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【题目】公元前28年,史籍曾记载:三月乙未,日出黄,有黑气大如钱,居日中央。据此回答下列各题。

【1】这种现象发生在太阳的( )

A.光球层 B.色球层

C.日冕层 D.太阳内部

【2】再次观察到此种现象的时间大约是( )

A.公元前39年 B.公元前17年

C.公元48年 D.公元17年

【答案】

【1】A

【2】B

【解析】

试题分析:

【1】资料中记载的黑气是太阳黑子,它比太阳表面温度低,在太阳表面形成暗斑,看起来象是太阳变黑了一块,太阳黑子主要发生在太阳的光球层。色球层发生的是耀斑,是太阳增亮的现象;日冕层发生的是太阳风。

【2】太阳黑子出现的平均周期约为11年,因此再次观察到此种现象的时间大约是公元前17年,所以B正确。

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