因为an=a1*q^(n-1)=q^(n-1)
a1*a2*…*a10=a1*a1q*a1q^2*...*a1q^9=q*q^2*q^3.*q^9
=q^(1+2+3...+9)
=q^45
所以n-1=45
n=46
选B