If you miss a class, you should_________.

If you miss a class, you should_________.A.call the teacher or a classmate to

查看答案

They talked and talked as if they _________ never meet agai

They talked and talked as if they _________ never meet again.A.will B.would C.s

查看答案

What we have to take _________ the courses offered only for

What we have to take _________ the courses offered only for this term.A.are B.i

查看答案

已知a+b=(2,-8),a-b=(-8,16),则 a·b=________.

已知a+b=(2,-8),a-b=(-8,16),则 a·b=________.

查看答案

在对时间序列进行速度分析时,应注意的事项有(  )。

在对时间序列进行速度分析时,应注意的事项有(  )。A.不宜采用几何平均法计算平均发展速度 B.不需要结合水平指标进行分析 C.速度指标数值与基数大小有密切关系

查看答案