Official 17 Lec 2
答题结果:0/6
答题时间:0''
Question 1 of 6
What is the lecture mainly about?

A.

A hypothesis that explains how changes in Earth's motions affect climate

B.

A hypothesis that explains why the shape of earth's orbit varies over time

C.

Reasons it is difficult to find evidence to support hypotheses about the climate

D.

Analyses of the accuracy of data collected in different ways

我的答案:

正确答案:A

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