1(2010辽宁卷)设a,b为实数,若复数1i,则()Aa,bBa3,b1Ca,b Da1,b3答案A解析由1i,得abii,a,b.故选A.2(2010安徽卷)已知i21,则i(1i)()A.i B.iCi Di答案B解析i(1i)ii2i.3若复数z11i,z23i,则z1z2()A42i B2iC22i D3i答案A解析z1z2(1i)(3i)3i3ii242i.4(2010福建卷)对于复数a,b,c,d,若集合Sa,b,c,d具有性质“对任意x,yS,必有xyS”,则当时,bcd等于()A1 B1C0 Di答案B解析根据集合元素的唯一性,知b1,由c21,得ci,因对任意x,yS必有xyS,所以当ci时,di;当ci时,di,所以bcd1.5复数(i)3等于()A8 B8C8i D8i答案D解析由题意得(i)3(ii)38i38i,选D.