OFDM的主要优势有（）.
A、消除ISI
B、消除MAI
C、提高频谱效率
D、减轻衰落影响
参考答案：A, C, D
Han Han is one of _______________ teenager writers today, though some old writers don’t like him very much.
A．more famous
B．more famous
C．the most famous
D．famous
创业板上市公司股票发行申请未获核准的，一年内不得再次申请。( )
