對(duì)英語(yǔ)學(xué)習(xí)感興趣，想要深入學(xué)習(xí)，可以了解滬江網(wǎng)校精品課程，量身定制高效實(shí)用的個(gè)性化學(xué)習(xí)方案，專(zhuān)屬督導(dǎo)全程伴學(xué)。掃一掃領(lǐng)200暢學(xué)卡

2024年12月英語(yǔ)六級(jí)考試將在12月14日下午舉行，大家在考前要認(rèn)真?zhèn)淇寂丁＝裉霡滬江英語(yǔ)四六級(jí)微信公眾號(hào)為大家整理了2024年12月英語(yǔ)六級(jí)閱讀理解模擬真題：猿類(lèi)，一起來(lái)練習(xí)吧。 2024年12月英語(yǔ)六級(jí)閱讀理解模擬真題：猿類(lèi) Questions 11 to 15 are based on the following passage Among all the animals, the ape is most like human beings. Both people and apes have the similar brain structure, the similar

2024年12月英語(yǔ)六級(jí)考試將在12月14日下午舉行，同學(xué)們準(zhǔn)備的如何？今天@滬江英語(yǔ)四六級(jí)微信公眾號(hào)為大家整理了2024年12月英語(yǔ)六級(jí)閱讀理解模擬真題：地震，一起來(lái)看看吧。 2024年12月英語(yǔ)六級(jí)閱讀理解模擬真題：地震 A) An earthquake is one of the most terrifying phenomena that nature can dish up. We generally think of the ground we stand on as “rock-solid” and completely stable. An earthquake can

2024年12月英語(yǔ)六級(jí)考試將在12月14日下午舉行，大家要認(rèn)真復(fù)習(xí)哦。今天@滬江英語(yǔ)四六級(jí)微信公眾號(hào)為大家整四六理了2024年12月英語(yǔ)六級(jí)閱讀理解全真模擬題（2），希望對(duì)你有所幫助。 　　2024年12月英語(yǔ)六級(jí)閱讀理解全真模擬題（2） ? ? ? ?I live in the land of Disney, Hollywood and year-round sun. You may think people in such a glamorous, fun-filled place are happier than others. If so, you have some mistaken ideas about the nature of happiness. 　　Many intelligent people still equate happiness with fun. The truth is that fun and happiness have little or nothing in common. Fun is what we experience during an act. Happiness is what we experience after an act. It is a deeper, more abiding emotion. 　　Going to an amusement park or ball game, watching a movie or television, are fun activities that help us relax, temporarily forget our problems and maybe even laugh. But they do not bring happiness, because their positive effects end when the fun ends. 　　I have often thought that if Hollywood stars have a role to play, it is to teach us that happiness has nothing to do with fun. These rich, beautiful individuals have constant access to glamorous parties, fancy cars, expensive homes, everything that spells “happiness”. But in memoir after memoir, celebrities reveal the unhappiness hidden beneath all their fun: depression, alcoholism, drug addiction, broken marriages, troubled children and profound loneliness. 　　Ask a bachelor why he resists marriage even though he finds dating to be less and less satisfying. If he’s honest, he will tell you that he is afraid of making a commitment. For commitment is in fact quite painful. The single life is filled with fun, adventure and excitement. Marriage has such moments, but they are not its most distinguishing features. 　　Similarly, couples that choose not to have children are deciding in favor of painless fun over painful happiness. They can dine out ever they want and sleep as late as they want. Couples with infant children are lucky to get a whole night’s sleep or a three-day vacation. I don’t know any parent who would choose the word fun to describe raising children. 　　Understanding and accepting that true happiness has nothing to do with fun is one of the most liberating realizations we can ever come to. It liberates time: now we can devote more hours to activities that can genuinely increase our happiness. It liberates money: buying that new car or those fancy clothes that will do nothing to increase our happiness now seems pointless. And it liberates us from envy: we now understand that all those rich and glamorous people we were so sure are happy because they are always having so much fun actually may not be happy at all. 　　1.Which of the following is true? 　　A.Fun creates long-lasting satisfaction. 　　B.Fun provides enjoyment while pain leads to happiness. 　　C.Happiness is enduring whereas fun is short-lived. 　　D.Fun that is long-standing may lead to happiness. 　　2.To the author, Hollywood stars all have an important role to play that is to __. 　　 memoir after memoir about their happiness. 　　 the public that happiness has nothing to do with fun. 　　 people how to enjoy their lives. 　　 happiness to the public instead of going to glamorous parties. 　　3.In the author’s opinion, marriage___. 　　s greater fun. 　　 to raising children. 　　tes commitment. 　　 in pain. 　　4.Couples having infant children___. 　　 lucky since they can have a whole night’s sleep. 　　 fun in tucking them into bed at night. 　　 more time to play and joke with them. 　　 happiness from their endeavor. 　　5.If one get the meaning of the true sense of happiness, he will__. 　　 playing games and joking with others. 　　 the best use of his time increasing happiness. 　　 a free hand to money. 　　 himself with his family. 參考答案:CBCDB 以上就是今天的學(xué)習(xí)內(nèi)容啦。大家要利用好最后一個(gè)月的時(shí)間多多練習(xí)，并且多進(jìn)行模考熟悉考試流程。小編預(yù)祝大家順利通過(guò)英語(yǔ)六級(jí)~

