【多选题】
Thats beautiful, but___________ .
①
its too bad
②
its too expensive
③
it costs too much
④
the price is too high
【判断题】
均匀分布的密度函数为<img class=jc-formula data-tex=p(x)=\left\{ \frac { 1 }{ b-a } ,\quad x\in \left[ a,b \right] \\ \quad 0\quad ,\quad \quad x\notin \left[ a,b \right] \right src=https://huaweicloudobs.ahjxjy.cn/D325A38B346388B9123FBF0184B22226.png style=vertical-align: middle;/>
①
正确
②
错误
【单选题】
A: Could you put the books on bookshelves, please? B: Of course. [填空] A: Thats all. Everything else has been done.
①
Its a pleasure to help.
②
Is that all?
③
Im free now.
④
How should I do it?
【判断题】
四对事件<img class=jc-formula data-tex=\left\{ A，B \right\} ,\left\{ \bar { A } ,B \right\} ,\left\{ A,\bar { B } \right\} ,\left\{ \bar { A } ,\bar { B } \right\} src=https://huaweicloudobs.ahjxjy.cn/09AB2E5D303C7574090E3958A0C4BB91.png style=vertical-align: middle;/>,有一对独立，则其他对也独立。
①
正确
②
错误
【判断题】
设A,B均为n阶方阵，则<img class=jc-formula data-tex=\left| AB \right| =\left| A \right| \left| B \right| src=https://huaweicloudobs.ahjxjy.cn/3A978B4916446CB08257F3DE95493C02.png style=vertical-align: middle;/>
①
正确
②
错误