【单选题】
The postage rate was high in the past, because post offices had to send many people to_________ the postage.
【判断题】
若A,B皆为n阶方阵,则行列式 |AB|=|A||B|
【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。
【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 remember things every day, but what do you do it?
【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”The new factory has produced (生产) more many cars than the old one.
【多选题】
Televison is remarkable if we use it___________ !
【单选题】
She has a good _________ , she can remember long lists of numbers.
【单选题】
The whole world is brought home to us_________ television.
【单选题】
There is no need to hurry. Please drive_________ .