A:3
B:4
C:5
D:6
Daming's father is __________ the left.
如图,AB=8cm,AD=BC=5cm,则CD等于( )
等比数列{an}的各项均为正数,且a5a6+a4a7=18,则log3a1+log3a2+···+log3a10=( )