向上移動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)動慣量 轉(zhuǎn)動慣量(Moment of Inertia)是剛體繞軸轉(zhuǎn)動時慣性（回轉(zhuǎn)物體保持其勻速圓周運(yùn)動或靜止的特性）的量度，用字母I或J表示。 在經(jīng)典力學(xué)中，轉(zhuǎn)動慣量（又稱質(zhì)量慣性矩，簡稱慣距）通J是英語中的一個重要元音字母，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？一起來看看吧。 ? “j常以I 或J表示，SI 單位為 kg·m2。對于一個質(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)動慣量在旋轉(zhuǎn)動力學(xué)中的角色相當(dāng)于線性動力學(xué)中的質(zhì)量，可形式地理解為一個物體對于旋轉(zhuǎn)運(yùn)動的慣性，用于建立角動量、角速度、力矩和角加速度等數(shù)個量之間的關(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，希望對大家有一定的幫助。更多英語相關(guān)信息，可以關(guān)注滬江網(wǎng)查詢。 ? 特別提醒：如果您對英語學(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，量身定制高效實用的個性化學(xué)習(xí)方案，專屬督導(dǎo)全程伴學(xué)，掃一掃領(lǐng)200暢學(xué)卡。

距離2024年下半年英語六級口試越來越近了，大家準(zhǔn)備的如何？為了幫助同學(xué)們更好地備考六級口試，@滬江英語四六級微信公眾號給大家整理了英語六級口試歷年真題匯總，一起來看看吧。 以下是2020年11月至2018年11月的部分大學(xué)英語六級口語考試題目??： 2020年11月英語六級口語考試題目 網(wǎng)絡(luò)視頻分享的普及 The popularization of online video sharing Following the rapid development of social media apps, people no longer need to meet friends face

2024年12月英語六級考試在即，同學(xué)們也要認(rèn)真?zhèn)淇寂?。今天@滬江英語四六級微信公眾號為大家?guī)?024年12月英語六級翻譯預(yù)測：圓明園，希望對你有所幫助。 2024年12月英語六級翻譯預(yù)測：圓明園 圓明園(Yuanmingyuan Imperial Garden)位于北京西郊，于1708年開始興建。經(jīng)過幾十年的建造、裝飾和改建，圓明園成為當(dāng)時世界上最出色的園林之一。圓明園繼承了中國園林建筑的傳統(tǒng)，把不同風(fēng)格的園林建筑融為一體，充分體現(xiàn)出和諧與完美。除此之外，圓明園在世界園林建筑史上也占有非常重要的地位。遺憾的是，經(jīng)過幾場戰(zhàn)爭，今天的圓明園只是一片廢墟。 參考譯文 Located

距離2024年12月英語六級考試只有一個月啦，各位小伙伴準(zhǔn)備的如何？今天@滬江英語四六級微信公眾號為大家準(zhǔn)備了2024年12月英語六級閱讀理解全真模擬題（1），檢驗一下最近的學(xué)習(xí)成果。一起來看看吧~ 2024年12月英語六級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閱讀模擬題，希望大家利用好最后的一個月認(rèn)真?zhèn)淇?。祝大家能順利通過考試

理了2024年12月英語六級閱讀理解模擬真題：大學(xué)專業(yè)選擇，一起來看看吧。 2024年12月英語六級閱讀理解模擬真題：大學(xué)專業(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，旨在說明不同專業(yè)的畢業(yè)生有不同的經(jīng)濟(jì)回報，并非要傳授發(fā)財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)，后一個分句即前一個分句的理由，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。通過下文數(shù)據(jù)earnings 25% higher和get 10-15% extra可以推測lucrative大意應(yīng)為“給人帶來豐厚收入的”,故選C。 　　4.[C]?事實細(xì)節(jié)題。第4段中出現(xiàn)了幾個比較數(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 表明這類學(xué)生收人增加25%的參照對象是沒讀大學(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,要想答六對此題,一定要仔細(xì)體會本文末句。本文雖然重點(diǎn)討論文科沒有經(jīng)濟(jì)效益，但是作者并沒有做出主觀判斷，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)過程更有趣，故D符合作者意思。

六級口試在即，同學(xué)們準(zhǔn)備的如何？為了幫助同學(xué)們更好地備考六

中文小說，這個時候就改看雙語對照的?？吹臅r候一定要注意關(guān)注每個作者的用詞偏好。 這些文章中常常會反復(fù)出現(xiàn)某些?？吹y記的單詞，或某個單詞的多項用法，而一詞多用熟詞僻義恰巧是四六級單詞在閱讀中的考點(diǎn)。 ② 聽力材料要多跟讀多背誦。 “老師！我聽力完全聽不懂啊……” 其實要是論考試各個模塊的實際文章難度，聽力怕是比較簡單的了，因為沒有任何文字參考，全靠大家通過聽才能做對題，那么相對來說，聽力的材料用詞就比較簡單地道，但是聽不懂往往是因為發(fā)音不夠精準(zhǔn)，不知道單詞怎么讀，自然就聽不出來。 所以建議大家把聽力材料作為備戰(zhàn)四六級的突破口，可以每天抽出一段時間，將歷年真題中的對話進(jìn)行跟讀、背誦，熟讀每一個句子，這對口語就會有很大提高。 其次，聽力原文里無論是對話還是語段，都會有生詞出現(xiàn)，對于這些詞匯，大家更需要多加背誦，好好利用聽力原文，會大有收獲哦~ ③ 要想聽懂還需多聽寫。 跟得上聽力材料只是第一步，但是要想聽懂，還要去嘗試做精聽和聽寫哦~ 精聽訓(xùn)練總共分三步： 第一步，準(zhǔn)備一段聽力材料； 第二步，不看題目不看選項，直接一句一句聽寫

一題答案一般在開頭，聽到啥選啥準(zhǔn)沒錯 ? 2??第二題一般和第六級聽力是很多人過級的攔路虎，其實，六一題靠近，所以這段時間一定打起十二分精神去聽，如果聽到 but/now/in fact這種提示詞，后邊緊接著是答案，注意同義轉(zhuǎn)換 ? 3??第三題一般靠后，也就是說第二題聽完后可以放松一點(diǎn)去仔細(xì)讀讀這一題的選項，當(dāng)聽到 as a consequence/ However/ second/ cause/third/so far 些提示詞出現(xiàn)時，也就答案句子了，選最匹配的? 4??基本符合視聽一致的原則，聽到什么就選什么 ?屠皓民領(lǐng)銜 四六級通關(guān)神器? ??????基礎(chǔ)班·沖刺押題班·白金班 直播錄播相結(jié)合，基礎(chǔ)強(qiáng)化沖刺全包括 ??不同水平，靈活選擇班型 $課程限時優(yōu)惠6折起

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距離2024年12月英語六級考試越來越近，同學(xué)們準(zhǔn)備的如何？很多同學(xué)好奇12月份的六級考試是不是要比6月份的六級考試難？今天@滬江英語四六級微信公眾號跟大家做出解答，希望對你有所幫助。 1.四六級成績詳解 首先，四六級考試是水平測試而非選拔考試。詳解如下：四六級考試的滿分為710分，成績單只報告總分及聽、讀、寫譯三個單項的成績。 四六級成績單官方規(guī)定不設(shè)及格線，但一般四級達(dá)到425分及以上即可參加六級考試。所以，一般社會上、高校及用人單位采用425分作為及格線。 四六級成績從原始的100分換算成710分的過程較為復(fù)雜。簡單點(diǎn)來說：四六級的總分以及單項成績反應(yīng)的是考生在本次參加四六級所有考生中