【題目】成語(yǔ)“南轅北轍”指要到南方去,卻駕著車(chē)往北方走。比喻行動(dòng)和目的地相反,最后不能達(dá)到目的地。如果是“東轅西轍”,理論上是可以達(dá)到目的地,其原因是

A.經(jīng)線(xiàn)等長(zhǎng),緯線(xiàn)不等長(zhǎng)B.經(jīng)線(xiàn)是半圓,緯線(xiàn)是圓

C.地球不轉(zhuǎn)動(dòng)D.地球自西向東公轉(zhuǎn)

【答案】B

【解析】

根據(jù)經(jīng)線(xiàn)是連接南北兩極并同緯線(xiàn)垂直相交的半圓,也稱(chēng)子午線(xiàn)。經(jīng)線(xiàn)指示南北方向;所有經(jīng)線(xiàn)都呈半圓狀且長(zhǎng)度相等;兩條正相對(duì)的經(jīng)線(xiàn)形成一個(gè)經(jīng)線(xiàn)圈;任何一個(gè)經(jīng)線(xiàn)圈都能把地球平分為兩個(gè)半球。緯線(xiàn)是在地球儀上,順著東西方向,環(huán)繞地球儀一周的圓圈。所有的緯線(xiàn)都相互平行,并與經(jīng)線(xiàn)垂直,緯線(xiàn)指示東西方向。緯線(xiàn)圈的大小不等,赤道為最大的緯線(xiàn)圈,從赤道向兩極緯線(xiàn)圈逐漸縮小,到南、北兩極縮小為點(diǎn),進(jìn)行分析解答。

經(jīng)線(xiàn)是連接南北兩極并同緯線(xiàn)垂直相交的半圓,也稱(chēng)子午線(xiàn)。經(jīng)線(xiàn)指示南北方向;所有經(jīng)線(xiàn)都呈半圓狀且長(zhǎng)度相等,故“南轅北轍”最后不能達(dá)到目的地;緯線(xiàn)是在地球儀上,順著東西方向,環(huán)繞地球儀一周的圓圈。所有的緯線(xiàn)都相互平行,并與經(jīng)線(xiàn)垂直,緯線(xiàn)指示東西方向,故如果是“東轅西轍”,理論上是可以達(dá)到目的地。結(jié)合題意。故選:B。

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