What is the text about? Which two rings show the weather 12 years ago?

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问题 What is the text about?
Which two rings show the weather 12 years ago?

选项 A、The eleventh and twelfth ring from outside to inside.
B、The eleventh and twelfth rings from inside to outside.
C、The twelfth and thirteenth rings from outside to inside.

答案A

解析 本题要求看懂文章第三段,因此必须仔细阅读。第三段举了如何看年轮知道天气的例子,如,要知道十年前天气,就从外(outside)向里(inside)数第十条和第十一条年轮,以此推理,题中问哪两条年轮显示了十一年前的天气,那就看第十一条和第十二条,而且是由外向内的。
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