题型:问答题 简答题 Since he started high school, he’s come to school by bike_____. [ ]A. on his own B. by his own C. in his own D. with his own 查看答案
题型:问答题 简答题 下列哪项是阿托品的结构特征()A.为东莨菪醇与莨菪酸生成的酯B.为莨菪醇与莨菪酸生成的酯C.为莨菪醇与消旋莨菪酸生成的酯D.为山莨菪醇与莨菪酸生成的酯E.为东莨菪碱与樟柳酸生成的酯 查看答案