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    【题目】某日，75°N纬线圈与晨昏线相切于甲地(75°N，120°E)，且甲地地方时为12时。据此完成下列问题。

    【1】

    A. 北极圈及其以北 B. 南极圈及其以南

    C. 75°N及其以北 D. 75°S及其以南

    【2】

    A. 该日南通(32°N)太阳从东北方向升起

    B. 该日南半球白昼逐渐变长

    C. 该日北京(40°N)正午太阳高度为35°

    D. 此时新的一天占全球范围的一半

    【答案】

    【1】D

    【2】C

    【解析】试题分析：

    【1】因晨昏线与75°N纬线圈相切，且切点的地方时为12时，所以75°N及其以北为极夜，而75°S及其以南为极昼,D正确。

    【2】此时太阳直射点纬度与切点纬度之和为90°，所以太阳直射15°S，北半球各地太阳升起在东南方向，A错；因此时太阳直射点有可能向北移动，南半球昼也有可能逐渐变短，B错；太阳直射15°S，该日北京的正午太阳高度与直射点的太阳高度相差55°，为35°C正确。120°E为12:00时，自然日期变更线在西四区，新一天占全球一半多，D错。

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