【題目】下列關(guān)于長(zhǎng)江的敘述，正確的是（　　）

A. 長(zhǎng)江的全流域都可以通航，有“黃金水道”之稱(chēng)

B. 長(zhǎng)江水能資源豐富，尤其在下游水量大，水能資源更加豐富

C. 長(zhǎng)江上中游分界宜昌、中下游分界湖口

D. 近幾年長(zhǎng)江洪水災(zāi)害加劇的原因是降水量遠(yuǎn)高于歷史上的最大降水量

【答案】C

【解析】

試題長(zhǎng)江是我國(guó)長(zhǎng)度最長(zhǎng) 、面積最大 、流域面積最廣的河流。有“水能寶庫(kù)”和“黃金水道”之稱(chēng)，自四川省的宜賓市起向東都可通航。長(zhǎng)江水能資源主要集中的河段是上游河段，多峽谷急流,富水能；中游多曲流,多支流,多湖泊；下游水流平穩(wěn),江闊水深。長(zhǎng)江上中游的分界線是湖北宜昌；中下游分界線是江西湖口，它是鄱陽(yáng)湖與長(zhǎng)江干流的交匯點(diǎn)。近幾年長(zhǎng)江洪水災(zāi)害加劇的原因是除了降水多以外，更主要的是長(zhǎng)江中上游地區(qū)植被遭到破壞，含沙量大增；圍湖造田，湖泊面積縮小，減弱對(duì)河流水量的調(diào)蓄能力。

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