第18题: [单项选择]Henry Ford changed the American society ______.( ) A. through numerous mechanical inventions B. through automotive technological revolution C. through great social revolution D. through radical political reforms 参考答案:B
第19题: [单项选择]下列不属于挥发酚的是( )。 A. 甲酚 B. 二甲酚 C. 对硝基酚 D. 硝基酚 参考答案:C