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【题目】下列关于地球外部圈层的叙述,正确的是

A. 地球外部圈层包括岩石圈、水圈、生物圈和大气圈

B. 地球外部圈层和岩石圈之间相互渗透,相互联系,相互制约,形成自然环境

C. 水圈是一个不连续但规则的圈层

D. 大气圈的主要成分是氧和氢

【答案】

【解析】试题分析:地球的外部圈层分为:大气圈、生物圈和水圈,岩石圈属于地球内部圈层,故A不符合题意;

地球的外部圈层。包括大气圈、水圈、生物圈。相互联系、相互影响形成有机的整体。B对;

水圈由各种水体组成,并通过水的三态变化,使各种水体可以相互转化,构成一个连续的圈层,由于水的三态变化,使地球上的各种水体可以相互转化,通过水循环构成一个动态的圈层, 各种水体在数量上和空间分布上存在很大差异,因而水圈又是一个不规则的圈层,所以水圈是一个连续但不规则的圈层;大气圈是包裹地球的气体层,主要成分是氮和氧,D错。

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