______crude hydrocarbons into such products as gasoline and petrochemicals is at

游客2025-02-04 3

问题 ______crude hydrocarbons into such products as gasoline and petrochemicals is at the heart of the petroleum industry.

选项 A、Refine
B、Are refined
C、By refining
D、Refining

答案 D

解析

转载请注明原文地址:https://tihaiku.com/zcyy/3942925.html

相关试题推荐

随机试题

最新回复(0)

Storesusecomputerstocheckinventoryandtodeterminewhichproductsaresell