A. 磺胺类药物与对氨基苯甲酸分子大小相似 B. 磺胺类药物与对氨基苯甲酸分子电荷分布相似 C. 竞争性抑制二氢叶酸合成酶 D. 竞争性抑制二氢叶酸还原酶
A. vessel has turned 90°From her original course B. vessel has turned 60°From her original course C. vessel is on a reciprocal course D. emergency turn signal sound