【多选题】
Rowland Hill was the first to___________ a proposal to use stamps.
【多选题】
Televison is a___________ invention!
【多选题】
Professor White isnt in now. Could you_________ ?
【多选题】
A: Thank you for your help.B:___________
【单选题】
I shall never_________ the days when I first set foot in Beijing.
【单选题】
I look younger because I do _________ exercise than you.
【单选题】
Try to_________ the new information with something you already know.
【判断题】
若A可逆,则<img class=jc-formula data-tex=|{ A }^{ -1 }|={ |A| }^{ -1 } src=https://huaweicloudobs.ahjxjy.cn/5A19BA468787AC28502EA25DCE29092F.png style=vertical-align: middle;/>
【判断题】
若两随机变量不相关,则两随机变量相互独立。