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【题目】2018年3月5日上午9时,第十三届全国人大一次会议第六次全体会议在人民大会堂胜利召开,大会于3月20日上午闭幕。据此,完成下列各题。

1“两会”期间,首都北京的昼夜长短状况是 ( )

A. 昼夜平分 B. 昼长夜短 C. 昼短夜长 D. 无法确定

2为了收看“两会”开幕式,在英国伦敦留学的小王却要在2018年3月5日凌晨1:00坐在电视机前收看直播,造成两地时差的原因是 ( )

A. 地球公转 B. 两地时间观念不同 C. 地球自转 D. 转播时延误造成的

【答案】

1C

2C

【解析】地球在自转的同时还在不断地绕着太阳公转,方向都是自西向东,周期是一年,因为地球的公转时,地轴始终与平面保持66.5°的夹角,所以太阳直射的地方不同,导致各地出现不一样的季节和不一样的昼夜长短,就产生了季节变化和五带的划分。

1由题目可知,两会期间是每年的35日至19日,此时地球公转的位置是在冬至日至春分日之间,太阳直射点在南半球,此时北京的昼夜状况是昼短夜长,故选C。

2为了收看“两会”开幕式,在英国伦敦留学的小王却要在2018年3月5日凌晨1:00坐在电视机前收看直播,造成两地时差的原因是地球的自转导致地球上经度不同的地区地方时不同,故选C。

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