Where is my jacket? Could you help _______ find it, dear?
A:me
B:her
C:him
D:them
完成下列单位换算:
(1)1.6m= ____ dm= ____ mm= ____ nm;
(2)80cm= ____ km= ____ μm.
已知各项均为正数的等比数列an中,a1a2a3=5,a7a8a9=10,则a4a5a6=( )