【題目】你切過(guò)西瓜嗎？通過(guò)西瓜的兩端，將西瓜切成兩半有多少種切法？切法實(shí)在是太多了。同樣的道理，通過(guò)兩極將地球分成東西半球的方法也很多，于是人們規(guī)定：（ ）

A. 本初子午線和180°經(jīng)線將地球劃分為東西半球

B. 20°E和160°W為東西半球分界線

C. 20°W和160°E為東西半球分界線

D. 從20°W開始往西至160°E為東半球，另一半為西半球

【答案】C

【解析】

根據(jù)經(jīng)線連接南北兩極，任何一個(gè)經(jīng)線圈都能把地球分成相等的兩份；人們把20°W和160°E經(jīng)線作為東西半球的分界線，進(jìn)行分析解答。

人們把20°W和160°E為東西半球分界線，從20°W開始往西至160°E為西半球，另一半為東半球；0°經(jīng)線和180°經(jīng)線是東西經(jīng)度的分界線。故選：C。

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