GRE Text Completion: ETS Fundamental-GRE填空ETS基础 - ZST59775Q447N9RMX

Nature's energy efficiency often (i)____________ human technology: despite the intensity of the light fireflies produce, the amount of heat is negligible; only recently have humans developed chemical light-producing systems whose efficiency (ii)____________ the firefly's system. A. outstrips B. stimulates C. inhibits D. rivals E. determines F. reproduce