A-A+
Corn-based ethanol mightnot be chosen as an al
问题详情
Corn-based ethanol mightnot be chosen as an alternative because [A]carbon reduction in both fuel productionand burning might be hard． [B]California also intends to cut downemissions from new vehicles． [C]it is almost impossible for vehicle fuelto produce l0％lesscarbon． [D]California’S corns are chieflytransported by cars and trucks．
参考答案
正确答案：A
原因细节题。定位在第三段尾句。第三段尾句说：施瓦辛格下令到2020年交通燃料必须减少10%的碳释放量：在生产燃料和燃烧燃料两个方面都达到这个标准，因此，简单地转向以玉米为主料的酒精燃料就不太可能了。由此可见，原因在于“在燃料生产和燃烧两方面减少碳排放可能很困难”。
