A:分子式为C21H20O3Cl2
B:醚键上的氧原子至少与另外11个原子共面
C:分子中不存在手性碳原子
D:在一定条件下可发生加成、取代、氧化反应
⑴Can you help me, please?____
⑵Where is my coat?____
⑶Are they pants?____
⑷Whose dress is this?____
⑸Is this your hat?____
A. No, they aren't.
B. Yes, it is.
C. It's Kate's.
D. OK.
E. It's on the bed.
— No, there isn't. There is ______ pork.