【題目】關(guān)于南極洲的敘述，正確的是(　　)

A. 南極大陸全部位于南極圈以內(nèi)

B. 是世界上跨經(jīng)度最廣的、緯度最高的大洲

C. 發(fā)達(dá)國家有優(yōu)先開發(fā)利用的特權(quán)

D. 冰川的融化會導(dǎo)致地球氣候變暖

【答案】B

【解析】

本題考查了南極地區(qū)的基本概況。

南極地區(qū)包括南極大陸及其沿海島嶼和陸緣冰，還包括南太平洋、南大西洋和南印度洋的一部分；故答案A錯誤。南極洲絕大部分位于南極圈以內(nèi)，是七大洲中緯度位置最高、跨經(jīng)度最廣的大洲；故答案B正確。極地地區(qū)是研究地球環(huán)境的“天然實驗室”。20世紀(jì)50年代以來，各國掀起了極地科學(xué)考察的熱潮。世界各國家擁有平等開發(fā)利用的權(quán)力；故答案C錯誤。地球變暖的一個征兆是南北極地地區(qū)永久冰雪的快速消融。20世紀(jì)90年代以來，南極洲冰山脫離南極大陸的速度與日俱增，南極大陸冰蓋的體積迅速縮��；故答案D錯誤。

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