题目内容

【题目】 中新网5月26日电 中国地震台网正式测定:5月26日9时左右(北京时间)在西藏日喀则市谢通门县(北纬30.34度，东经87.70度)发生4.3级地震，震源深度8千米。

据此回答下面小题。

【1】地震发生时，来自中国西藏的卓玛正在国外某城市(西五区)考察，此时卓玛所在城市的区时是

A. 5月25日22时B. 5月26日6时

C. 5月25日20时D. 5月26日22时

【2】地球自转一周要24小时，那么甲、乙两地的经度相差30°，时间就相差

A. 15小时B. 15分钟

C. 2小时D. 1小时

【答案】

【1】C

【2】C

【解析】

【1】根据区时的计算，两地相差几个时区，，就相差几个小时，东边地点的时刻比西边早，东加西减，北京市东八区，国外某城市(西五区)，两地相差13个时区，所以相差13个小时，5月26日9时减去13个小时，就是5月25日20时。故选C。

【2】地球自转一周要24小时，转过的经度是360°，共24个时区，所以每个时区15°，两地相差几个时区，就相差几个小时，所以甲、乙两地的经度相差30°，时间就相差时间就相差2个小时。故选C。

该题考查时区和区时的计算，记住方法即可解答。

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