题目内容：
[A] Lightning and thtmder, [B] Warm air and cold air.
[C] A great deal of water vapor and a rapidly rising air current.
[D] A great amount of vapor and electricity.
参考答案：
答案解析：
单选题：[A] Lightning and thtmder, [B] Warm air and cold air. [C] A
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- 题目类型：单选题
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[B] Warm air and cold air.
[C] A great deal of water vapor and a rapidly rising air current.
[D] A great amount of vapor and electricity.