【简答题】若A为n阶方阵,则线性方程组Ax=0只有零解的充要条件是A的行列式 ; 有非零解的充要条件是A的行列式 .
【简答题】Word文档中编辑表格时,下列叙述不正确的是( )。
【单选题】听力原文:W: I want to watch TV and improve my English. What is your favorite TV show? M: I like sitcoms. I watch 'Friends' a lot. I never missed a single episode. Of course there are other sitcoms like 'W...
【多选题】What save-money tips are offered according to the video?
B.
pay yourself 10% of your income
C.
write a shopping list and stick to it
E.
earn more instead of save more
【简答题】Word文档中编辑表格时,下列叙述不正确的是( )。
【简答题】Word文档中编辑表格时,下列叙述不正确的是( )。
【单选题】编辑Word档时,下列叙述正确的是( )。
C.
选定文字后,执行“剪切”操作,则这些文字会被删除
D.
要删除选中的文本,按Del键与Backspace键作用是不一样的