Official 37 Lec 1
Question 4 of 6
Why does the professor mention the dark brown color of soil?

A.

To explain that soil gets its color mainly from inorganic inputs

B.

To indicate that humus is more easily transformed than the other components of soil

C.

To show how the transformation and combination of inputs create the characteristics of soil

D.

To discuss how the characteristics of humus are changed by weathering

正确答案:C

显示答案
进入答题
00:00
00:00
隐藏原文

译文

精听文本