Question

【題目】與西經(jīng)l20°經(jīng)線共同組成經(jīng)線圈的另一條經(jīng)線是

A．西經(jīng)60°

B．東經(jīng)120°

C．東經(jīng)60°

Answer 1

【答案】C

【解析】

試題分析：經(jīng)線的形狀是半圓，每條經(jīng)線與它相對(duì)的經(jīng)線組成一個(gè)經(jīng)線圈，其度數(shù)和為180°，東西經(jīng)度相反（0°經(jīng)線和180°經(jīng)線相反）．

A．與西經(jīng)60°相對(duì)的經(jīng)線的度數(shù)為東經(jīng)120°，故不符合題意

B．與東經(jīng)120°相對(duì)的經(jīng)線的度數(shù)為西經(jīng)60°，故不符合題意

C．與東經(jīng)60°相對(duì)的經(jīng)線的度數(shù)為西經(jīng)120°，故符合題意