什麼是元朝
Yuan dynasty,亦拼作 Yüan dynasty,或稱為蒙古王朝(Mongol dynasty)。
蒙古遊牧民族在中國開創的朝代。成吉思汗於1215年進佔中國北方,但直到1279年,忽必烈汗才控有中國南部。蒙古人在北京建立首都(當時稱為大都)。他們重建大運河,其道路與郵驛站也維護良好。宋朝時還流通有限的紙幣,在蒙古帝國時則已全國通用。天文學、醫學和數學都有所進展;從東歐平原橫跨大草原到蒙古、中國的蒙古帝國,貿易暢通。許多外國人(以馬可孛羅最為着名)前往中國,也有許多中國人前往伊朗(Iran)和俄羅斯(Russia)遊歷,甚至遠達西歐。中國憎惡蒙古征服者,因為蒙古的管轄體制對中國人採取不利的差別待遇(參閲Kublai Khan)。中國的藝術家則藉由隱退與轉而表達自我,顯示消極的抵抗。文人畫廣受歡迎;小説有所發展,也出現新的戲劇形式。自1300年起,蒙古人中對繼承權的爭奪,削弱了中央政府;經常爆發的叛亂,多半與如紅巾的祕密會社互相聯絡。元朝於1368年被日後的明太祖所推翻。亦請參閲Ming dynasty。
1206~1368年
Yuan dynasty
orMongol dynastyDynasty established in China by Mongol nomads. Genghis Khan occupied northern China in 1215, but not until 1279 did Kublai Khan take control of southern China. The Mongols established their capital at Beijing (then called Dadu). They rebuilt the Grand Canal and put the roads and postal stations in good order. Paper money, which had had limited circulation under the Song, came to be used throughout the empire. Advances were made in astronomy, medicine, and mathematics, and trade was carried out throughout the Mongol empire from the plains of eastern Europe across the steppes to Mongolia and China. Many foreigners came to China (notably Marco Polo) and many Chinese traveled to Iran, Russia, and even western Europe. The Chinese resented the Mongol conquerors, whose governmental system discriminated against them (see Kublai Khan). Chinese artists demonstrated passive resistance by withdrawing and turning to personal expression. Literati painting became very popular; the novel developed, and new dramatic forms also appeared. Disputes over succession weakened the central government from 1300 on, and rebellions were frequent, many connected with secret societies such as the Red Turbans. The dynasty was overthrown in 1368 by the future Hongwu emperor. See also Ming dynasty.
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什麼是新生兒
從娩出開始至出生後28天的嬰兒。這個時期稱為新生兒期。約90%以上的新生兒為正常新生兒,其他為低出生體重兒、早產兒、小於胎齡兒、過期產兒以及巨大兒等。正常新生兒通常指孕37~42周娩出的體重在2500~4000g之間,各器官發育相對成熟的足月兒。新生兒期的特點是嬰兒...
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什麼是熟地黃
常用補血藥。別名熟地。始載於《本草圖經》。為玄蔘科多年生草本植物地黃Rehmanniaglutinosa根經加黃酒拌蒸至內外色黑而油潤,或直接蒸至黑潤而成(圖1)。因其色黃,質量下沉,蒸熟曬乾入藥,故名。產地和性狀中國大部地區均有生產,主產於河南孟縣、温縣、武陟、博愛等...
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什麼是合成抗菌藥
用化學合成方法制成的抗菌藥物。主要包括磺胺類(見磺胺類藥)、喹諾酮類、呋喃類等。喹諾酮類有別於磺胺和抗生素的一類抗菌藥物,其化學結構中均有4-吡啶酮-3羧酸(見圖)。這類藥物的特點是:抗菌活性強;細菌對這類藥物和其他類抗生素之間無交叉耐藥性;對質粒介導的耐藥...
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什麼是殺蟲藥中毒
殺蟲藥進入人體引起的中毒。殺蟲藥是來自植物或人工合成用以殺滅農業害蟲和衞生害蟲的有機化合物。因為殺蟲藥對農業增產的效果十分顯著,對控制多種傳播傳染病的媒介昆蟲又非常有效,已成為城鄉人民生產和生活的心需品。除劇毒殺蟲藥能引起人、畜中毒外,一些低毒殺...