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【题目】北京时间(东八区)2017年4月22日12时23分,我国天舟一号和天宫二号顺利完成自动交会对接。据此完成下列各题。

1居住在英国伦敦的华人华侨收看了卫星发射实况转播,完成自动交会对接时,伦敦时间(零时区)为

A. 12时23分 B. 8时23分 C. 4时23分 D. 0时23分

2造成两地时间不同的原因是

A. 地球是个椭球体 B. 地球的公转 C. 地球是静止不动的 D. 地球的自转

【答案】

1C

2D

【解析】

1我国采用北京所在的东八区的区时,与零时区的伦敦时间相差8小时,按照东加西减的原则,伦敦时间为4时23分。

2地球自转是地球绕地轴自西向东转动的运动方式,其周期为一天。我们每天经历的昼夜更替,时区的变化(东面的时间早于西面的时间),日月星辰的东升西落,主要是由于地球自转运动所产生的地理现象。居住在英国伦敦的华人和华侨在当地时间2017年4月22日23点23分收看了卫星发射实况转播,是地球自转造成的两地时间不同。

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