Generally, the first stage in the extraction of 【crude】 oil is to drill a well into the underground reservoir.
A.grim
B.strict
C.raw
D.severe
正确答案是C
Generally, the first stage in the extraction of 【crude】 oil is to drill a well into the underground reservoir.
A.grim
B.strict
C.raw
D.severe
正确答案是C