题目内容
测绘标准的特征包括()。
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1.2.1 The petroleum consists of organic molecules composed of ( )and ( ).
1.2.2 The three forms of petroleum are natural gas, crude oil and asphaltum.
1.2.3 The petroleum is stored in the pores of the rock.
1.2.4 The oil production belongs to the midstream sector of the petroleum industry chain.
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