单项选择题
A.是D。 B.是A。 C.是B。 D.是C。
Consider two length-N sequences, both defined for , pe...
单项选择题Consider two length-N sequences, both defined for , perform N-point circular convolution on them, the resulting sequence still falls on A、正确 B、错误
拟将多糖从溶液中沉淀出来,常用的有机溶剂为()A.乙醚 B.乙醇 C.乙酸乙酯 D.氯仿
单项选择题拟将多糖从溶液中沉淀出来,常用的有机溶剂为()