单选题
From the first sentence of the passage, we learn that______
A、
acid rain has caused air pollution
B、
acid rain has caused widespread environmental damage
C、
acid, rain has become a much studied subject
D、
acid rain travels in all directions before it rains down
【正确答案】
B
【答案解析】
第一段第一句指出,酸雨是空气污染的一种形式,由于其所造成的普遍环境损害,最近人们对它展开了激烈的争论。
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