单选题A To examine the chemical elements in the Ice Age.B To look into the pattern of solar wind activity.C To analyze the composition of different trees.D To find out the origin of carbon-14 on Earth.
题目
单选题
A
To examine the chemical elements in the Ice Age.
B
To look into the pattern of solar wind activity.
C
To analyze the composition of different trees.
D
To find out the origin of carbon-14 on Earth.
相似考题
参考答案和解析
正确答案：
C
解析：
细节题。从录音结尾来看，科学家的主要目的是通过对树木年轮的考查来研究“solar wind activity”。
细节题。从录音结尾来看，科学家的主要目的是通过对树木年轮的考查来研究“solar wind activity”。