THE WORD “WHICH” IN THE SECOND PARAGRAPH REFERS TO____________ .A.P...
64.The word “which” in the second paragraph refers to____________ .
A.petroleum products
B.chemical composition
C.carbon and hydrogen
D.compounds called hydrocarbons
64.The word “which” in the second paragraph refers to____________ .
A.petroleum products
B.chemical composition
C.carbon and hydrogen
D.compounds called hydrocarbons