硬切换时，候选导频的搜索方式有（）
A、单步搜索
B、多步搜索
C、周期搜索
D、随机搜索
参考答案：A, C
I won't go to the concert this evening. I ______ watch the NBA on TV. It's more exciting. [ ]
A. had better
B. would rather
C. ought to
D. have to
在Excel 2003中，按Enter键后活动单元格的移动方向可以设置。