滬江英樂(lè)：Jessie J 新單《Masterpiece》！該曲出自她于今年10月10日發(fā)行的第三張錄音室專(zhuān)輯《Sweet Talker》。這支MV帶你一起感受結(jié)石姐的一天，這樣的偶像還真的很接地氣的呢！ 【Jessie J 新單《Masterpiece》】 歌詞： So much pressure, why so loud? If you don't like my sound, you can turn it down I gotta road And I walk it alone Uphill battle, I look good when I climb I'm

距離2024年12月英語(yǔ)六級(jí)考試越來(lái)越近了，大家要認(rèn)真復(fù)習(xí)哦。今天@滬江英語(yǔ)四六

距離2024年12月英語(yǔ)六級(jí)考試只有一個(gè)月啦，各位小伙伴準(zhǔn)備的如何？今天@滬江英語(yǔ)四六級(jí)微信公眾號(hào)為大家準(zhǔn)備了2024年12月英語(yǔ)六級(jí)閱讀理解全真模擬題（1），檢驗(yàn)一下最近的學(xué)習(xí)成果。一起來(lái)看看吧~ 2024年12月英語(yǔ)六級(jí)閱讀理解全真模擬題（1） Without regular supplies of some hormones our capacity to behave would be seriously impaired; without others we would soon die. Tiny amounts of some hormones can modify moods and actions, our inclination to eat or drink, our aggressiveness or submissiveness, and our reproductive and parental behavior. And hormones do more than influence adult behavior; early in life they help to determine the development of bodily form and may even determine an individual’s behavioral capacities. Later in life the changing outputs of some endocrine glands and the body’s changing sensitivity to some hormones are essential aspects of the phenomena of aging. Communication within the body and the consequent integration of behavior were considered the exclusive province of the nervous system up to the beginning of the present century. The emergence of endocrinology as a separate discipline can probably be traced to the experiments of Bayliss and Starling on the hormone secretion. This substance is secreted from cells in the intestinal walls when food enters the stomach; it travels through the bloodstream and stimulates the pancreas to liberate pancreatic juice, which aids in digestion. By showing that special cells secret chemical agents that are conveyed by the bloodstream and regulate distant target organs or tissues. Bayliss and starling demonstrated that chemical integration could occur without participation of the nervous system. The term “hormone” was first used with reference to secretion. Starling derived the term from the Greek hormone, meaning “to excite or set in motion. The term “endocrine” was introduced shortly thereafter “Endocrine” is used to refer to glands that secret products into the bloodstream. The term “endocrine” contrasts with “exocrine”, which is applied to glands that secret their products though ducts to the site of action. Examples of exocrine glands are the tear glands, the sweat glands, and the pancreas, which secrets pancreatic juice through a duct into the intestine. Exocrine glands are also called duct glands, while endocrine glands are called ductless. 1.What is the author’s main purpose in the passage? A.To explain the specific functions of various hormones. B.To provide general information about hormones. C.To explain how the term “hormone” evolved. D.To report on experiments in endocrinology. 2.The passage supports which of the following conclusions? A.The human body requires large amounts of most hormones. B.Synthetic hormones can replace a person’s natural supply of hormones if necessary. C.The quantity of hormones produced and their effects on the body are related to a person’s age. D.The short child of tall parents very likely had a hormone deficiency early in life. 3.It can be inferred from the passage that before the Bayliss and Starling experiments, most people believed that chemical integration occurred only___. sleep. the endocrine glands. control of the nervous system. strenuous exercise. 4.The word “l(fā)iberate” could best be replaced by which of the following? A.Emancipate B.Discharge C.Surrender D.Save 5.According to the passage another term for exocrine glands is___. glands ine glands ss glands inal glands. 答案：BDCBA 以上就是今天的六級(jí)閱讀模擬題，希望大家利用好最后的一個(gè)月認(rèn)真?zhèn)淇?。祝大家能順利通過(guò)考試

