A:total; has been produced
B:totals; is produced
C:totals; are produced
D:total; are being produced
若1-2x2011=a0+a1x+a2x2+⋯+a2011x2011x∈R,则a0+a1+a0+a2+⋯a0+a2011=( )
如图为患血友病的某家族系谱图,该病为伴X隐性遗传,其中7号的致病基因来自( )