-- pale you look! Are you feeling all right?
-- I'm not feeling well. I've got toothache.
A:How a
B:How
C:What a
D:What
夏季雷雨天时,我们总是先看到闪电后听到雷声,说明光速比声速 ____.(选填“快”或“慢”)
将看到的中文翻译成英文
分式aa2+2a化简的结果为 ____.
34052419800101002X