题目内容
The water portion on our planet Earth belongs to:
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Natural resources addressed by geology include:
Which one of the following is to seeks an understanding of the origin of Earth and its development through time?
which one of the following is to examine the Earth materials and seeks to understand the many processes that operate on our planet?
The most common silicate group and make up more than 50 percent of Earth’s crust are ______ .
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