- 问题详情:用动词的适当形式填空。 A:Peter,whydoyoulooksotired? B:I(1) (stay)onlinelastnight. A:Maybeyouwereonlinetoolong.You’dbetter(2) (have)agoodrest. B:Thankyou.(3) youever ...
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- 问题详情:若i(bi+1)是纯虚数,i是虚数单位,则实数b=______.【回答】0.【考点】复数的基本概念.【分析】由i(bi+1)=﹣b+i,又i(bi+1)是纯虚数,即可得到实部等于0,则b可求.【解答】解:i(bi+1)=﹣b+i,又i(bi+1)是纯虚数,则﹣b=0,即b=0.故*为:0.【点评】本题考查了复数代数形式的乘除运算,考查了复数的基本概念,是...
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