题目内容

【题目】美国国家航空航天局观测到了一颗距离太阳系不远的红矮星(恒星)耀斑爆发，它释放的能量相当于数千次太阳耀斑释放能量的总和，会吹散行星的大气层。据此完成下面小题。

【1】【1】科学家称2012年是太阳活动的高峰期，关于太阳活动说法正确的是

①太阳活动以黑子和耀斑为主要标志，主要发生在太阳内部

②太阳活动剧烈时磁针不能正确指示方向

③无线电短波通信可能会受到干扰

④黑子出现在太阳的色球层

A. ①② B. ②③ C. ①③ D. ③④

【2】【2】此次耀斑产生的带电粒子流到达附近行星时，行星上可能出现的现象有

①大气层被吹散，表面成为不毛之地 ②其表面温度一定会升高

③地球上各地都会出现极光 ④行星上可能会出现“磁暴”现象

A. ①② B. ③④ C. ②③ D. ①④

【答案】

【1】【1】B

【2】【2】D

【解析】试题分析：

【1】【1】根据所学知识知，以黑子和耀斑为主要标志的太阳活动主要发生在太阳大气层；太阳活动剧烈时使地球磁场产生“磁暴”现象，磁针不能正确指示方向；太阳活动会扰动地球电离层，使GPS定位系统无线电通信可能会受到干扰；黑子出现在太阳的光球层。

【2】【2】极光只出现在两极地区，耀斑活动可能会影响行星表面的温度，但不一定升高。

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