【題目】閱讀對話，回答下列問題。

甲：“我的名字叫赤道” 乙：“我的名字叫本初子午線”

【1】關(guān)于甲、乙長度的敘述，正確的是（ ）

A. 甲與乙的長度相同 B. 甲的長度約6371千米

C. 乙的長度約4萬千米 D. 甲的長度是乙的兩倍

【2】下列敘述與乙相吻合的是（ ）

A. 指示東西方向 B. 以東是東經(jīng)，以西是西經(jīng)

C. 以北是北緯，以南是南緯 D. 以東是東半球，以西是西半球

【答案】

【1】D

【2】B

【解析】經(jīng)緯線是人們?yōu)榱烁玫卮_定地球上的位置而設(shè)置的，經(jīng)線表示南北方向，緯線表示東西方向。

【1】地球上最長的緯線是赤道，其長度約4萬千米， 經(jīng)線是連接南北兩極點的半圓，長度約等于赤道的一半，故選D。

【2】由題目可知，乙是本初子午線，該經(jīng)線指示南北方向，該經(jīng)線是東西經(jīng)度的分界線，以東是東經(jīng)，以西是西經(jīng)；不是東西半球的分界線，故選B。

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