Which minerals have been proved to be insufficient? According to the passage, what is the purpose of China’s geological researc

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问题 Which minerals have been proved to be insufficient?
According to the passage, what is the purpose of China’s geological research?

选项 A、To develop China’s mining industry.
B、To develop China’s heavy industry.
C、To develop China’s oil industry.
D、To distribute minerals evenly in China.

答案A

解析
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