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【题目】2011年9月29日21时16分3秒,天宫一号在酒泉卫星发射中心发射升空。至20 11年10月6日18时,天宫一号已绕地球飞行l09圈。据此完成下列各题。

【1】天宫一号发射时地球公转的速度( )。

A.由快变慢 B.由慢变快

C.接近最快 D.接近最慢

【2】天宫一号发射时,太阳直射点的纬度位置和移动方向是( )。

A.在北半球并向北移动 B.在北半球并向南移动

C.在南半球并向北移动 D.在南半球并向南移动

【答案】

【1】B

【2】D

【解析】

试题分析:

【1】天宫一号于2011年9月29日发射,故地球的公转运动正由远日点逐渐向近日点运动过程中,故公转速度逐渐加快,所以B正确。

【2】天宫一号于2011年9月29日发射,刚过秋分日9月23日,故太阳直射点位于南半球并向南移,所以D正确。

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