题目内容
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[主观题]
The main idea of the second paragraph is that ______.A.the USA is one of the richest count
The main idea of the second paragraph is that ______.
A.the USA is one of the richest countries in the world
B.the Sahara Desert is a very poor region
C.a country's wealth depends on many factors
D.natural resources are an important factor in the wealth or poverty of a country
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