理了2024年12月英語(yǔ)六級(jí)閱讀理解模擬真題：大學(xué)專(zhuān)業(yè)選擇，一起來(lái)看看吧。 2024年12月英語(yǔ)六級(jí)閱讀理解模擬真題：大學(xué)專(zhuān)業(yè)選擇 　　One of the bitterest and most time-worm debates in student union bars up and down the country is resolved as academic research confirms that in financial terms at least, arts degrees are a complete waste of time.Getting through university boosts students’earnings by 25%, on a weighted average, or $220,000 over theirlifetime, according to Professor Ian Walker of Warwick University-but if they study Shakespeare or the peasants’revolt instead of anatomy of contract law, those gains are likely to be completely wiped out. 　　The government is about to allow universities to charge students up to $3,000 a year for their degrees, arguing that it’s a small price to pay compared with the financial rewards graduates reap later in life. But Prof. Walker’s research shows there are sharp variations in returns according to which subject a student takes. 　　Law, medicine and economics or business are the most lucrative choices, making their average earnings 25% higher, according to the article, published in the office for national statistics’monthly journal. Scientists get 10-15% extra. At the bottom of the list are arts subjects, which make only a “small ”differenceto earnings- a small negative one, in fact. Just ahead are degrees in education-which leave hard pressed teachers anaverage of 5% better off a year than if they had left school at 18. 　　“it’s hard to resist the conclusion that what students learn does matter a lot; and some subject areas givemore modest financial returns than others,” Prof. Walker said. As an economist, he was quick to point outthat students might gain non-financial returns from arts degrees:”Studying economics might be very dull, forexample, and studying post-modernism might be a lot of fun.” 　　練習(xí)題： 　　Choose correct answers to the question: 　　1.What is the best title for the passage? 　　A.Professor Walker’s Research 　　B.How to Make Big Money. 　　C.Differences Between Science and Arts Degrees. 　　D.Studying Arts Has Negative Financial Outcome. 　　2.Universities charge students a rather high tuition mainly because_____ 　　 provide the students with very prosperous subjects to learn 　　 assume that their graduates can earn much more than they had paid 　　 don’t get financial support from the government 　　 need much revenue to support the educational expenses 　　3.The word “l(fā)ucrative”(Line 1, Para. 4) most probably means _____ 　　le 　　ve 　　able 　　le 　　4.Law, medical and business graduates could earn 25% more than ______ 　　ion graduates 　　 graduates 　　 who had not studied at the university 　　 average income 　　5.We can safely conclude that the author ______ 　　s arts degrees as meaningless 　　 this result disappointing and unfair 　　 the students to think twice before they decide what to learn in college 　　 that arts degrees are still rewarding despite its scarce financial returns 　　1.[D]?主旨大意題。本文為Walker教授的研究成果，旨在說(shuō)明不同專(zhuān)業(yè)的畢業(yè)生有不同的經(jīng)濟(jì)回報(bào)，并非要傳授發(fā)財(cái)心得或者比較文理科的異同。文章首句即為本題解題關(guān)鍵，故D正確。 　　2.[B]?事實(shí)細(xì)節(jié)題。定位至第3段第1句。本文只有這一句與收取學(xué)費(fèi)有關(guān)，后一個(gè)分句即前一個(gè)分句的理由，抓住其中隱含的因果關(guān)系就不難找到正確答案。 　　3.[C]?詞義理解題。通過(guò)下文數(shù)據(jù)earnings 25% higher和get 10-15% extra可以推測(cè)lucrative大意應(yīng)為“給人帶來(lái)豐厚收入的”,故選C。 　　4.[C]?事實(shí)細(xì)節(jié)題。第4段中出現(xiàn)了幾個(gè)比較數(shù)字，考題要求找到此段首句提到的收人增加25%的參照點(diǎn)。第2段第1句中的Getting through university 表明這類(lèi)學(xué)生收人增加25%的參照對(duì)象是沒(méi)讀大學(xué)的人，且從第4段第3句中的the list和第4句即可以確定這一段是在比較大學(xué)畢業(yè)與18歲畢業(yè)(即沒(méi)讀大學(xué))收入的不同，因此C正確。 　　5.[D]?推理判斷題。結(jié)論往往出現(xiàn)在文章結(jié)尾,要想答四六對(duì)此題,一定要仔細(xì)體會(huì)本文末句。本文雖然重點(diǎn)討論文科沒(méi)有經(jīng)濟(jì)效益，但是作者并沒(méi)有做出主觀判斷，故A、B、C都不正確，而作者在文章最后講到了人文學(xué)科雖然經(jīng)濟(jì)效益不佳但學(xué)習(xí)過(guò)程更有趣，故D符合作者意思。