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A.-2 B.-1 C.1 D.2
设复数:z1=1+i,z2=x+2i(x∈R),若z1z2为实数,则x=
A.-2
B.-1
C.1
D.2
(理)设复数:z1=1+i,z2=x+2i(x∈R),若z1z2为实数,则x=