【单选题】
设 4 阶方阵A 的行列式为 3,则 A的伴随矩阵 <img class=jc-formula data-tex={ A }^{ * } src=https://huaweicloudobs.ahjxjy.cn/9018D88AD10C0611187281FB224EFA8E.png style=vertical-align: middle;/>的行列式为
【单选题】
表示两事件A,B的“和事件”的是A.<img class=jc-formula data-tex=A\subset B src=https://huaweicloudobs.ahjxjy.cn/C71575BA4DFD20383E7F5C41F8A28934.png style=vertical-align: middle;/>; B.<img class=jc-formula data-tex=A\bigcup B src=https://huaweicloudobs.ahjxjy.cn/982CA6CED9D227756514768C253E1E65.png style=vertical-align: middle;/>; C.<img class=jc-formula data-tex=A\bigcap B src=https://huaweicloudobs.ahjxjy.cn/904886EFF42292411706DCA15D31C87D.png style=vertical-align: middle;/>; D.<img class=jc-formula data-tex=A-B src=https://huaweicloudobs.ahjxjy.cn/E7913F72D5FDBF5C2EF8AE9136291C29.png style=vertical-align: middle;/>
【单选题】
<img src=http://p.ananas.chaoxing.com/star3/origin/8fc468080f8681834eba22f6d3bedd05.png/>
【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”It is difficult to memory something you dont understand.
【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”You shouldnt take anything doesnt belong to you.
【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”Should you jog too? If you do, be sure to ask your doctor for an advice.
【判断题】
阅读课文II.Everybodys Jogging, 判断下列句子表述内容的正误:Everyone must increase his distance half a mile every two weeks.
【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”Your long-term memory contains everything that you remember.
【判断题】
阅读课文II. Department stores 判断下列句子表述内容的正误:Customers can enjoy other services besides buying goods in a store.
【判断题】
阅读课文II.Everybodys Jogging, 判断下列句子表述内容的正误:Jogging cost you nothing but time.