单项选择题
A.causal B.capable C.capital D.casual
Structural traps are traps（）are formed because of a def...
单项选择题Structural traps are traps（）are formed because of a deformation in the rock layer （）contains the hydrocarbons.
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
