第17题: [单项选择]关于类固醇激素的叙述,不正确的是 A. 雌、孕、雄激素属于类固醇激素 B. 孕烯醇酮是合成性类固醇激素的前体物质 C. 由肝脏降解,经肾脏排泄 D. 雌、孕、雄激素及卵泡刺激素均属类固醇体激素 E. 雌激素含18个碳原子,雄激素含19个碳原子,孕激素含21个碳原子 参考答案:D
第19题: [单项选择]How do we choose our favorite colors A. Our favorite color is inborn. B. We choose our favorite color as we grow up. C. With the instruction of our parents we select them. D. We get them by chance. 参考答案:A