風(fēng)能就是地球表面大量空氣流動所產(chǎn)生的動能。據(jù)估算,全球風(fēng)能約為2.74×1012千瓦,其中可利用的風(fēng)能約為2×1010千瓦,比地球上可開發(fā)利用的水能總量要大10倍。 目前,風(fēng)力發(fā)電已經(jīng)成為風(fēng)能利用的主要形式。隨著經(jīng)濟的高速增長和能源消耗的持續(xù)上升,煤炭、石油等常規(guī)能源日益枯竭,環(huán)境持續(xù)惡化。
余幼時即嗜學(xué)。家貧,無從致書以觀,每假借于藏書之家,手自筆錄,計日以還。天大寒,硯冰堅,手指不可屈伸,弗之怠。錄畢,走送之,不敢稍逾約。以是人多以書假余,余因得遍觀群書。
十年春,齊師伐我。公將戰(zhàn),曹劌請見。其鄉(xiāng)人日:“肉食者謀之,又何間焉?”劌曰:“肉食者鄙,未能遠謀?!蹦巳胍姟枺骸昂我詰?zhàn)?”公曰:“衣食所安,弗敢專也,必以分人。”
京劇是流行全國的戲曲劇中之一。自清乾隆五十五年起,四大徽班陸續(xù)進京演出,他們相互影響,并接受昆區(qū)和秦腔的部分劇目、曲調(diào)、表演方法,又吸收了一些民間曲調(diào),就是在這樣的融合、演變和發(fā)展中京劇逐漸形成。在京劇發(fā)展的歷程中,產(chǎn)生過許多優(yōu)秀的演員。
紀(jì)錄片具有文獻價值、文化意義和美學(xué)價值,2011年元旦,中央電視臺紀(jì)錄頻道用中英文面向全球開播,它是我國首個覆蓋國內(nèi)外的紀(jì)錄片專業(yè)頻道。
當(dāng)代大畫家李苦禪撒手人寰駕鶴西游的時候,我的老師許麟廬正在山東旅行。許老聽到噩耗,立即登車,直奔北京。到了苦禪靈堂,滿頭白發(fā)的老人,長跪不起,慟哭不止。他和苦老,同是齊白石大師的弟子,手足之情,比一奶同胞還親。
過去,公交車五六分鐘來一輛,現(xiàn)在一二分鐘來一輛,方便多了。有的乘客說,現(xiàn)在坐公交上班比開私家車還快呢,很多時候我們都坐公交車了。
熙寧九年,恩州武城縣有旋風(fēng)自東南來,望之插天如羊角,大木盡拔。俄頃旋風(fēng)卷入云霄中。既而漸近,所經(jīng)縣城官舍、居民略盡,悉卷入云中??h令兒女奴婢卷去,復(fù)墜地,死傷者數(shù)人。民間死傷亡失者不可勝計,縣城悉為丘墟,遂移今縣。
第二年的端午節(jié),我到離沙地稍遠一點的一個村子里采訪。這個地方幾乎家家房前屋后都是沙棗,就像成都平原上一叢竹林一戶人家。過去我以為沙棗總是臨沙傍堿而居,其葉總是小而灰,色調(diào)總是暗而舊。但在這里,沙棗依水而長,一片蔥綠,最大的一片葉子居然有一指之長,是我過去看到的三倍之大。
門前廣場上臨時拉了一些電燈,將堡門下半截依稀照見,上半截和高高在上的門樓混在如墨的夜色里。一個正在熔化鐵水的大爐子起勁地?zé)?。鼓風(fēng)機使?fàn)t頂和爐門不停地吐著奪目的火舌。
第二天打早,母親便端一小凳,坐在這些水淋淋的盆具間,像一位老到的藝術(shù)家,開始了熟練的操作。包粽子說難不難,但真要把它包得大頭尖尾,見棱見角——按母親的說法要“俊模俊樣”,也不容易。
這種美如此生動,直教我心靈震顫,甚至畏怯。是的,人可以直面威脅,可以蔑視陰謀,可以踩過骯臟的泥濘,可以對嘰嘰咕咕保持沉默,可以對丑惡閉上眼睛,然而在面對美的精靈時卻是一種怯弱。
2009年美國網(wǎng)球公開賽。觀眾目不轉(zhuǎn)睛地期待比賽開始,發(fā)球方運動員將球舉過頭頂,蓄勢做隨時發(fā)球狀態(tài),但裁判微笑示意他再等一等。
我從認(rèn)字起,爸爸就給我買書刊,我關(guān)注的第一本文學(xué)書是爸爸在閱讀的《紅巖》,當(dāng)時書名上的字我還識不全,就念成了“紅山石”,別人都笑了,而爸爸微笑著說:“她聰明,大概的意思并沒有錯?!?/p>
Bike-to-Work Day is held every year across NorthAmerica on the third Friday of May. It was started by the League ofAmerican Bicyclists in 1956. Its aim is to promote (促進) the bicycle as a seriouschoice of getting to and from work. In today’s world where global warming is aserious issue, the bicycle is a perfect way of reducing our carbon (碳) footprint.
I often use old clothes that people don’t wearany more to make bags. I opened a small shop in my community and set up awebsite to sell the bags online. Many customers think they are fantastic. Now Iplan to write a new book about ways to use old clothes.
Tim: _______36_______,Bob.Bob: Good afternoon, Tim. Icalled you just now, but nobody answered. _______37_______?Tim: I went to the cinema.And I watched a movie named The Battle atLake Changjin.Bob: Oh, great. It’s very famous nowadays. _______38_______?
Dealing with a nosebleed(鼻出血)mightseem simple. But recently, the British RED Cross asked parents with youngchildren how to help a child with a nosebleed. About 65 percent of parents didnot ____11____ the correct action to help.
My earliest memory ofthese events began when I was around four years old. I was filled with ___12___ at that time. There were lots of ___13___ — crying, shouting, and doors slamming (砰地關(guān)上).
Mr. Zhang was a cook in Canada. He ___11___in Guangzhou, and he learned to cook in Hong Kong. He moved to Canada for workwhen he was 26 years old. Everything was good till COVID-19(新冠病毒)brokeout. Last year, he returned to China because the economy(經(jīng)濟)inCanada began ___12___ down.