【判断题】
答题说明:句子没有语法错误请选择“正确”,有语法错误请选择“错误”Discuss with children in advance which programs they can watch.
【多选题】
I want to___________ this letter to the U.S.. How much if the postage, please?
【多选题】
Im_________ to agree with you.
【单选题】
Women especially enjoy_________ in department stores at their leisure.
【单选题】
Can anything be done to_________ the negative influence of some television programs?
【判断题】
设矩阵A,B为同阶可逆矩阵,则<img class=jc-formula data-tex={ (AB) }^{ -1 }={ A }^{ -1 }{ B }^{ -1 } src=https://huaweicloudobs.ahjxjy.cn/4D0D5CA61C6CEACD30AEE46B39C339BC.png style=vertical-align: middle;/>
【判断题】
对任意<img class=jc-formula data-tex=A,B\in F src=https://huaweicloudobs.ahjxjy.cn/F3D14591D01F0CA1A92A56FBCAE958DF.png style=vertical-align: middle;/>,则<img class=jc-formula data-tex=P(A-B)=P(A)-P(B) src=https://huaweicloudobs.ahjxjy.cn/0B32C29C079587980B49094D3DEB9C00.png style=vertical-align: middle;/>
【判断题】
设A=<img class=jc-formula data-tex=\begin{ pmatrix } 1 -2 \\ -2 4 \end{ pmatrix } src=https://huaweicloudobs.ahjxjy.cn/4F154C1EF8210EBCC4121447AD222144.png style=vertical-align: middle;/>,B=<img class=jc-formula data-tex=\begin{ pmatrix } 2 6 \\ 1 3 \end{ pmatrix } src=https://huaweicloudobs.ahjxjy.cn/FC3E17EF9C4B0B48E5790528C102FAD8.png style=vertical-align: middle;/>,则AB=BA=0