番泻苷A中两个蒽酮母核的连接位置为
A．C1-C1 B．C4-C4 C．C6-C6 D．C7-C7 E．C10-C10
参考答案：E
My grandma _________ Chinese food ________ Western food.
A．would rather, than
B．prefers, than
C．would rather, to
D．prefers, to
Excel2000是运行在DOS下的一套电子表格软件。
