【題目】填空題:

(1)___________是等高線彎曲最大的地方。

(2)中國有兩個簡稱的省份有_____個,面積最大的省的簡稱是_______。

(3)_______是傣族的新年,是傣族最隆重的節(jié)日。

(4)_______是我國最大的平原,_________是塑造華北平原的主力。

(5)空氣質(zhì)量的好壞反映了__________________,它是依據(jù)空氣中污染物濃度的高低來判斷的,可用_____________來表示。

(6)目前長江中下游以____________為基礎(chǔ),_________為骨干,一系列綜合治理措施構(gòu)成的工程防洪體系已經(jīng)初步形成。

(7)全國的三大林區(qū)中,______________________________兩個林區(qū)的大部分在長江流域,長江淡水魚產(chǎn)量約占全國淡水魚產(chǎn)量的___________。

(8)黃河的危害,主要在________,而造成其改造的根本原因__________,________。

(9)內(nèi)蒙古自治區(qū)的_________和河南省鄭州市的_________,是黃河上、中、下游的分界處。

(10)_________是我國最長的內(nèi)流河。

【答案】山脊 山谷 5 潑水節(jié) 東北平原 黃河 空氣污染程度 污染指數(shù) 堤防 三峽工程 西南 東南 一半 下游 決口改道 中游地區(qū)水土流失嚴(yán)重,大量泥沙進(jìn)入河流 河口 桃花峪 塔里木河

【解析】

(1)在等高線地圖上彎曲最大的地方是山脊和山谷,山脊處等高線向低處凸出,山谷處等高線向高處凸出。

(2)我國有兩個簡稱的省份有5個,分別是甘肅、四川省、貴州省和云南省陜西省。面積最大的省是新疆維吾爾自治區(qū),簡稱是新。

(3)我國的民族文化豐富多彩,傣族的潑水節(jié)是傣族最大的節(jié)日,也是傣族的新年。

(4)我國三大平原是東北平原、華北平原和長江中下游平原。其中面積最大的是東北平原。華北平原是由黃河沖積形成的。

(5)空氣質(zhì)量的好壞反映了空氣污染程度_,它是依據(jù)空氣中污染物濃度的高低來判斷的,可用污染指數(shù)來表示。污染指數(shù)越大,對人體健康有害,污染指數(shù)越小,對人體健康有害。

(6)治理長江的首要任務(wù)是防洪。目前長江中下游以三峽為基礎(chǔ),三峽工程為骨干,一系列綜合治理措施構(gòu)成的工程防洪體系已經(jīng)初步形成。

(7)全國的三大林區(qū)是東北林區(qū)、西南林區(qū)和東南林區(qū)。中,東南林區(qū)和西南林區(qū)兩個林區(qū)的大部分在長江流域,長江淡水魚產(chǎn)量約占全國淡水魚產(chǎn)量的一半,是我國淡水魚的主要產(chǎn)區(qū)。

(8)黃河的危害,主要在下游,而造成其改造的根本原因下游是“地上河”,容易決口改到。根本原因是中游地區(qū)水土流失嚴(yán)重,大量泥沙進(jìn)入河流,泥沙在下游沉積,形成“地上河”。

(9)內(nèi)蒙古自治區(qū)的河口和河南省鄭州市的桃花峪,是黃河上、中、下游的分界處。

(10)塔里木河是我國最長的內(nèi)流河,分布在塔里木盆地。

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