【題目】第八屆China Speaks國際英語大賽中國賽區(qū)總決賽于2017年1月31日至2月4日在上海東方綠洲舉行。遂寧某小學(xué)的小星同學(xué)在參賽期間發(fā)現(xiàn)一個現(xiàn)象：上海下午5：30左右天就黑了，而遂寧下午6：30左右天才黑。上海的經(jīng)緯度大致是(31°N，121°E)，遂寧的經(jīng)緯度大致是(31°N，106°E)。請問：兩地天黑時間出現(xiàn)差異的原因是

A.上海比遂寧位置偏東，由于地球的自轉(zhuǎn)，上海的時間比遂寧早

B.上海比遂寧位置偏西，由于地球的公轉(zhuǎn)，遂寧的時間比上海早

C.上海比遂寧經(jīng)濟(jì)發(fā)達(dá)，生活、工作節(jié)奏快，上海比遂寧時間過得快

D.上海比遂寧緯度高，遂寧的時間比上海早

【答案】A

【解析】

地球自轉(zhuǎn)是地球繞地軸旋轉(zhuǎn)，方向是自西向東，周期是一天。自轉(zhuǎn)產(chǎn)生了晝夜更替、太陽的東升西落、地方時的差異。由于地球自轉(zhuǎn)的方向是自西向東，因此越往東的地方，時間越早。上海和遂寧緯度相同，從經(jīng)度看上海比遂寧位置偏東，因此上海的時間比遂寧早。故選A。

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