2. 外语
  3. A. Cloud-to-ground lightening occurring in the US B. Types of lightening C. Cause of lightening D. Differences between thunder a

A. Cloud-to-ground lightening occurring in the US B. Types of lightening C. Cause of lightening D. Differences between thunder a

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问题 A. Cloud-to-ground lightening occurring in the US
B. Types of lightening
C. Cause of lightening
D. Differences between thunder and thunderstorm
E. Frequencies of thunderstorms occurring in the world and the US   
*
选项
答案B
解析 借助段落中的用词特点：段落中出现了种种闪电类型：intra-cloud lightning， cloud-to-ground lightning，ball lightning及对它们相关的介绍，因此判断B是答案。
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