因式分3a+12a2+12a3=______.
3a+12a2+12a3=3a(1+4a+4a2)=3a(1+2a)2.
故答案为:3a(1+2a)2.
________is no possibility________she can finish the task in two hours.[ ]
A. There; that
B. It; that
C. There; whether
D. It; whether
单侧唇裂整复术的较合适的年龄在()。
A.1~2个月龄
B.3~6个月龄
C.1~2个岁
D.3~6个岁
E.6~8个岁