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    【题目】2015年10月12日至18日，国家天文台在日面上观测到多次黑子和耀斑活动。据此完成下列问题。

    【1】有关太阳活动的正确叙述是

    A. 太阳活动是太阳内部的变化

    B. 黑子和耀斑的活动周期约为11年

    C. 耀斑出现在太阳光球层

    D. 黑子是色球层上出现的暗黑的斑点

    【2】太阳活动剧烈时，对地球产生的影响可能是

    A. 干扰地球磁场引发“磁暴”现象

    B. 地面无线电长波通信受到影响

    C. 全球各地降水量都明显增多

    D. 两极地区产生极昼极夜现象

    【答案】

    【1】B

    【2】A

    【解析】试题分析：

    【1】太阳活动是地球外部大气层释放能量的不稳定导致的，A错。耀斑和黑子活动周期为11年，B对。耀斑发生在色球层上，C错。黑子是光球层上黑色的斑点，D错。故选B。

    【2】太阳活动剧烈时，会干扰地球磁场引发“磁暴”现象，A对。太阳活动导致电离层扰动，地面无线电短波通信受到影响，B错。会对地球气候有影响，不一定降水量增多，C错。两极地区出现极昼极夜现象与地球公转有关，与太阳活动无关，D错。故选A。

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