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【題目】 中新網5月26日電 中國地震臺網正式測定:5月26日9時左右(北京時間)在西藏日喀則市謝通門縣(北緯30.34度,東經87.70度)發生4.3級地震,震源深度8千米。

據此回答下面小題。

1地震發生時,來自中國西藏的卓瑪正在國外某城市(西五區)考察,此時卓瑪所在城市的區時是

A. 5月25日22時B. 5月26日6時

C. 5月25日20時D. 5月26日22時

2地球自轉一周要24小時,那么甲、乙兩地的經度相差30°,時間就相差

A. 15小時B. 15分鐘

C. 2小時D. 1小時

【答案】

1C

2C

【解析】

1根據區時的計算,兩地相差幾個時區,,就相差幾個小時,東邊地點的時刻比西邊早,東加西減,北京市東八區,國外某城市(西五區),兩地相差13個時區,所以相差13個小時,5月26日9時減去13個小時,就是5月25日20時。故選C。

2地球自轉一周要24小時,轉過的經度是360°,共24個時區,所以每個時區15°,兩地相差幾個時區,就相差幾個小時,所以甲、乙兩地的經度相差30°,時間就相差時間就相差2個小時。故選C。

該題考查時區和區時的計算,記住方法即可解答。

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