单项选择题
A.that, that B.what,what C.what,that D.that,what
he oil（）in a source bed, and a marine shale.A.dominates...
单项选择题he oil（）in a source bed, and a marine shale.
A.dominates B.originates C.terminates D.fascinates
Eventually chemical changes（）the generation of petroleu...
单项选择题Eventually chemical changes（）the generation of petroleum.
A.hand in B.give in C.take in D.result in
As time goes on the organic material is buried deeper a...
单项选择题As time goes on the organic material is buried deeper and hence（）higher temperatures and pressures.
A.is made up of B.is absorbed in C.is exposed to D.is known as
