B20 represents ________.
A. a variety of broccoli used in the production of cellulosic ethanol
B. a new vitamin recently isolated from sugar cane bagasse
C. a ratio of biodiesel to petrodiesel in alternative vehicular fuels
D. a bacterial strain used to ferment corn to make ethanol
E. a synthetic compound that can be mixed with fossil fuel to give more energy
Answer: C. a ratio of biodiesel to petrodiesel in alternative vehicular fuels
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In the Paleozoic Era the North American continent grew westward because of the accumulation of the Cordillera.
Answer the following statement true (T) or false (F)
The most abundant fossil fuel in the United States is ________
A) crude oil B) nuclear power C) natural gas D) coal
The Russian region is very complex culturally with its people belonging to about thirty major ethnic groups and speaking over one hundred languages
Indicate whether the statement is true or false
A(n) ____ is usually characterized by clear skies, gentle winds, and a general lack of precipitation
a. anticyclone b. front c. cyclone d. squall line e. typhoon